granitic gneiss - All Posts
On the Rocks – A Day at Nottoway Falls
On October 7, 2016
![In this photo an older biotite-rich gneissic inclusion is surrounded by the younger granitic gneiss. Both rocks are strongly lineated (oriented NE to SW). Strain is heterogenous as evidenced by the deflection of the biotite-rich gneiss in a cryptic high-strain zone. The asymmetry and offset along the discrete fault is consistent with right-lateral (dextral shear). There is geological craziness at the far end of the biotite-rich gneiss.](https://wmblogs.wm.edu/wp-content/uploads/2016/10/NewNottoFig4-280x190.jpg)
In August, I described a set of cascades that form a major knickpoint on the Nottoway River in the Southside Virginia Piedmont. Last Saturday,
Knickpoint on the Nottoway
On August 24, 2016
![an elevation map of Nottoway falls and nottoway river](https://wmblogs.wm.edu/wp-content/uploads/2016/08/NottowayThumbnail-280x190.jpg)
Deep in the heart of Southside Virginia lies a bedrock outcrop of tremendous size. Quality outcrops are rare in the Piedmont, but between the