The Deep Spring Formation is mainly composed of
siltstone,
sandstone, limyor
dolomitic sandstones,
quartzite, sandy limestones and dolomite. It is overlain by the
Campito Formation, whilst it is underlain by the
Reed Dolomite.
Members The Deep Spring Formation is composed of three members, which are as follows, in ascending
stratigraphic order (lowest to highest): •
Dunfee Member: This member is the thickest, getting up to thick, and is composed of medium-gray or grayish-orange fine crystalline and very thin bedded limestone. Some layers of limestone contain fine grains of
quartz, and small irregular carbonate pellets about a quarter of an inch in diameter. There are also light-gray, medium-gray or very-pale-orange fine to coarse crystalline and laminated to thick-bedded dolomite, which occur at the base and top of the member. •
Esmeralda Member: This member can get up to thick, and consists primarily yellowish-gray, pale-yellowish-brown, and very-light-gray very fine to fine grained, and evenly laminated to rarely cross-stratified quartzite and
calcareous sandstone. There are medium-gray very fine crystalline to fine crystalline limestone, some of which is
oolitic. Within some parts of the member, there are also greenish-gray, olive-gray, and very pale orange siltstone, as well as very-pale-orange very fine crystalline to medium crystalline dolomite. •
Gold Point Member: This member is the thinnest, getting up to thick, and is primarily composed of grayish-olive, greenish-gray, and medium-gray siltstone and very fine grained silty quartzite in the lower parts of this member, whilst in the upper parts of the member has medium-gray fine crystalline dolomite, with occasional limestones. == Paleobiota ==