B-1 ( of the United States)

Also known as SF 477

Where: Millard County, Utah (38.9° N, 113.4° W: paleocoordinates 6.6° S, 85.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: B trilobite zone, House Limestone Formation, Skullrockian (487.5 - 482.3 Ma)

• IbexianSkullrockian

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified limestone

• carbonate ramp, above wave base
• muddy; grey; quartz-rich; minor intraformational conglomerates

Size class: macrofossils

Preservation: replaced with silica

Collected by L.F. Hintze

Collection methods: bulk,

Primary reference: L.F. Hintze. 1951. Lower Ordovician detailed stratigraphic sections for western Utah. Utah Geological and Mineralogical Survey Bulletin 39:99 p. [A. Miller/A. Miller]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 104161: authorized by Seth Finnegan, entered by Seth Finnegan on 07.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Nileidae
Symphysurina cf. cleora, "Symphysurina brevispicata" = Symphysurina walcotti
"Symphysurina brevispicata" = Symphysurina walcotti Kindle 1929 trilobite
 Proetida - Hystricuridae
"Hystricurus millardensis" = Millardicurus millardensis
"Hystricurus millardensis" = Millardicurus millardensis Hintze 1953 trilobite
Rhynchonellata
 Orthida - Eoorthidae
Apheoorthis cf. melita
Apheoorthis cf. melita Hall and Whitfield 1877
Lingulata
 Lingulida - Obolidae
Lingulella cf. pogonipensis
Gastropoda
 Euomphalina - Ophiletidae
Ophileta sp.
Ophileta sp. Vanuxem 1842 snail