Pg. 357-360, pls. 32, 33. Eleana formation. Lithologically most diverse unit in area. Generally consists of a conglomerate, quartzite, and shale facies in northern part of area. Southward, these grade into finer grained sediments. On Quartzite Ridge, where incomplete measured section is 2,810 feet thick, the Eleana is subdivided into three units. Lower unit consists of 1,000 feet or more of dark-brown to buff hard poorly bedded slope-forming argillite and shale. Middle is composed of about 1,050 feet of interbedded quartzite, conglomerate. Upper consists of about 760 feet of varicolored argillite. These three units traceable southward into Eleana Range where they grade laterally into finer grained sediments. Most noticeable facies change is in middle unit which is split by shale tongue which thickens southward where it also contains interbedded limestone beds and occupies about a third of middle unit. Remainder is conglomerate and quartzite. Similar changes occur in upper unit. In southern part of Eleana, upper unit consists of interbedded sequence of argillite and limestone. South of Eleana Range and in Mine Mountains, middle and upper units not recognizable as such owing to abrupt lithologic changes. In these areas, formation consists of interbedded conglomerate, quartzite, shale, and some limestone. Lower contact of formation not exposed in area. Underlies Tippipah limestone (new). Upper contact on margins of Syncline Ridge, place at lithic break between interbedded quartzite, argillite, and overlying limestone and appears to be conformable. Age is Mississippian to Early Pennsylvanian.
Named for exposures in Eleana Range, Atomic Energy Commission Nevada proving grounds area, Nye Co., southern NV.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1226-1227).