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1 December 2015
When snail shells are deposited in a bunch of sediment, they serve as tiny architectural elements, with a “roof” that protects their interiors. Any sediment mixed into the shell’s interior will settle out (more or less horizontally), and then there will be empty space (filled with water, probably) above that. As burial proceeds and diagenesis begins, that pore space may be filled with a mineral deposit, such as sparry calcite. …
18 November 2015
You could use a macro GigaPan of some pretty sand, I think. Link That’s sand from near Acadia National Park, in Maine. Exploring it, you can find both small chunks of Acadian granite, and green rods that are sea urchin spines. It’s fun – check it out.
27 October 2015
My Historical Geology class was in for a new experience for the semester’s capstone field trip. Before we headed out into the field (to the exceptional roadcuts along Corridor H in Grant and Hardy Counties, West Virginia), we had them examine all the outcrops virtually, in the comfort of the classroom, using digital imagery. I say “we” because this initiative was a collaboration with my colleague Alan Pitts, who developed …
21 October 2015
One of the cool things about my plan for the GEODE grant from NSF is to put GigaPan imaging systems in the hands of people who will take them to cool places. I purchased five loaner GigaPan rigs, and they have gone out in the field with various people, but I think that the images I will show you today are the coolest we’ve yet produced. All seven of them …
13 October 2015
Great news – I have been awarded a great professorship for the next two years. The Chancellor’s Commonwealth Professorship is a great honor and a major investment by the Virginia Community College System in me and my GigaPan project. I get course release time, a summer stipend, and reimbursable expenses of around $7500. I intend to use that money and that time to do a major GigaPan expedition in Europe …
12 October 2015
I’ve been thinking lately about Harpers Ferry, the spot where West Virginia, Virginia, and Maryland meet, at the confluence of the Potomac River and the Shenandoah River. I’ve noted small outcrops of its overturned beddding here previously, and also described a book I read about the man who made the place infamous: John Brown. I went out there again last week with my NOVA colleague Beth Doyle, and we explored …
25 September 2015
I don’t think I’ve featured this sample here before… It’s a lovely gneiss from near the trailhead for the Spanish Peaks, near Ted Turner’s Ranch in the Gallatin/Madison Range in southern Montana, not too far from Big Sky. Have fun checking it out in this macro GigaPan: link Happy Friday to all.
22 September 2015
New LiDAR imagery for the Fort Valley reveals bedrock structures and subtle aspects of fluvial geomorphology.
12 September 2015
Hampshire Formation outcrops on Corridor H, West Virginia: link (Marissa Dudek) link (Callan Bentley) Faults in the Tonoloway Formation, Corridor H, West Virginia: link (Marissa Dudek) Conococheague Formation, showing stromatolites and cross-bedding: link (Callan Bentley) link (Jeffrey Rollins) Tiny folds and faults, from a sample I collected somewhere, sometime… oh well, it’s cool regardless: link (Robin Rohrback-Schiavone) Fern fossil in Llewellyn Formation, St. Clair, Pennsylvania: link (Robin Rohrback-Schiavone) Cross-bedding in …
14 August 2015
The answer to this week’s geological interpretation contest is revealed, sort of. Annotations, GigaPans, and outcrop detail photos reveal the story of equatorial fluvial incision and ancient slumping during the Carboniferous ice ages.