Hintze faunule J-13 from Ibex (Ordovician of the United States)

Where: Utah (38.9° N, 113.5° W: paleocoordinates 7.4° S, 83.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Wah Wah Formation (Pogonip Group), Blackhillsian (478.6 - 471.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; lithified, gray grainstone and lithified siltstone

• Multiple sources indicate that this was a carbonate dominated ramp, with substantial siliciclastic input, below normal wave base, above storm wave base.
• Calcisiltite, medium gray, silty, shaly reentrant under ledge.

Preservation: original silica, replaced with silica

Primary reference: L. F. Hintze. 1952. Lower Ordovician trilobites from western Utah and eastern Nevadea. Utah Geological and Mineralogical Survey Bulletin 48:249 p. [A. Miller/A. Miller/A. Miller]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 63929: authorized by Arnold Miller, entered by Arnold Miller on 25.08.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• The faunal lists in Hintze 1952 are updated versions of those in Hintze 1951 and, so, are used here.
Trilobita indet. Walch 1771 trilobite
unassigned pygidium
 Phacopida - Cheiruridae
? Kawina webbi Hintze 1952 trilobite
 Proetida - Telephinidae
Carolinites genacinaca Ross 1951 trilobite
 Asaphida - Asaphidae
Lachnostoma latucelsum, "? Isoteloides genalticurvatus" = Stenorhachis genalticurvatus, "Paranileus sp." = Presbynileus, "Kirkella declivita" = Kirkella declevita
Lachnostoma latucelsum Ross 1951 trilobite
"? Isoteloides genalticurvatus" = Stenorhachis genalticurvatus Hintze 1952 trilobite
"Paranileus sp." = Presbynileus Hintze 1954 trilobite
"Kirkella declivita" = Kirkella declevita Ross 1951 trilobite
 Lithistida - Anthaspidellidae
Zittelella cf. clarae demosponge