Reconnaissance survey of the Roberts Mountains, Nevada

Ordovician graptolites of the Basin Ranges in California, Nevada, Utah, and Idaho

“…As a result of Merriam's and Anderson's (1942) account of the geology in the vicinity of the Roberts Mountains, Nev., geologists realized that two very distinct facies of the Ordovician were separated 8 ORDOVICIAN GRAPTOLITES OF THE BASIN RANGES from each other over much of Nevada by a zone of thrust faults. Ordovician shales, cherts, quartzites, and greenstones such as those of the Vinini formation (Merriam and Anderson, 1942, p. 1693-1698 had been moved eastward over Paleozoic rocks including Ordovician limestones, quartzites, and dolomites.…”

“…Ordovician shales, cherts, quartzites, and greenstones such as those of the Vinini formation (Merriam and Anderson, 1942, p. 1693-1698 had been moved eastward over Paleozoic rocks including Ordovician limestones, quartzites, and dolomites.…”

“…To the cherty and argillaceous sequence Merriam and Anderson (1942, p. 1699-1701 gave the name "western facies," calling attention to the similar deposits described by Turner, Emmons, Spurr, and Ferguson as noted. The area occupied by this sequence has also been termed the Fraser eugeosynclinal belt by Kay (1947Kay ( , p. 1291 fig.…”

Geology of the Atomic Energy Commission Nevada Proving Grounds area, Nevada

“…In the original definition the Nevada included likewise an upper limestone later proposed as an independent formation, the Devils Gate limestone (Merriam and Anderson, 1942;Nolan and others, 1956). Both the Nevada formation (restricted) and the overlying Devils Gate limestone have been recognized in the Yucca Flat area.…”

Devonian and Mississippian rocks and the date of the Roberts Mountains thrust in the Carlin-Pinon Range area, Nevada

“…These assemblages of sedimentary rocks were brought together by movement along the Roberts Mountains thrust (Merriam and Anderson, 1942) during the Antler orogeny, and then covered unconformably by younger Paleozoic sedimentary rocks which make up an overlap assemblage. (For discussion of the general relations see Roberts and others, 1958.…”