Today we beheld The Roadcut
April 3, 2026 at 5:20 AM
Today we beheld The Roadcut
Saw this enormous centipede at the Bell Canyon Fm roadcut... 👀
October 17, 2025 at 9:34 PM
Saw this enormous centipede at the Bell Canyon Fm roadcut... 👀
Layers of time.
Roadcut bisecting Hubbard Park.
Roadcut bisecting Hubbard Park.
January 19, 2026 at 8:20 PM
Layers of time.
Roadcut bisecting Hubbard Park.
Roadcut bisecting Hubbard Park.
Roadcut rock sheeted with ice. Haddam to Route 9. Feels like rain (not snow) on the way.
January 9, 2026 at 10:28 PM
Roadcut rock sheeted with ice. Haddam to Route 9. Feels like rain (not snow) on the way.
Geologists on the bus be like ⚒️
November 25, 2023 at 5:19 PM
Geologists on the bus be like ⚒️
We stopped at a spot to check for fossils in Kentucky. Instead, there were these iron-heavy nodules eroding out of a shale roadcut. I found several busted ones, but this one had pyrite inside! Hopefully some of the ones I collected will, too! #rockhounding
June 18, 2026 at 6:59 PM
We stopped at a spot to check for fossils in Kentucky. Instead, there were these iron-heavy nodules eroding out of a shale roadcut. I found several busted ones, but this one had pyrite inside! Hopefully some of the ones I collected will, too! #rockhounding
www.mineralcollection.eu/product/2344...
Ankerite pseudomorph after dolomite in quartz geode from the State Route 37 roadcut, Harrodsburg, Indiana, USA
3.5 cm x 3.2 cm excl. box
37 gram incl. box
€ 25
#ankerite #carbonates #roadcut #indianaminerals #usaminerals #minerals #rocks #crystals #stones
Ankerite pseudomorph after dolomite in quartz geode from the State Route 37 roadcut, Harrodsburg, Indiana, USA
3.5 cm x 3.2 cm excl. box
37 gram incl. box
€ 25
#ankerite #carbonates #roadcut #indianaminerals #usaminerals #minerals #rocks #crystals #stones
June 20, 2026 at 11:20 AM
www.mineralcollection.eu/product/2344...
Ankerite pseudomorph after dolomite in quartz geode from the State Route 37 roadcut, Harrodsburg, Indiana, USA
3.5 cm x 3.2 cm excl. box
37 gram incl. box
€ 25
#ankerite #carbonates #roadcut #indianaminerals #usaminerals #minerals #rocks #crystals #stones
Ankerite pseudomorph after dolomite in quartz geode from the State Route 37 roadcut, Harrodsburg, Indiana, USA
3.5 cm x 3.2 cm excl. box
37 gram incl. box
€ 25
#ankerite #carbonates #roadcut #indianaminerals #usaminerals #minerals #rocks #crystals #stones
I'm bummed that they've covered up the roadcut where the 405 and the 5 meet.
I get that this is important for slope hazards, but that roadcut exposed part of the 1971 M6.6 San Fernando/Sylmar rupture!
I get that this is important for slope hazards, but that roadcut exposed part of the 1971 M6.6 San Fernando/Sylmar rupture!
July 24, 2024 at 12:22 AM
I'm bummed that they've covered up the roadcut where the 405 and the 5 meet.
I get that this is important for slope hazards, but that roadcut exposed part of the 1971 M6.6 San Fernando/Sylmar rupture!
I get that this is important for slope hazards, but that roadcut exposed part of the 1971 M6.6 San Fernando/Sylmar rupture!
𝘿𝙧𝙖𝙢𝙖 𝙞𝙣 𝙩𝙝𝙚 𝙧𝙤𝙘𝙠𝙨!
Evidence of an ugly-big submarine landslide in the Permian: Blocks (some >5m long!) of gray reef limestone (shallow water) in deep-water (yellow/tan) sandstone of the Bell Canyon Fm.
