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The Huckleberry Ridge Tuff crops out at the top of the distant ridge on the south side dipping toward the south. It unconformably overlies Paleozoic sedimentary rocks that dip northward, forming an angular unconformity. The Huckleberry Ridge Tuff was deposited in horizontal sheets just 2.1 million years ago as a resu...
This GigaPan is a detail of the Taconic Angular Unconformity exposed near the east end of the roadcut illustrated in the GigaPan of the Lower Helderberg Group (). The Ordovician Austin Glen Formation (flysch, right) lies below the angular unconformity and the Silurian Rondout formation constitutes the relatively more ...