https://www.ogilviegeoscience.com/blog daily 1.0 2026-04-03 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/2909ae3b-0b9b-415c-8072-74c60e43751e/Logo_notext.jpg https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/4f724d85-45bb-439b-aca2-f07660085e25/Fig+103.jpg https://www.ogilviegeoscience.com/blog/field-trip-to-aberdeen-art-gallery monthly 0.5 2026-03-29 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/05de5ed9-235f-4c52-96a9-cde6de98e6a7/27_1n.png Blog - “Field-trip” to Aberdeen Art Gallery - Make it stand out City of Aberdeen. Location of (water-filled) Rubislaw Quarry by red arrow and Aberdeen Art Gallery (black arrow) https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/94dd2ef1-6a37-4748-b83b-030aa3661142/pillars.png Blog - “Field-trip” to Aberdeen Art Gallery - Make it stand out Sculptured columns in Aberdeen Art Gallery. Rubislaw granite is on the left and Peterhead granite on the right. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/36b3cceb-84ce-45fa-be0b-8777328a87fb/72_3.jpg Blog - “Field-trip” to Aberdeen Art Gallery - Make it stand out Whatever it is, the way you tell your story online can make all the difference. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/7eeb9d8e-068d-40a4-a162-227213380acb/72_2.png Blog - “Field-trip” to Aberdeen Art Gallery - Make it stand out Different “granites” used in the sculpture stone columns in Aberdeen Art Museum - see the key above for a description https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/25b45eb9-32fa-47d0-be6e-de7c960c1323/IMG_1464.JPEG Blog - “Field-trip” to Aberdeen Art Gallery - Make it stand out Granite clock - everyone should have one ! Virtual microscope https://www.virtualmicroscope.org/content/two-mica-granite-aberdeen#:~:text=In%20thin%20section%20the%20rock,UK%20Virtual%20Microscope https://www.ogilviegeoscience.com/blog/geology-of-river-tummel-pitlochry-scotland monthly 0.5 2026-03-29 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/3ec4b092-7159-43ee-8d65-3f500e160ea4/Screenshot+2026-03-15+at+10.54.11.png Blog - Pleasant circular walk, Pitlochry Dam, Scotland. - Make it stand out Map with geological shading from BGS showing the dam dividing the loch and river. The footbridge can be seen on the right hand side near Pitlochry festival theatre. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/f29b7e03-1a02-4a5d-84ad-d3fdb266d9ea/26_1.png Blog - Pleasant circular walk, Pitlochry Dam, Scotland. - Make it stand out View along River Tummel from the top of the Pitlochry dam. The footbridge is in the distance and dam information boards on the right. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/f395d098-c9e9-4247-8143-31b2f180acae/26_2.png Blog - Pleasant circular walk, Pitlochry Dam, Scotland. - Make it stand out Views towards the dam - on the left are the dipping rocks of the Southern Highlands Group and a view from the bank on the right. https://www.ogilviegeoscience.com/blog/lake-forfar-and-its-devonian-age-fish monthly 0.5 2026-03-02 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/2b9a8865-1a9f-4a52-89ee-915dd038a1f0/map+aberl.png Blog - A trip to Aberlemno Quarry in Midland Valley, Scotland - Make it stand out Location of Aberlemno Quarry just to the S of Aberlemno - image from BGS geology viewer https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/75d32195-d406-4ff4-af02-56f14f1da442/25_2.png Blog - A trip to Aberlemno Quarry in Midland Valley, Scotland - Make it stand out Facing west along the long (mainly) sandstone exposure at Aberlemno quarry. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/39db555d-6395-4c1a-be62-c8056a20c9ca/25_3.png Blog - A trip to Aberlemno Quarry in Midland Valley, Scotland - Make it stand out Cross bedding in the Scone Sandstone at Aberlemno Quarry. On right view are mix of cross beds and tool marks (more vertical ones at top). https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/bd54e538-f431-46f0-9ef9-4c00cbeeb312/25_4.png Blog - A trip to Aberlemno Quarry in Midland Valley, Scotland - Make it stand out Plumose structure (hammer in middle of it) showing direction of joint propagation and (on right) a small fold in more ductile muddy units in between channels. