Sunday, November 17, 2013

Of granodiorite and conglomerates

Glacial erratics in the Williamsburg woods

A two stop visit. The first took me to the land of Williamsburg Granodiorite and schists intermingled with quartz and occasional bits of pegmatite. This was a geology hike and field trip put on by the Williamsburg Woodland Trails

A lot covered glacial geology (kame terraces amongst the features seen) but a healthy amount of those schists, with quartz, along with granodiorite was to be found. According to local bedrock geo maps, some marble is around but not in this immediate vicinity. Unfortunately, our hike fell upon the extreme northwest sections of the Easthampton Quadrangle and, to the best of my knowledge, no bedrock geology map was ever produced for this quad. Normally there would have been some fine views (indeed - the name of the trail is "Big View") but VERY gray, overcast, and drizzly conditions were the order of the day.

Finishing up, I continued over to the Connecticut Valley if only for a brief trip to work on my old project involving antique photography of rocky formations. Two more old stereoviews came into my possession and it was my goal to set up "Then & Now" views. With that accomplished, a leisurely bit of time was spent looking into fallen blocks of conglomerate rock that had formed a small cave. Probably that mentioned by famed geologist Hitchcock and probably the 'lost' Wild Cat Den.

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