Name applied as a local term and as part of an unnamed middle unit of Pennsylvanian age for the Quail group of mines on southeast slope of Elk Ridge, Summit Co, CO in the Eagle basin. Is one of four local limestones in the middle unit. Is a single bed in the White Quail mine (from Emmons, 1898) 10-25 ft thick. Consists in report area of two, and locally three, limestone beds interbedded with red to gray sandstone, mudstone, and conglomerate at most places. interbedded sandstone, mudstone, conglomerate not described more fully. Is well exposed on east side of Searle Gulch. The lowest bed is dark-blue mottled limestone 15 to 20 ft thick; the middle bed is dark-gray to black fossiliferous limestone 20 to 30 ft thick; the upper bed is lenticular gray argillaceous limestone 5 to 15 ft thick. Fossils of early Kansas City or Des Moines age identified. Overlies an unnamed white to cream micaceous sandstone of Pennsylvanian age. Underlies an unnamed red to maroon sandstone, mudstone, and conglomerate of Pennsylvanian age. Geologic map. Stratigraphic table.

Source: GNU records (USGS DDS-6; Denver GNULEX).

Given formal member status and assigned to Minturn Formation as one of seven named members in Eagle basin. Measured section on Ptarmigan Hill described. Lies 5,000 ft above the Belden-Minturn contact, and 150 to 200 ft above Elk Ridge limestone member. Is exposed only on top of Ptarmigan Hill and Radio Ridge in the Pando area. Consists of 8 1/2 ft of black dolomite, dolomitic shale, and black fossiliferous shale on Ptarmigan Hill. Consists of 10 ft of dark-gray or brown-gray limestone and dolomite on Radio Ridge. Most of the limestone is oolitic, contains gastropods, cephalopods, pelecypods, and brachiopods. Thought to be Pennsylvanian. Formerly known as a mining district term, the White Quail limestone.

Source: GNU records (USGS DDS-6; Denver GNULEX).