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/b3997b52-da3e-486e-8f76-8242b42b17a4/25_6.png Blog - A trip to Aberlemno Quarry in Midland Valley, Scotland - Make it stand out Different plant material collected in laminate rocks in Tillywhandland Quarry and Aberlemno Quarry https://www.ogilviegeoscience.com/blog/geology-of-inverbervie-e-scotland monthly 0.5 2026-03-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/37433d70-2b21-4b52-ae69-784f8784b6ba/map.png Blog - Geology of Inverbervie, East Scotland - Make it stand out Route and geology map of the area showing the A92 main road and approx walking path (white dashed line) from Inverbervie to Gourdon. The dominant (dull) green colour represents outcrops of Lower ORS conglomerates and sandstones, later disturbed by igneous intrusions along the foreshore. Map from BGS geology viewer. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/79fdf369-1bbf-4d57-a651-1aa64f0ca8f5/IMG_1209.JPEG Blog - Geology of Inverbervie, East Scotland - Make it stand out View northwards across the pebble beach and some of the outcrops to the north https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/b0ef1d67-60ad-4935-8a13-77d8c27aab3a/24_3web.png Blog - Geology of Inverbervie, East Scotland - Make it stand out Clearly dipping conglomerates of the Gourdon Sandstone Fm - Onyx the lab for scale https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/febe8d4a-c221-4af1-9cf6-830aa8982102/24_3.png Blog - Geology of Inverbervie, East Scotland - Make it stand out Mafic, olivine rich intrusion at south end of Inverbervie Bay at the start of my walk. The scale is next to a series of large holes (some a few cms diameter) where minerals have been plucked out. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/d49444dd-e5c9-4f19-9199-d7432ecbfaff/24_3.png Blog - Geology of Inverbervie, East Scotland - Make it stand out Contact between conglomerate and a dike intrusion- close up of the silica rich, pink coloured intrusive igneous rock BGS description of the dikes: North Britain Siluro-Devonian Calc-Alkaline Dyke Suite-Quartz-feldspar-porphyry. These igneous rocks are magmatic (intrusive) in origin. Rich in silica, they form intruded batholiths, plutons, dykes and sills. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/c3c87c73-26a7-40ec-96ee-9a30f5386c02/24_4.png Blog - Geology of Inverbervie, East Scotland - Make it stand out Large, rounded clast of igneous rock within the conglomerates at northern end of Horse Crook Bay - with example of large, rounded clast. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/a96a46c4-312c-4c26-b61d-6ebf505eb03c/24_1.png Blog - Geology of Inverbervie, East Scotland - Make it stand out Conglomerates overlying pebbly coarse sandstones and finer grained red sandstones (knife scale) at the bottom of this Lower Devonian exposure - on the foreshore just at the start of Gourdon village. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/e0c225ae-47fc-4618-aa89-e8a6382c53d4/Pebbles_struct.png Blog - Geology of Inverbervie, East Scotland - Make it stand out A bit of structural geology on the pebbles and cobbles on the foreshore at Gourdon - note how the water has seeped into the fractures in this schist on the left. On the right the Andy cube is next to a set of conjugate faults in this sandstone. https://www.ogilviegeoscience.com/blog/mechanical-stratigraphy-in-scotlands-geology-amp-beyond monthly 0.5 2026-02-15 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/6bd354d8-4301-43b0-8aee-75c10065d3cb/23_1n.png Blog - Mechanical Stratigraphy - Make it stand out Fractures in the plunge area of the Khaviz anticline, Iran - showing higher intensity of fractures in thinner beds than in thicker beds. From Ole Petter Wennberg. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/28f2c96e-9547-4082-a640-65a83eb6c1b5/23_1n.png Blog - Mechanical Stratigraphy - Make it stand out Cupido Platform Carbonates (E Cret), Las Palmas Canyon, Mexico; unfractured limestones on the left, fractured dolomites on the right of the limestones. On the right hand photograph, only the burrows infilled by dolomite are fractured - the background limestones is unfractured. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/a5b22709-dcd6-4b5c-8de4-ce0b8f68ff9f/23_3.png Blog - Mechanical Stratigraphy - Make it stand out Interbedded sandstones and shales, E Beach St Andrews, UK. The sandstones are more highly fractured than the shales (some are shown with red lines on right hand side). https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/5f690c70-e77e-4e0a-9425-ccae8242f68b/23_4.png Blog - Mechanical Stratigraphy - Make it stand out Dipping sandstone beds encased in shales; note the high intensity of fractures in the sandstone https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/efed5b7c-20f9-4fc0-b8b8-c95070cc97c4/23_5.jpg Blog - Mechanical Stratigraphy - Make it stand out Interbedded limestones and cherts (Pennapiedimonte, Italy) of Upper Cret. age; the thinner micritic limestone beds are most