Callan Bentley

AMS Climate briefing rundown

by

Yesterday I attended a climate change briefing hosted by the American Meteorological Society (in conjunction with NSF, AGU, AAAS, and the American Statistical Association). It was in the Hart Senate Office Building, but I didn’t see any senators at the briefing. It was an interesting format: 3 talented speakers giving 3 “fifteen-minute” presentations (really more … Read more

Folds of New York

by

Thursday is ‘fold day’ here at Mountain Beltway. Let’s take a look at some folds I saw last weekend in New York City. We’ll start with a bunch seen in the Manhattan Schist in Central Park. Here’s an example of the foliation in the schist. It’s got finer-grained regions and coarser, schistier regions with big … Read more

Pyrolusite on a pterosaur

by

All the photos I posted over the weekend here were via iPhone, and hence not particularly high-quality, despite their excellent geological content. Now I’ve downloaded the photos from my real camera, and have a few good ones to show. Here’s a succession of photos of the same specimen of Pterodactylus longirostrus, each progressively more zoomed … Read more

Emriver in action

by

Today, a few photos of my spring Environmental Geology class doing a New Orleans Case Study lab using our lovely Emriver river process simulator: That’s it. I mainly shot these photos for Steve Gough, as NOVA is participating in the new grant he submitted to NSF, but I figured I would share them here, too. … Read more

When the Sturtian happened

by

Last Friday, I spent the evening riding up to New York on a bus. To pass the time, I had my iPod and a new paper by Francis Macdonald and colleagues in Science. The paper examines the timing of one of the episodes of “Snowball Earth” glaciation. There’s some important new data in this paper, … Read more