Day #102 Deskcrop: Ellsworth Schist

Tax week has been a pretty busy one for me with grading and other meatspace commitments. As I catch up on Deskcrops for the week there’s a theme that geologists will recognize that relates to an earlier blog post. Nuf said. ;-)

I’m kicking the week off in the chlorite zone. Today’s deskcrop is Ellsworth Schist, a Cambro-Ordovician rock unit cropping out in coastal Maine near Mount Desert Island. This rock unit has experienced quite a bit of deformation but appears to have only been heated to a point such that chlorite is the highest grade metamorphic index mineral present.

Tomorrow we’ll visit the biotite zone…

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Ellsworth Schist – Chlorite Zone

Explore this and all of my 2010 Deskcrops and Outcrops in Google Earth!