Geology of the Mount Wilson quadrangle, western San Juan Mountains, Colorado : a bedded sequence of volcanic and sedimentary rocks more than 5,000 feet thick has been intruded by stocks and laccoliths
"A bedded sequence of volcanic and sedimentary rocks more than 5,000 feet thick has been intruded by stocks and laccoliths."
Print Book, English, 1967
United States Government Printing Office, Washington, 1967