fractured. Outcrop example from the Majella anticline in the foreland fold-and-thrust belt of the Central Apennines, a world-class analogue for the study of fractured carbonate reservoirs. ‍This figure features in the “nothing beats the field” series in GeoExpro magazine https://www.linkedin.com/feed/update/urn:li:activity:7196415896175706113/ https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/859fa858-c0fc-4f4e-900e-13df786878d9/23_6.png Blog - Mechanical Stratigraphy - Make it stand out Bed bound fractures in dolomite (brown coloured rocks, the limestones are grey coloured). The laminated unit above the limestone (at bottom) is unfractured. This is overlain by unfractured turbidites. The thinner turbidite layer above is heavily fractured. https://www.ogilviegeoscience.com/blog/structural-geology-at-auchmithie-e-scotland monthly 0.5 2026-01-30 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/edbb9812-dfa8-4c3f-8891-e67baf5890fe/22_map.png Blog - Structural Features at Auchmithie, E Scotland - Make it stand out Location of Auchmithie on Scotland’s E coast (Google maps) and (right) geological map of the beach and surrounding area. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/42003ba2-1048-4229-8827-5eecab2dfd04/LK_30_01_26.png Blog - Structural Features at Auchmithie, E Scotland - Make it stand out Steep vertical faults on a cliff section of conglomerate - the white fill is baryte. Black dog for scale. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/13a84005-bc26-4470-8791-7dd9a3667720/22_3.png Blog - Structural Features at Auchmithie, E Scotland - Make it stand out Looking down on small faults filled with barytes in an outcrop of conglomerate on Auchmithie beach https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/137f3153-41e2-42f3-82c8-4edafcdbbcac/22_4.png Blog - Structural Features at Auchmithie, E Scotland - Make it stand out White arrow points at a fractured pebble in the Auchmithie conglomerate. The darker pebble to the right of it has also been displaced. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/49714091-61c3-47b5-95dd-f12d36f0f597/22_5.png Blog - Structural Features at Auchmithie, E Scotland - Make it stand out Network of sedimentary injection structures in the Auchmithie conglomerate https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/d248c092-11f9-4afb-838f-ed10af629e83/22_6.png Blog - Structural Features at Auchmithie, E Scotland - Make it stand out Fracture swarms (arrows) that cut through both the conglomerate and the sandstones although the sandstones have more background (diffuse) fractures https://www.ogilviegeoscience.com/blog/polystyrene-conglomerate-stonehaven monthly 0.5 2026-01-26 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/dc60e05a-5c3d-4b1c-adbb-06e13f3d8d6d/21_1.png Blog - Landslide at Stonehaven - with polystyrene clasts ! - Make it stand out Landslides on the hillside at the southern end of Craigeven Bay, Stonehaven https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/ed2c00c9-dccb-4c76-a56b-ea80d8913846/21_2.png Blog - Landslide at Stonehaven - with polystyrene clasts ! - Make it stand out Muddy deposit at base of the landslide next to the outflow pipe; with various clasts (sizes and shapes). On the right a further view of the deposit with a sticky mud matrix and various clasts including a piece of polystyrene. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/0aa8c15d-20d4-4018-861c-bbb8adb5ba12/21_3.png Blog - Landslide at Stonehaven - with polystyrene clasts ! - Make it stand out Blocks of carbonate (yellow-brown) incorporated into the landslide deposit and on the right are boulders of the carbonate plus the greenish serpentinite which pick out the line of the Highland Boundary Fault https://www.ogilviegeoscience.com/blog/62kpv2lzoc1feydaunsa927hwm47u7 monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/886f0bf3-ba5e-4857-93b6-ad071c645610/20_1.png Blog - Fracture Swarms Explained - Make it stand out Strata-bound fractures and swarms in the Bibi Hakimeh oil field (Iran); an ideal shallowing up cycle of the Asmari Formation with a typical fracture pattern in a forelimb of the anticline [1] https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/e34bc6b8-dd1a-4ced-99ac-c6e37339c147/20_2.png Blog - Fracture Swarms Explained - Make it stand out Fracture swarms running obliquely into the cliff made of dolomite. Zechstein Carbonate platforms, Marsden Bay, NE England. There is also background fracturing (which is often bed-bound). https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/448614a0-1e20-4222-95b5-652def08d1a9/20_n.png Blog - Fracture Swarms Explained - Make it stand out Fracture swarm in Dalradian metasediments along Aberdeen coastal path, NE Scotland. Just over the back to the left is Aberdeen’s newest harbour at Girdleness. