silicified trilobites, Falls of the Ohio (Devonian of the United States)

Where: Indiana (38.3° N, 85.7° W: paleocoordinates 40.0° S, 34.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Jeffersonville Formation, Middle Devonian (393.3 - 382.7 Ma)

• middle zone in between lower blue clay with Brevispirifer gregarius and upper unit with Paraspirifer acuminatus

• group of beds-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, red mudstone

Size classes: macrofossils, mesofossils

Preservation: cast, replaced with silica

Collected by Guy Campbell; reposited in the UMMP

Collection methods: chemical,

Primary reference: E. C. Stumm. 1964. Silicified trilobites from the Devonian Jeffersonville Limestone at the Falls of the Ohio. Contributions from the Museum of Paleontology, The University of Michigan 19(1):1-14 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 188933: authorized by Melanie Hopkins, entered by Melanie Hopkins on 21.09.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

• Bryozoans and ostracods are reported but not identified
Trilobita
 Aulacopleurida - Brachymetopidae
 Phacopida - Phacopidae
Phacops pipa trilobite
 Phacopida - Dalmanitidae
 Phacopida -
 Proetida - Proetidae
 Lichida - Lichidae
Acanthopyge contusus Hall and Clarke 1888 trilobite
? Echinolichas eriopis Hall 1863 trilobite
Ceratolichas gryps Hall and Clarke 1888 trilobite