H-21 (Ordovician of the United States)

Also known as SF 339

Where: Millard County, Utah (38.8° N, 113.5° W: paleocoordinates 7.4° S, 83.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: H trilobite zone, Fillmore Limestone Formation, Blackhillsian (474.9 - 470.0 Ma)

• Ibexian; Blackhillsian

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified limestone

• carbonate ramp, above wave base
• grainstone; quartz-rich; grey; interbedded calcisiltites

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 104124: authorized by Seth Finnegan, entered by Seth Finnegan on 07.02.2011, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Bellerophontida -
Bellerophontina indet.2
Bellerophontina indet.2 Ulrich and Scofield 1897 snail
steinkerns
Rhynchonellata
 Orthida - Finkelnburgiidae
? Diparelasma sp.1
? Diparelasma sp.1 Ulrich and Cooper 1936
Trilobita
 Asaphida - Asaphidae
Trigonocerca typica1
Trigonocerca typica1 Ross 1951 trilobite
1Hintze 1953; 2Wagner 2023