Description: Fruitland Formation
The Fruitland Formation is a sedimentary geological formation containing layers of sandstone, shale, and coal. It was laid down in marshy delta conditions, with poor drainage and frequent flooding, under a warm, humid and seasonal climate. It is dated from the late Campanian (part of the Cretaceous period [83.5 to 70.6 million years ago] ), and is found in the San Juan Basin in the states of New Mexico and Colorado, in the United States of America."
-- From wikipedia.org