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6 April 2017

Stac Fada

The evidence for a meteorite impact origin for the Stoer Group’s Stac Fada member seems to stack up. Engage in a virtual field investigation on Mountain Beltway.


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3 March 2014

Pieces of the beginning, via Chelyabinsk

A week ago today, I was in Tempe, Arizona, at Arizona State University, for a workshop on broadening participation (increasing diversity) in the geosciences. One of the neat things about ASU as a setting for this meeting is their enormous meteorite collection. I was particularly taken with the display of material from the extraordinary Chelyabinsk meteor detonation that occurred last year. ASU has pieces of glass from windows that were …


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3 January 2011

Four books on time

Callan reviews four books about geologic time.


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