The Kinkead Spring Limestone derives its name from Kinkead Spring about 4 kilometers southeast of its type section in Sec. 21, T. 16 N., R. 51 E in the northern Antelope Range (Hose and others, 1982).

The Kinkead Spring Limestone contains reworked conodonts of Late Devonian to Early Mississippian (Kinderhookian) age and foraminifers which indicate Mississippian (Osagean) deposition. At the type section the Kinkead Spring overlies the Davis Spring Formation and has an upper surface truncated by a thrust fault making thicknesses approximate. The Kinkead Spring Limestone is probably a lithic and time equivalent of the Windmill Limestone in the Monitor Range.

The Kinkead Spring Limestone in the Antelope Range is a grey to yellowish-grey, thin-bedded to platy, packstone and grainstone with minor amounts of wackestone. Clasts are composed of peloids, ooids, skeletal fragments, algae and quartz grains with sparse lithoclasts of the underlying Davis Spring Formation (Hose and others, 1982).

Possible Kinderhookian age Kinkead Spring strata occur in the Dobbin Summit area of the Monitor Range (Kleinhampl and Ziony, 1985). This unit is about 1,000 feet of thin-bedded platy to massive, fine-grained and finely laminated black limestone which weathers to a light brown-gray. Minor amounts of pinkish to brownish sandstone and thin conglomerate layers are locally interbedded with the carbonates of the Kinkead Spring.

The Kinkead Spring Limestone is about 525 feet thick at the type locality in the Antelope Range (Hose and others, 1982). Approximately 1,000 feet of limestone at Dobbin Summit in the Monitor Range may also be the Kinkead Spring Limestone according to R. K. Hose (Kleinhampl and Ziony, 1985).

The Kinkead Spring Limestone has been mapped only in the Northern Antelope Range and is most probably a lithologic and time equivalent of the Windmill Limestone mapped by Wise (1977) in the Dobbin Summit area of the Monitor Range.

Hose and others (1982) suggest that echinoderm-bryozoan-brachiopod packstones indicate open platform marine deposition while ooid-algae-foraminifer packstones and grainstones in the Kinkead Spring Limestone suggest a shallow, shoaling environment of deposition.