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
Acadia Cliffs State Nature Preserve Acadia Cliffs State Nature Preserve Acadia Cliffs State Nature Preserve is a state nature preserve in Washington County, Ohio, United States, with a small neck extending into Athens County, Ohio. Covering an area of , it was founded in 1994. It is known for its sandstone cliffs. For a time, it was administered by the Ohio State Division of Wildlife, but is now administered by the Ohio Division of Nature Preserves. The nature preserve is close to the Washington-Athens County border. The preserve centers on Beebe Road, which may be reached from Ohio State Route 144 east of Stewart, Ohio.