Pg. 1. Elder sandstone. Thickness 3,000 to 5,000 feet. Arkosic sandstone dominant with beds of tan, pale, or buff chert. Overlies Ordovician Valmy formation; underlies Middle Devonian Slaven chert (new). Age not stated.
Occurs in Roberts Mountains area, Eureka district, northeastern NV.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1224).

Pg. 9 (table 1), 30-31, 35-36, pl. 1 (geol. map), pl. 3 (corr. chart), pl. 4 (fossil locs.). Elder Sandstone. Present in upper plate of Roberts thrust (siliceous western facies). Consists mostly of silty sandstone with subordinate interbeds of siltstone, sandy siliceous tuffite shale, and thin, platy, light-tan, light-gray, and yellow-brown chert; much of sandstone and siltstone is notably feldspathic. Euhedral pyrite is very common; oxidation of the pyrite gives formation its distinctive yellow-brown color. Bounded by faults so original relations to Valmy Formation or Slaven Chert are unknown. Estimated thickness 2,000 to 4,000 feet. Age is considered Early Silurian (Llandovery, probably late Llandovery), based on fossils (graptolites) identified from two small collections. Report includes geologic map, faunal list, correlation chart.
Type locality: hill extending northeastward from sharp bend of Elder Creek, in sec. 30, T. 28 N., R. 46 E., Lander Co., NV, to Utah Mine, in sec. 16 (unsurveyed), T. 28 N., R. 46 E., Eureka Co., NV. Named from exposures in drainage basin of Elder Creek, in southeastern part of Mount Lewis quadrangle, Lander Co., northern NV.

Source: Publication.