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D1968 CO. Meiklejohn mud-mound (Ordovician of the United States)

Also known as USGS D 1968 CO. Reef 2366

Where: Nye County, Nevada (36.9° N, 116.7° W: paleocoordinates 6.4° S, 82.4° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Orthidiella brachiopod zone, Antelope Valley Limestone Formation, Whiterockian (471.8 - 457.5 Ma)

• Lower Antelope Valley Limestone, 168 ft above the base of the mud-mound, 236 ft above base of the formation, Orthidiella Zone, Early Whiterockian

• bed-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified limestone

• 80 m thick and 300 m wide mud-mound in an outer ramp setting in relatively deep and cold water. Core of the mound with zebra limestone bands and stromatactis structures.

Size class: macrofossils

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 80062: authorized by Wolfgang Kiessling, entered by Uta Merkel on 02.04.2008, edited by Melanie Hopkins

Creative Commons license: CC BY (attribution)