2 December 2022
Friday fold: Hidden Rock Park, Goochland County
Posted by Callan Bentley
Two weeks ago was the annual Virginia Geological Field Conference, which was centered this year on the Goochland Terrane, an interesting block of crust in the Piedmont which shows some similarities to the Blue Ridge geologic province, but also shows some differences that suggest it’s not just a mini-Blue-Ridge. One of the best exposures was in Hidden Rock Park, where a series of “whaleback” outcrops expose things like this:
There, a granite dike cuts through a gneiss, and then that granite dike is folded and boudinaged. Annotated:
Are there mor boudins on the “left” side of the “Z-fold” exposure? I enjoy your posts. Thanks.
Not quite so many, nor so well exposed.