D 818 CO. Meiklejohn mud-mound flanking bed (Ordovician of the United States)

Also known as USGS D 818 CO

Where: Nye County, Nevada (36.9° N, 116.7° W: paleocoordinates 6.0° S, 83.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: L? trilobite zone, Antelope Valley Formation (Pogonip Group), Rangerian (470.0 - 470.3 Ma)

• Lower Antelope Valley Limestone, 340 ft above the base of the mud-mound, 408 ft above base of the formation, Orthidiella Zone, Early Whiterockian. However: Ross (1974) tentatively puts it in Zone L.

• bed-level stratigraphic resolution

Environment/lithology: perireef or subreef; lithified, nodular limestone

• flanking bed of the mud-mound

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USGS

Primary reference: R. J. Ross, Jr. 1972. Fossils from the Ordovician bioherm at Meiklejohn Peak, Nevada. United States Geological Survey Professional Paper 685 [S. Finnegan/S. Finnegan/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 80077: authorized by Wolfgang Kiessling, entered by Uta Merkel on 02.04.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Orthida - Orthidiellidae
Orthidiella longwelli, cf. Orthidiella costellata
Orthidiella longwelli Ulrich and Cooper 1938
Trilobita
  -
Trilobita indet.
Trilobita indet. Walch 1771 trilobite