The Skippers Pluton


Finding bedrock outcrop in the Piedmont of Southside Virginia can be challenging.  Much of the terrain is covered by soil and saprolite, and geologists interested in this region must search high and low for outcrop.  The image above illustrates a ‘good’ natural outcrop in the Piedmont, likely the result of a relatively resistant rock that […]

Chopawamsic Gneiss


This exposure in a pasture near Cuckoo exposes a poly-deformed hornblende and plagioclase-rich gneiss. Foliation in the gneiss has been refolded.  Another interesting feature is the presence of garbenschiefer or “feather amphibolite.” This unusual texture is defined by stellate and featherlike hornblende clusters in the plane of foliation. Three amphibole species occur in this rock […]