More photos of the roadcut in this 2014 blog post: mountainbeltway.all-geo.org/2014/07/03/b...
⚒️
Evidence of an ugly-big submarine landslide in the Permian: Blocks (some >5m long!) of gray reef limestone (shallow water) in deep-water (yellow/tan) sandstone of the Bell Canyon Fm.
More photos of the roadcut in this 2014 blog post: mountainbeltway.all-geo.org/2014/07/03/b...
⚒️
October 22, 2025 at 10:57 AM
𝘿𝙧𝙖𝙢𝙖 𝙞𝙣 𝙩𝙝𝙚 𝙧𝙤𝙘𝙠𝙨!
Evidence of an ugly-big submarine landslide in the Permian: Blocks (some >5m long!) of gray reef limestone (shallow water) in deep-water (yellow/tan) sandstone of the Bell Canyon Fm.
More photos of the roadcut in this 2014 blog post: mountainbeltway.all-geo.org/2014/07/03/b...
⚒️
Evidence of an ugly-big submarine landslide in the Permian: Blocks (some >5m long!) of gray reef limestone (shallow water) in deep-water (yellow/tan) sandstone of the Bell Canyon Fm.
More photos of the roadcut in this 2014 blog post: mountainbeltway.all-geo.org/2014/07/03/b...
⚒️
In Santa Clarita on the Sierra Highway there is this one roadcut with a 1-2ft thick layer of a white material. I’ve been wondering for years what it is. It’s in the late Pliocene/early Pleistocene Saugus Formation, Sunshine Ranch member, but doesn’t match any other strata of it.
April 18, 2026 at 6:44 PM
In Santa Clarita on the Sierra Highway there is this one roadcut with a 1-2ft thick layer of a white material. I’ve been wondering for years what it is. It’s in the late Pliocene/early Pleistocene Saugus Formation, Sunshine Ranch member, but doesn’t match any other strata of it.
Hey, it’s the San Gabriel Fault, visible up near the intersection of Sierra Highway and Golden Valley in Santa Clarita.
June 19, 2025 at 5:40 PM
Hey, it’s the San Gabriel Fault, visible up near the intersection of Sierra Highway and Golden Valley in Santa Clarita.
The Sideling Hill roadcut in western Maryland is a textbook example of a syncline. Here the sedimentary rock bedding has been folded into a U-shape by compressive tectonic forces. The corresponding A-shaped anticlines on either side have been eroded away. I-68 west of Hancock Maryland, 02 Nov 2010.
April 25, 2025 at 10:21 PM
The Sideling Hill roadcut in western Maryland is a textbook example of a syncline. Here the sedimentary rock bedding has been folded into a U-shape by compressive tectonic forces. The corresponding A-shaped anticlines on either side have been eroded away. I-68 west of Hancock Maryland, 02 Nov 2010.
May 29, 2025 at 9:58 AM
photos of turbidites from the famous Peira Cava exposure of the Eocene Annot Sandstone (~40 km north of Nice, France) — these rocks are 'famous' because this is the area and formation where Arnold Bouma did his studies in the late 1950s/early 1960s ⚒️
January 29, 2025 at 1:56 PM
photos of turbidites from the famous Peira Cava exposure of the Eocene Annot Sandstone (~40 km north of Nice, France) — these rocks are 'famous' because this is the area and formation where Arnold Bouma did his studies in the late 1950s/early 1960s ⚒️
Can concur. This is a very good roadcut about 90 minutes from me.
Drove by it a couple weeks ago.
It’s a very good roadcut.
Drove by it a couple weeks ago.
It’s a very good roadcut.
April 3, 2026 at 5:24 AM
Can concur. This is a very good roadcut about 90 minutes from me.
Drove by it a couple weeks ago.
It’s a very good roadcut.
Drove by it a couple weeks ago.
It’s a very good roadcut.
