Devonian and Mississippian rocks of the northern Antelope Range, Eureka County, Nevada

Early Devonian (Pragian) vertebrates from the northern Roberts Mountains, Nevada

“…1), interpreted as being deposited in a well-aerated, shallow-water marine environment. Its stratigraphy has been studied in four of these ranges: Sulphur Springs (Carlisle et al, 1957), Lone Mountain and Roberts Mountains (Murphy and Gronberg, 1970), northern Antelope Range (Johnson et al, 1980; Hose et al, 1982), and Hot Creek Range (McGovney, 1977). These rocks have yielded a fauna of conodonts (especially icriodontids), brachiopods, corals, bryozoans, pelmatozoans, trilobites, ostracodes, nautiloids, bivalves, gastropods, tentaculites, sponges, calcareous algae, fish, and burrowing organisms.…”

“…Vertebrate microfossils from the Devonian of the western United States have been described only rarely (e.g., Turner and Murphy, 1988; Parkes, 1995; Burrow, 2003, 2007), despite occurrences of vertebrates being mentioned in many older stratigraphic publications (e.g., Berry and Murphy, 1975; Gregory et al, 1977; Hose et al, 1982; Murphy and Berry, 1983). Late Silurian–Early Devonian strata in Nevada have been most rigorously sampled in the quest for diagnostic conodonts and invertebrates to establish relative age both locally and worldwide.…”

“…Late Silurian–Early Devonian strata in Nevada have been most rigorously sampled in the quest for diagnostic conodonts and invertebrates to establish relative age both locally and worldwide. The Kobeh Member of the McColley Canyon Formation in the Willow Creek section in the northern Roberts Mountains is one of the few Pragian deposits in the western United States known to yield vertebrate microremains, with rare fish scales also noted from the Monitor Range (MAM, personal observation) and the McColley Canyon Formation in the Northern Antelope Range (Hose et al, 1982), both in central Nevada. Other faunal elements are abundant in the inner shelf deposits of this region.…”

Micropaleontological zonation (foraminifers, algae) and stratigraphy, Carboniferous Peratrovich Formation, southeastern Alaska

“…In the type Pennsylvanian, the basal part of the system is nonmarine and thus contains no foraminifers. In the type Morrowan, the conglomerate basal part of the group (Zone 20) rests discordantly on the Mississippian, which was eroded (Zone 18 or 19) (Brenckle, 1977;Mamet, 1982). In fact, no section between the Mississippian and Pennsylvanian is continuous in the central part of North America (Groves, 1983).…”

“…This zone is also known in these formations: 1. The Bird Spring Formation and Ely Limestone in Nevada (Brenckle, 1973;Mamet, 1982 Pseudostaffella appears in the Ladrones Limestone one zone later than in the Tethys, and a direct comparison with that domain is difficult. Zone 21 of the Donets Basin in the Ukraine is placed in the Bashkirian.…”