Pogonip Group

The Pogonip Group is an Ordovician period geologic group located in southern Nevada and in Utah.

Geology
Its subunits in Nevada, from youngest/later to oldest/earlier, are:
 * Goodwin Limestone — 1800 m thick
 * Ninemile Formation — 550 m thick
 * Antelope Valley Limestone — 1100 m thick

It preserves fossils dating back to the Early Ordovician stage of the Ordovician period.