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/1ae629a6-aaa9-43a7-b49b-01f426c8dc74/20_4.png Blog - Fracture Swarms Explained - Make it stand out Result from a production log test (PLT) - there are 2 test results (yellow and blue data) for the same well showing that most of the flow occurs over a thin interval. https://www.ogilviegeoscience.com/blog/lavas-and-sediments-at-st-cyrus-angus-scotland monthly 0.5 2026-01-21 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/a4f76c5e-72f6-4e12-a7c2-43599314b8d0/19_1n.png Blog - Lavas and Sediments at St Cyrus, E Scotland - Make it stand out View of a sediment filled channel between 2 lobes of lava. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/6138e739-5bad-4dee-922b-2db29b94179e/Screenshot+2026-01-04+at+11.20.34.png Blog - Lavas and Sediments at St Cyrus, E Scotland - Make it stand out Drawing from Nigel Trewin’s fieldguide [1] https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/aea9899b-ea78-4519-a484-7012727e866e/19_2n.png Blog - Lavas and Sediments at St Cyrus, E Scotland - Make it stand out Fracture swarm to the right of the black lab https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/d1176e29-c52b-4907-adfd-dc408a6378e1/19_n.png Blog - Lavas and Sediments at St Cyrus, E Scotland - Make it stand out Reverse fault with sedimentary layer as a marker bed https://www.ogilviegeoscience.com/blog/clashach-quarry-hopeman-morayshire monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/6bcb2e91-575b-4084-b25a-141a325025c0/18_1.jpg Blog - Clashach Quarry, Hopeman, Morayshire - Make it stand out National museum of Scotland in Edinburgh which has cladding from Clashach Quarry https://en.wikipedia.org/wiki/National_Museum_of_Scotland#/media/File:Museum_of_Scotland.jpg https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/c6996846-1edf-438c-9c82-fbdc316a2cf4/18_2.png Blog - Clashach Quarry, Hopeman, Morayshire - Make it stand out Block of what looks like Clashach Sandstone below a chair, near a new outhouse at Pluscarden Abbey, Morayshire. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/aed2d9d8-19dd-44ea-ab87-e36327dcb8ef/18_3.png Blog - Clashach Quarry, Hopeman, Morayshire - Make it stand out Described as a travertine like deposit from a fault zone in Clashach Quarry. https://www.ogilviegeoscience.com/blog/mud-volcanoes-in-azerbaijan monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/e296e5c1-410d-4369-8bff-7b54482e38ab/LK_21_25_26_mudvolcs.png Blog - Mud Volcanoes in Azerbaijan - Make it stand out Mud Volcanoes at Gobustan, coastal Azerbaijan https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/a83079fc-e9d2-46b4-84b9-9926d5053d27/17_2.png Blog - Mud Volcanoes in Azerbaijan - Make it stand out Mud volcano about 1 m high with (on right) gas bubbling in the crater https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/a8503722-a5c0-4093-b626-ba30e9fa9b95/18_3.png Blog - Mud Volcanoes in Azerbaijan - Make it stand out Lobe shaped mud flows with desiccation cracks showing where the mud has dried out. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/f1028523-42f9-4150-a512-1abcad35f64c/18_4.png Blog - Mud Volcanoes in Azerbaijan - Make it stand out Genesis of mud volcanoes. Blue layers are reservoirs and the grey is the source rock shale which rises through pipes to the surface, forming a cone. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/93b6a9e3-4110-472c-a1da-e43095023c31/18_5.png Blog - Mud Volcanoes in Azerbaijan - Make it stand out Upper: Seismic coherency cube looking down on a Mud Volcano cone in the Apsheron Anticline, S Caspian Sea. Concentric and some radial faults can be seen by the low coherency orange areas within the grey (coherent) host rock. Source: Virtual Seismic Atlas, (Richard Davies). http://www.seismicatlas.org/entity?id=165e9535-7616-4f65-a991-30ee698d2a2f Lower: Section through a Mud Volcano in South Caspian Basin (b) Interpretation. Depositional units 1 – 4. Concentric normal faults (T), downward tapering cone (U); top of the mud volcano surface (TMV); note onlapping sediments at sides. Base of the mud volcano surface (BMV); base of the overburden surface (BOS). Source Virtual Seismic Atlas. http://www.seismicatlas.org/entity?id=b1cd4cf6-41ed-4f69-8189-edc8cc08e865 [1] Planke, S, Svenen, H, Hovland, M, Banks, D, A, Jamtveit, B. 2003. Mud and Fluid Migration in Active Mud Volcanoes, in Azerbaijan. Geoscience Marine Letters 23, 