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
Waitabit Cliffs Waitabit Cliffs Waitabit Cliffs () is a line of sedimentary cliffs on the east coast of Alexander Island, Antarctica, which faces east onto George VI Sound and extends 3 nautical miles (6 km) north from the mouth of Mercury Glacier. The cliffs were probably first sighted by Lincoln Ellsworth, who flew directly over it and photographed segments of this coast on November 23, 1935. First roughly surveyed in 1936 by the British Graham Land Expedition. Resurveyed in 1949 by the Falkland Islands Dependencies Survey, at which time the rock strata were independently examined by members of the party at two