Section 2/Locality 11236 (Triassic of the United States)

Where: Nye County, Nevada (38.9° N, 117.6° W: paleocoordinates 12.8° N, 49.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Luning Formation, Tuvalian (232.0 - 221.5 Ma)

• The Luning Formation is a remnant of a tectonically dismembered Lower Mesozoic carbonate platform complex exposed in scattered ranges throughout west-central Nevada. It rests unconformably upon different, often unamed, Late Paleozoic and Triassic units in each outcrop, but is regoinally overlain by the Upper Triassic through Lower Jurassic Gabbs and Sunrise Formations.

•JA: originally entered as Carnian; the Klamathites macrolobatus zone is Tuvalian according to Lucas et al. 2012

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); lithified shale and lithified lime mudstone

• The lowest, clastic member consists of 250m of chert pebble conglomerates, silty sandstones, and argillites. Except for rare fragments of petrified wood, these sediments are without fossils. The shaly limestone and calcareous shale members, each 200m thick, overlie the clastic unit. These are formed of interbedded silty and shaly limestones, limey shales, mudstones, and claystones, and contain a rich fossil component. The upper most carbonate member is a 400m thick sequence of comparatively silt- and clay-free limestones and secondary dolomites. This unit is also characterized by an abundance of fossils. The upper, fossi-bearing members of the Luning Formation are the focus of this report.

Size class: macrofossils

Reposited in the UCMP

Collection methods: bulk,

Primary reference: J. A. Hogler. 1992. Community structure, paleoecology, and depositional environments within the Upper Triassic Luning Formation of Nevada. [D. Bottjer/N. Bonuso/N. Bonuso]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 32731: authorized by David Bottjer, entered by Nicole Bonuso on 14.07.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
 Nuculanida - Nuculanidae
Nuculana (Thestyleda) sp. Iredale 1929 pointed nut clam
originally entered as "Nuculana (Thestyleda)"; changed by JA 30.6.04
 Ostreida - Pteriidae
Arcavicula sp. Cox 1964 pearl oyster
 Cardiida - Cardiidae
Septocardia sp. Hall 1877 cockle
Gastropoda
  -
Gastropoda "a" Cuvier 1795 snail
"Snail a"
Cephalopoda
 Ammonoidea -
Ammonoidea indet. ammonite
originally entered as "Ammonite (involute)"; changed by JA 30.6.04
Ammonoidea indet. ammonite
originally entered as "Ammonite (evolute)"; changed by JA 30.6.04
 Ceratitida - Tropitidae
Tropites sp. Mojsisovics 1875 ceratite
 Ceratitida - Klamathitidae
 Nautilida - Clydonautilidae
Proclydonautilus sp. Mojsisovics 1902 nautiloid
 Orthocerida - Orthoceratidae
Michelinoceras sp. Foerste 1932