Nacimiento Formation Nacimiento Formation The Nacimiento Formation is a sedimentary rock formation found in the San Juan Basin of western New Mexico (United States) and named for the Nacimiento Mountains. It is a heterogeneous nonmarine formation composed of shale, siltstone, and sandstone, deposited in floodplain, fluvial and lacustrine settings, and made up of sediment shed from the San Juan uplift to the north and the Brazos-Sangre de Cristo uplift to the east. It was deposited mostly between ~64.5 and ~61 million years ago, during the early and middle Paleocene. The climate was humid and warm to hot. This unit interbeds with the
Duckbill (rock formation) you have to intentionally move the wires aside and crawl through it." The vandals were not caught. Duckbill (rock formation) Duckbill was a sandstone hoodoo rock formation at Cape Kiwanda State Natural Area, in the U.S. state of Oregon. The formation served as a tourist attraction along the Oregon Coast and was photographed frequently prior to being toppled by vandals on August 29, 2016. The group that toppled the rock asserted that it was a safety hazard because a friend of theirs had broken a leg on the rock formation. Chris Havel, Oregon Parks and Recreation Department associate director, noted