258 - 268. https://www.ogilviegeoscience.com/blog/nodules-vs-concretions monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/e77dc3dd-b8bd-412a-82df-58320a3bef5b/sept+nodules.jpg Blog - Nodules Galore - Make it stand out Septarian nodules in Lower Devonian Sandstones along Arbroath coast, E Scotland https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/5e34b02e-d70c-4a35-a265-28714433dbbc/15_1.png Blog - Nodules Galore - Make it stand out Star-like nodules of barite in the Hopeman Sandstone, Moray, UK https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/7d575eeb-58d4-4cac-abb6-2935c3d2571f/16_3.png Blog - Nodules Galore - Make it stand out Examples of nodules in North Sea cored mudstones/shales: Left carbonate nodule with related fractures - in a Central North Sea (Tertiary age) Mudstone (b) Bedding parallel dolomite concretion in Cretaceous shale in the N Sea-a lot of detail which provides insights into the geological history. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/94ec7c11-7e57-44ff-a0de-8357028dda07/concs.png Blog - Nodules Galore - Make it stand out Concretion shape and rate of deposition. Density log signature on right hand side. https://www.ogilviegeoscience.com/blog/shear-fractures-on-folds-st-andrews-e-scotland monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/74f5b32e-0b4c-4e52-bd7b-f92780227c5e/15_1n.png Blog - Shear Fractures on Folds, St Andrews, Scotland - Make it stand out Shear fractures found on sandstone beds of a fold limb with St Andews in the distance. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/90a40f43-ce2a-4db4-a589-12172a496184/15_2.png Blog - Shear Fractures on Folds, St Andrews, Scotland - Make it stand out Fracture types related to folding after work by Stearns in the late 1960s and 70s. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/ef01fb05-07af-4614-bbbf-c94957d978d2/15_3.png Blog - Shear Fractures on Folds, St Andrews, Scotland - Make it stand out Late Precambrian Bambui Group carbonates of the Sao Francisco Basin, onshore Brazil. Folded during the Cambrian. Sample and photo from Andy Racey. https://www.ogilviegeoscience.com/blog/slickenlines-and-slickenfibres monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/23482291-fc06-4384-9940-519b28646f36/14_3.png Blog - Slickenlines - Make it stand out Slickenlines in playa lake siltstones from rock core, N Sea. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/18e203c6-d0a8-499f-9abc-30c1acbe5d49/14_1.png Blog - Slickenlines - Make it stand out Slickenlined fault surface in conglomerate in Ailnack gorge, Cairngorms, Scotland. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/a216a9f9-d4dc-4709-b8f2-0d4c78f43b2f/Slicks+newlogo.png Blog - Slickenlines - Make it stand out Slickenlines and polished surface in Jurassic faulted sandstones from the North Sea. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/0e3fb20f-48bf-437b-b801-1d6746ebaa7a/14_5.png Blog - Slickenlines - Make it stand out Footwall and hanging wall of the Clashach Fault in the Hopeman Sandstone, Moray, Scotland. On the right, looking onto the fault plane with it’s rib like slickenlines running diagonally from top right to bottom left. https://www.ogilviegeoscience.com/blog/ailnack-gorge-tomintoul-scotland monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/57fb281d-e9e0-49c0-b008-d0cdda62af42/13_1n.png Blog - Ailnack Gorge Tomintoul, Scotland - Make it stand out First stop at the basal conglomerates just before the Avon crossing belonging to the (Delnabo Conglomerate Formation) which show some signs of bedding from top right to bottom left https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/18d39a1a-7750-400b-becc-8bcdf0c70212/13_4B.png Blog - Ailnack Gorge Tomintoul, Scotland - Make it stand out Quarry of fluvio-glacial sediments on way to the gorge and (right) close up of a small, relatively recent fault exposed on what are fresh exposures. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/2bdbce80-2f7e-4007-a46d-951c5a558816/13_5.png Blog - Ailnack Gorge Tomintoul, Scotland - Make it stand out Spectacular view into the gorge https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/94cfa424-512b-480a-b73b-9ed49353eecb/13_6.png Blog - Ailnack Gorge Tomintoul, Scotland - Make it stand out On way down to the gorge with views of dipping conglomerates https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/98d4599d-86d1-44cc-83e1-6fe1b40d02a7/13_1.png Blog - Ailnack Gorge Tomintoul, Scotland - Make it stand out Recumbent folding in the metamorphic rocks of the Dalradian in Ailnack Gorge. