I-1227 (Ordovician of the United States)

Where: Carter County, Oklahoma (34.4° N, 97.1° W: paleocoordinates 21.4° S, 82.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Strigigenalis caudata trilobite zone, Kindblade Formation, Cassinian (482.3 - 470.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified lime mudstone and lithified, intraclastic wackestone

• Within unit 8, described as "Resistant, thick-bedded, lime mudstone and intraclastic wackestone to packstone, moderately fossiliferous, erodes as ledges. Alternates with thin-bedded lime mudstones laminated with argillaceous to dolomitic partings which erode into recesses. Uncommon oolitic wackestones, sparse skeletal grainstones, sparse bioturbated lime mudstones."

Size class: macrofossils

Collected by J. D. Loch

Collection methods: bulk,

Primary reference: J. D. Loch. 2007. Trilobite biostratigraphy and correlation of the Kindblade Formation (Lower Ordovician) of Carter and Kiowa Counties, Oklahoma. Oklahoma Geological Survey Bulletin 149:1-154 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 106825: authorized by Melanie Hopkins, entered by Melanie Hopkins on 29.03.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

 Asaphida - Asaphidae
Isoteloides peri Fortey 1979 trilobite
1 pygidium
 Proetida - Bathyuridae
Strigigenalis caudata Billings 1865 trilobite
7 cranidia, 13 pygidia, 3 librigena
Strigigenalis crassimarginata Cullison 1944 trilobite
3 pygidia, 2 librigena
Benthamaspis onomeris Loch 2007 trilobite
1 pygidium
Bolbocephalus stitti Loch 2007 trilobite
1 pygidium
 Proetida - Dimeropygidae
Dimeropygiella "sp. 1" Ross 1951 trilobite
3 cranidia, 1 librigena