Brazos Mountains to 55 million years ago during the Laramide orogeny. To the east and northeast lie the Sangre de Cristo Mountains which share a similar geological history. The Brazos Cliffs, which form a dramatic backdrop to Tierra Amarilla, are formed of Precambrian quartzite. Brazos Mountains The Brazos Mountains is a range in far northern Rio Arriba County, in northern New Mexico in the southwestern United States. A high crest runs from the border with Colorado for over in a south-southeasterly direction. The high point of the range at is on Grouse Mesa, at the Brazos Benchmark. Two miles (3 km) to
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