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/901dfbac-ee12-4d1e-8aba-bebb804e3309/13_7.png Blog - Ailnack Gorge Tomintoul, Scotland - Make it stand out Details of 2 stages of foliation and their relation to folding in the phyllites. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/f3da7513-3948-451c-ad91-eebf2a6a15be/IMG_1670.JPEG Blog - Ailnack Gorge Tomintoul, Scotland - Make it stand out You got to watch where you are putting your feet https://www.ogilviegeoscience.com/blog/lava-and-sediments-lunan-bay monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/b7f6104c-42cf-407c-8aa1-2553efa98446/IMG_1014.JPEG Blog - Lava and sediments, Lunan Bay - Make it stand out Looking north along the sands of Lunan Bay towards the North Headland https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/18c69fa1-156e-4d9b-901f-78740cbd3194/12_1.png Blog - Lava and sediments, Lunan Bay - Make it stand out North headlands of Lunan Bay and (right) close up of the lavas with rafts of green-grey coloured fine grained sedimentary rocks. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/9f8e049b-246b-4269-8b4d-f6aba590e892/12_2.png Blog - Lava and sediments, Lunan Bay - Make it stand out Stunning boulder of lavas mixed with sediments at North end of Lunan Bay and (right) another example of mixed lava and the distinctive green coloured fine sediment; this time from Boddin Point (which is further North of Lunan) https://www.ogilviegeoscience.com/blog/strathmore-syncline-midland-valley monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/be181b79-e383-4aa1-b58b-35536d1d8779/10_4.png Blog - Strathmore Syncline, Midland Valley, UK - Make it stand out Map showing the extent and NE-SW trend of the Strathmore Syncline - from Stonehaven on the East coast down to the Loch Lomond area (Tanner et al. 2008) https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/ebf05600-b772-411e-89ef-711f3aede775/11_1.png Blog - Strathmore Syncline, Midland Valley, UK - Make it stand out Steep beds of the Strathmore Syncline as seen from the foreshore at Cowie https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/f547b4df-3afa-4c83-b34d-4799bc486e7b/11_3.png Blog - Strathmore Syncline, Midland Valley, UK - Make it stand out View of the steep beds of the north limb of the Strathmore Syncline from Stonehaven Hill - looking Northwards. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/43f0d16f-fc46-4c50-be91-61835c4271bc/11_4.png Blog - Strathmore Syncline, Midland Valley, UK - Make it stand out Seaward view along one of the igneous dikes https://www.ogilviegeoscience.com/blog/ken-glennie-event monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/61b0b9d0-7d29-47f6-8d84-638a3ad75e81/10_1.png Blog - K.W Glennie Commemorative event - Make it stand out Fold formed by fluid escape, pointed out to me in the early 2000s by Ken Glennie https://www.ogilviegeoscience.com/blog/pebble-spotting-on-auchmithie-beach-e-scotland monthly 0.5 2026-01-13 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/ce2dae39-8943-49c6-b02a-bf8f8c2f67b5/9_2.png Blog - Pebble spotting on Auchmithie beach, E Scotland - Make it stand out Outcrop of conglomerate overlain by sandstone on Auchmithie beach, near the harbour. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/582fd2d9-eb21-4364-ae8d-2ab789562b2f/9_5.png Blog - Pebble spotting on Auchmithie beach, E Scotland - Make it stand out Some labelling of rock types for the pebbles within the conglomerate https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/9235afe4-53e6-461d-a74d-c6637096b8c4/9_1.png Blog - Pebble spotting on Auchmithie beach, E Scotland - Make it stand out Pebbles from Auchmithie beach https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/9585a056-4923-44da-b3b1-e7c109966563/9_6.png Blog - Pebble spotting on Auchmithie beach, E Scotland - Make it stand out Fracture zone in the conglomerates at Auchmithie. A close up (right) shows how some of the pebbles have been sheared (arrow) https://www.ogilviegeoscience.com/blog/tillywhandland-quarry-a-fossil-fish-locality-central-scotland monthly 0.5 2026-01-23 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/8626380a-d7d8-452b-b529-5894c0af2f0f/IMG_1098.JPEG Blog - Tillywhandland Quarry, fossil fish locality, nr Forfar, Scotland - Make it stand out Trackway (not for cars though) into the quarry. Photo taken early Nov 2025. