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You are browsing the archive for 2012 January 30.

30 January 2012

Brallier cross-beds

More evidence of currents in the Devonian deep… Primary structures that give us clues, preserved in a place where preservation over 360 million years isn’t necessarily guaranteed. As you might expect, this turbidity currents roared in from the east, where the mountains were rising, and generating a fair bit of sand and mud, during the Acadian Orogeny. (The view in this photo is looking towards the south.)

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