I-268 (Ordovician of the United States)

Where: Carter County, Oklahoma (34.4° N, 97.1° W: paleocoordinates 20.9° S, 84.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Jeffersonia granosa trilobite zone, Kindblade Formation, Jeffersonian (485.4 - 470.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; massive, bioturbated lime mudstone and shelly/skeletal grainstone

• See also Toomey and Nitecki, 1979.
• Within unit 1, described as "Resistant, thick-bedded lime mudstones, massive to bioturbated. Alternate with thin- to medium-bedded skeletal lime grainstones and intraclastic lime wackestones to packstones that erode into recesses...Common sponge-algal bioherms and common stromatolites [at various intervals]."

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 106582: authorized by Melanie Hopkins, entered by Melanie Hopkins on 26.03.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Stromatolite indet.
Trilobita
 Proetida - Hystricuridae
Rollia goodwini
Rollia goodwini Cullison 1944 trilobite
1 cranidium, 1 librigena
 Proetida - Bathyuridae
"Chapmania oklahomensis" = Chapmanopyge oklahomensis, Jeffersonia granosa
"Chapmania oklahomensis" = Chapmanopyge oklahomensis Loch 2007 trilobite
1 pygidium
Jeffersonia granosa Cullison 1944 trilobite
1 cranidium