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/0f89c7a3-bf79-4c5d-b407-c341fbf49ca3/Tilly+map.png Blog - Tillywhandland Quarry, fossil fish locality, nr Forfar, Scotland - Make it stand out Parking location for Tullywhandland Quarry to east of Forfar, NE Scotland. Dominant pinkish red colour is Dundee Flagstone Formation. https://geologyviewer.bgs.ac.uk/ https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/10b7cfa3-f8d8-4a88-94d4-febf6bcec655/fish2.png Blog - Tillywhandland Quarry, fossil fish locality, nr Forfar, Scotland - Make it stand out Spoil heap on way into quarry and (right) some fish scales (white arrows) and other parts (blue arrows) on a flagstone bedding surface https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/8b45c0b8-0d3b-4d5e-9f30-e98566cd0de6/Tilly_4.png Blog - Tillywhandland Quarry, fossil fish locality, nr Forfar, Scotland - Make it stand out View of quarry at entrance and (right) the north wall of the quarry where a small fault can be seen in the flagstones https://www.ogilviegeoscience.com/blog/calcite-filled-faults monthly 0.5 2025-12-09 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/9dd6ef24-d2ae-4376-9350-990fb1caedd8/IMG_1043.JPEG Blog - Fractured mudstones, Stanley, Perthshire, UK - Make it stand out Start of a 200 m long exposure of mudstone just down the track from the log cabin. It’s well and truly Autumn now. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/0b9be18a-c4b8-425a-9c95-e5e3ca9a392e/7_new.png Blog - Fractured mudstones, Stanley, Perthshire, UK - Make it stand out Intensely fractured mudstones on a cliff section along the path - a distinctive green stain picks out a once connected fracture network that formed well before the recent decompaction/stress relief fractures https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/7ae3b8f2-807d-4c09-b061-33c48c8be7df/7_new2.png Blog - Fractured mudstones, Stanley, Perthshire, UK - Make it stand out Networks of conjugate faults (side view of cliff) which have been displaced by slip along a bedding plane in centre of view. Andy cube for scale just below the slip plane. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/5b7ad614-9b7c-4189-9404-1b3f46e90b6f/7_7.png Blog - Fractured mudstones, Stanley, Perthshire, UK - Make it stand out Feather like structure related to a fault in the mudstone and (right) detail of calcite cements in one of the faults with pods of host rock. https://www.ogilviegeoscience.com/blog/inversion-folds-at-kilve-pill-somerset-uk monthly 0.5 2025-11-18 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/ddf3834b-5cbd-4264-bb5b-b366ef2b3aa2/7_1.png Blog - Inversion fold, Kilve Pill, Somerset, UK - Make it stand out Large inversion fold on the cliffs at Kilve Pill, Somerset coast. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/f5c3739a-70fd-46a5-ac30-e89cc1f6d3c0/6_1.png Blog - Inversion fold, Kilve Pill, Somerset, UK - Make it stand out Various steps in creation of inversion structures - modified from some work by… https://www.ogilviegeoscience.com/blog/andesite-lavas-kinnoull-hill-perth-uk monthly 0.5 2025-11-10 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/f97a26c7-b6bb-4193-b050-ae1390c2c4d7/IMG_1074.JPEG Blog - Andesite lava, Kinnoull Hill, Perth, UK - Make it stand out Kinnoull Tower on the approach from the 2nd viewpoint https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/5857d093-334f-4594-b938-63f010a100b1/Filmore_5_view.png Blog - Andesite lava, Kinnoull Hill, Perth, UK - Make it stand out Path on way up Kinnoull Hill and the 1st (not very good) viewpoint https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/21552dff-31c6-471f-82d0-a8cbf69b1627/filmore_5_hill.png Blog - Andesite lava, Kinnoull Hill, Perth, UK - Make it stand out Warning of a sheer vertical drop with River Tay in background and (on the right) a view (to the west) of stacked lavas on the steep cliff faces, from the tower https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/5a5ef740-6daf-467b-8fc2-0795f9af0112/tower+itself.png Blog - Andesite lava, Kinnoull Hill, Perth, UK - Make it stand out Kinnoull Tower and outcrop of eroded andesite lavas with crumbly, brecciated appearance at front of the tower. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/870c2d3e-89fe-4b26-8850-f13f592d0fd8/IMG_1088.JPEG Blog - Andesite lava, Kinnoull Hill, Perth, UK - Make it stand out Another view of the andesite lava in front of the tower https://www.ogilviegeoscience.com/blog/andersons-model-of-faulting-moray-coast monthly 0.5 2025-11-20 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/7cbf3a90-66e1-4866-96b3-4b7e8cdbe173/72_1.png Blog - Anderson’s model of faulting, Moray Coast - Make it stand out Fault classification based upon relative movement of hanging wall to footwall. Thicker red arrows mean higher value of principle stress. