Figure 4. Garnet monzogranite (
Ygt, 1070 Ma) showing gneissic foliation defining Grenvillian folds. Outcrop is along U.S. Route 340, northeast of Sandy Hook, Md., near the garnet graphite gneiss (
Yp) (pl. 1). Specular flakes of graphite in this plutonic rock suggest that it assimilated the paragneiss. Lens cover is 5 cm in diameter.
