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You are browsing the archive for 2011 March 17.

17 March 2011

Mount Washington 3: turbidites and their metamorphism

After my cousin Brad caught up with us after our Pinkham Notch roadcut excursion, we started up the trail at Tuckerman Ravine, and then detoured to go via the Lion Head. Immediately, we began to see some freaking awesome metamorphic porphyroblasts. During the Acadian Orogeny (in the late Devonian), the original muds and sands (deep sea turbidite deposits) of the Littleton Formation were metamorphosed. Pale-pink andalusite formed (that’s where these …

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