Figure 10a. Crag-and-tail feature; the white quartz vein is more resistant to erosion than the gray bedrock and stands up as a knob (crag) lessening the erosion of the bedrock in the lee of the quartz knob. Ice flow was from right to left. Striations on bedrock surface to left of quartz trend 145-degrees and are the oldest and dominant set on the pavement.
Last updated on October 6, 2005