ClipArt ETC
"Map and section of trap ridges near Woodbury. The topography is indicated by sketched contours, with hachures for trap bluffs. The lower sandstone slopes are all covered, and the northern bluff of the western group of ridges is quite buried in drift. The crystalline rocks appear on the east. The section suggests an interpretation of the surface forms." -Walcott, 1901

Trap Ridges

"Map and section of trap ridges near Woodbury. The topography is indicated by sketched contours, with…