It consists mainly of sandstones, but these are often thin-bedded and pass into shales.
A wonderful series of these forms occurs in southern Utah, where in passing northward from the Carboniferous platform one ascends in succession the Vermilion Cliffs (Triassic sandstones), the ViThite Cliffs (Jurassic sandstones, of remarkably cross-bedded structure, interpreted the dunes of an ancient desert), and finally the Pink Cliffs (Eocene strata of fluviatile and lacustrine origin) of the high, forested plateaus.
Using the extra sand, they made fortifications and bedded down for the night behind them.
Molly was already bedded down for the night.
In spite of gaining two hours with the time change, it was still late when the cross-country travelers finally bedded down in a quiet motel in Golden, Colorado, after a shared ride from the Denver airport.