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The Geology Letter: Dispatches from Deep Time

Jim Kling

The rocks reveal a former world. This Substack tells their stories.

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Artwork for The Geology Letter: Dispatches from Deep Time

Latest Issues

Big City Rocks

Manhattan Schist forms Overlook Rock in Central Park. You can readily see schist layers and some deformation along the bottom of the image.

Walking around Manhattan’s Central Park, if you have any interest in geology, you can’t miss the ou...

a month ago
4

A Volcano's Crystalline Interior

Interested in using work from The Geology Letter for education purposes? You’re free to do so, but I ask that you let me know about it, and that you credit me and link back to the newsletter.

Volcanic deposits from Mount Saint Helens. Pho...

2 months ago
2

Are River Valley Landslides Predictable?

Figure 1. Aerial photo of the escarpment of the Oso landslide. Credit: Air Support Unit, King County Sheriff's Office. Public domain.)

Some 17,000 years ago, the massive Cordilleran ice sheet looming over the Pacific Northwest began the re...

3 months ago

Polished Stone and Ancient Tropics

Slickensides always confused me a bit. They’re polished surfaces on a rock where stones slid past one another. I understood the concept that rock could polish rock, but in my head the faults involved would be large.

I viewed the below duri...

3 months ago
1

Of Lakes and Earthquakes

This article is just a sample of some of the findings from a recent review paper. To learn more, head over to Earth-Science Reviews, where it is open access.

Thanks for reading The Geology Letter: Dispatches from Deep Time! Subscribe for f...

7 months ago
3

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