The Sideling Hill roadcut in western Maryland is a textbook example of a syncline. Here the sedimentary rock bedding has been folded into a U-shape by compressive tectonic forces. The corresponding A-shaped anticlines on either side have been eroded away. I-68 west of Hancock Maryland, 02 Nov 2010.
February 16, 2026 at 5:19 PM
The Sideling Hill roadcut in western Maryland is a textbook example of a syncline. Here the sedimentary rock bedding has been folded into a U-shape by compressive tectonic forces. The corresponding A-shaped anticlines on either side have been eroded away. I-68 west of Hancock Maryland, 02 Nov 2010.
I have some very similar examples from the roadcut at Waddell.
January 4, 2026 at 3:49 AM
I have some very similar examples from the roadcut at Waddell.
I pulled it from a roadcut on Sand Canyon Road/Little Tujunga Canyon Road near Santa Clarita (Los Angeles County).
June 28, 2025 at 3:40 AM
I pulled it from a roadcut on Sand Canyon Road/Little Tujunga Canyon Road near Santa Clarita (Los Angeles County).
I have sad reasons to review some nice book passages this week. Here’s one that always reminds me of being ridiculed for shouting “look at that rock!” far too often on many road trips…
John McPhee, Basin and Range (1980)
John McPhee, Basin and Range (1980)
January 29, 2025 at 11:25 AM
I have sad reasons to review some nice book passages this week. Here’s one that always reminds me of being ridiculed for shouting “look at that rock!” far too often on many road trips…
John McPhee, Basin and Range (1980)
John McPhee, Basin and Range (1980)
The Sideling Hill roadcut in western Maryland is a textbook example of a syncline. Here the sedimentary rock bedding has been folded into a U-shape by compressive tectonic forces. The corresponding A-shaped anticlines on either side have been eroded away. I-68 west of Hancock Maryland, 02 Nov 2010.
August 19, 2025 at 4:57 PM
The Sideling Hill roadcut in western Maryland is a textbook example of a syncline. Here the sedimentary rock bedding has been folded into a U-shape by compressive tectonic forces. The corresponding A-shaped anticlines on either side have been eroded away. I-68 west of Hancock Maryland, 02 Nov 2010.
If you find the right roadcut, you can see bikes on dikes.
April 23, 2024 at 7:08 PM
If you find the right roadcut, you can see bikes on dikes.
I mean… look at this rock
September 22, 2024 at 6:05 PM
I mean… look at this rock
Wonderful normal faults visible along a roadcut just outside of Moab. The structures are related to the emplacement and collapse of a salt diaper.
#nature #geology #normalfault #notmyfault #moab #utah #blueskyphotography
#nature #geology #normalfault #notmyfault #moab #utah #blueskyphotography
April 26, 2025 at 4:10 PM
Wonderful normal faults visible along a roadcut just outside of Moab. The structures are related to the emplacement and collapse of a salt diaper.
#nature #geology #normalfault #notmyfault #moab #utah #blueskyphotography
#nature #geology #normalfault #notmyfault #moab #utah #blueskyphotography
Nice photo. I need to plan a stop at that roadcut some day. Always in a rush to get to Black Rock (I do rocketry).
October 1, 2026 at 5:13 PM
Nice photo. I need to plan a stop at that roadcut some day. Always in a rush to get to Black Rock (I do rocketry).
This #fossilfriday , I wanted to post a very classic Pittsburgh fossil. This is Fedexia striegeli. It’s known from only one specimen (shown here) that was collected during a geology field trip to a roadcut near Pittsburgh in 2004. I credit it as the specimen that made me interested in local verts!
October 24, 2025 at 11:18 PM
This #fossilfriday , I wanted to post a very classic Pittsburgh fossil. This is Fedexia striegeli. It’s known from only one specimen (shown here) that was collected during a geology field trip to a roadcut near Pittsburgh in 2004. I credit it as the specimen that made me interested in local verts!