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30 November 2022

Ichnoanalogue

Another glimpse of sand on the beach at Esterillos Oeste, Costa Rica… This time, I offer you a trace of an organism moving through the wet sediment: Note the two parallel lines of tracks laid down by little feet, and the central groove that overprints them. It reminded me very much of this similar arrangement, from near St. Andrews in Scotland, but: (1) this is the underside of a bed …

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28 November 2022

Getting ripped

Patterns in the sand on a beach in Costa Rica…

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8 September 2017

Big earthquake in southwestern Mexico, M8.1

The M8.1 southwestern Mexico earthquake is discussed and placed in context.

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22 February 2010

Pacaya Volcano, Guatemala

Today, some photographs from Guatemala. I know one of my geoblogopeers is down in Guatemala doing research, so I’ll be interested to hear her take on these photos. These photos all come to us courtesy of my friend Courtney, who is a librarian at M.I.T., and a fellow M.S.-graduate of the University of Maryland geology department. She shared these images with me about a year ago, and I intended to …

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