meter 51, Ibex (Ordovician of the United States)

Where: Utah (39.2° N, 113.5° W: paleocoordinates 7.7° S, 81.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Tripodus laevis conodont zone, Juab Formation, Rangerian (471.8 - 468.1 Ma)

• = Zone L (Paralenorthis-Orthidiella)

• bed-level stratigraphic resolution

Environment/lithology: lithified, shelly/skeletal limestone and lithified shale

• cyclical alternations of massive limestones with interbedded recessive thin-bedded limestones and shales

Size class: macrofossils

Reposited in the USNM

Collection methods: bulk, mechanical,

Primary reference: R. A. Fortey and M.L. Droser. 1996. Trilobites at the base of the Middle Ordovician, western United States. Journal of Paleontology 70(1):73-991 [S. Holland/S. Holland/S. Holland]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 37461: authorized by Steven Holland, entered by Steven Holland on 15.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Phacopida - Pliomeridae
Ectenonotus cf. whittingtoni Ross and Barnes 1967 trilobite
 Proetida - Bathyuridae
Psephosthenaspis pseudobathyurus Ross and Barnes 1967 trilobite