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/16a3b0f7-ab03-4aba-83ca-51b657daf778/72_2n.png Blog - Anderson’s model of faulting, Moray Coast - Make it stand out Facing East along a zone of crossing faults in outcrop (Hopeman Sandstone, UK). Note compound zone of deformation bands (dashed line) in the foreground. Anderson’s model shown on the right. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/014c2fc9-fef9-42b7-b40c-1e5ae2d5a868/Filmore_Anderson_Aberdour.png Blog - Anderson’s model of faulting, Moray Coast - Make it stand out Conjugate set of normal faults in the Old Red Sandstone at New Aberdour, Morayshire, Scotland https://www.ogilviegeoscience.com/blog/triassic-river-sandstones-burghead-scotland monthly 0.5 2025-11-05 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/8e5f9e86-02f2-49a9-a2ec-719c1e83093e/burg+combined.png Blog - Triassic river sandstones, Burghead, Scotland - Make it stand out The Burghead beds are Triassic age sandstones forming part of the harbour wall just down from the pictish fort visitor centre car park. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/0fc4c1f2-cda0-414d-aa5f-8e9cf16c8047/LK_30_10_b.png Blog - Triassic river sandstones, Burghead, Scotland - Make it stand out Exposure of the Burghead Beds along the old railway line at Cummingstown. Compass for scale. https://www.ogilviegeoscience.com/blog/deformation-bands-arran-scotland monthly 0.5 2025-11-05 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/8fd1fc64-5f3a-4547-9266-36425e247619/17_2.jpg Blog - Deformation bands, Arran, Scotland - Make it stand out Network of deformation bands in Permian sandstones on Corrie shore, Arran https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/a2ceebd5-cf78-4c4e-b071-539833178e0d/17_3.jpg Blog - Deformation bands, Arran, Scotland - Make it stand out When the deformation bands come together they create raised bumps that are resistant to erosion https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/b2a51844-770f-4b5b-a27b-b596c3a31792/17_4.jpg Blog - Deformation bands, Arran, Scotland - Make it stand out Nodular cements (possibly barite) related to deformation bands - note how the cement thickens up close to individual deformation bands in some areas but in others the band is barren of cements. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/493ba159-6f3e-4faf-a5d8-9a12dc973402/17_5.jpg Blog - Deformation bands, Arran, Scotland - Make it stand out Left-lateral component of displacement between 2 deformation band sets. https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/daac8bf3-d59e-4a2d-a2af-14cacd426e2f/17_6.jpg Blog - Deformation bands, Arran, Scotland - Make it stand out Dolerite ? dyke intrusion. Baked margin along the yellow moss line. https://www.ogilviegeoscience.com/blog/limestones-at-boddin-point monthly 0.5 2025-11-08 https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/4e81d96d-3303-440f-89cf-cde491d51635/IMG_0995.JPEG Blog - Limekiln and Geology at Boddin Point - Make it stand out The 18th century limeworks on Boddin point with the limestones in the foreground https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/e9d4a949-7c79-44f1-ab2c-6c787a65f262/IMG_0991.JPEG Blog - Limekiln and Geology at Boddin Point - Make it stand out Well defined cross beds in the Kinnesswood Formation sandstones on the south side of Boddin Point https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/f141de8c-9bad-4f78-b785-6949a50b7808/IMG_1003.JPEG Blog - Limekiln and Geology at Boddin Point - Make it stand out Polygonal joints in the andesite lavas next to the fault that separates them from the Kinnesswood Formation https://images.squarespace-cdn.com/content/v1/68f78d25bea39a1c5aa73a37/fe4facc3-cf19-442d-bd14-45a242e352db/Figure+80n.jpg Blog - Limekiln and Geology at Boddin Point - Make it stand out Oldish outbuilding with roof mainly made of flagstone, patched up with at least 3 slates https://www.ogilviegeoscience.com/blog/category/Syncline monthly 0.5 https://www.ogilviegeoscience.com/blog/category/Metamorphic+rocks monthly 0.5 https://www.ogilviegeoscience.com/blog/category/Permian monthly 0.5 https://www.ogilviegeoscience.com/blog/category/Aberdeen monthly 0.5 https://www.ogilviegeoscience.com/blog/category/Aberdour monthly 0.5 https://www.ogilviegeoscience.com/blog/category/Limestone monthly 0.5 https://www.ogilviegeoscience.com/blog/category/Mudstones monthly 0.5 https://www.ogilviegeoscience.com/blog/category/Concretions monthly 0.5 https://www.ogilviegeoscience.com/blog/category/Fluvial monthly 0.5 https://www.ogilviegeoscience.com/blog/category/Strathmore monthly 0.5 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