Garry has decided to post a bit about columnar basalts this week & has noticed a trend of a few other bloggers joining in, so I decided to join the party.
Back in Fall 2009, Callan and I went on a joint field trip to Shenandoah National Park (somewhere he’s posted about quite a bit). One of the stops was to see a grouping of columnar basalts:
columnar basalts along the Limberlost Trail in Shenandoah (Callan standing on column w/ head chopped off)
Instead of the equant shape typically seem looking down the columns, there was some definite deformation that occurred post-emplacement:
Interestingly enough, while standing on the outcrop Callan commented that he and Kim had had a discussion about the deformation of these rocks. Considering that Kim was my undergrad advisor (something Callan didn’t know), the blogosphere is a small world 🙂
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