Where: Washington County, Maryland (39.6° N, 77.7° W: paleocoordinates 31.7° S, 73.4° W)
• coordinate estimated from map
When: Chepultepec Formation, Tremadocian (485.4 - 477.7 Ma)
• Chepultepec dolomite about 50 feet above the top of the Conococheague limestone
Environment/lithology: dolomite
Size classes: macrofossils, mesofossils
Preservation: recrystallized, original aragonite
Primary reference: E. O. Ulrich, A. F. Foerste, and A.K. Miller. 1943. Ozarkian and Canadian cephalopods. Part II, Brevicones. Geological Society of America Special Papers 49:1-240 [P. Wagner/P. Wagner/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 189353: authorized by Björn Kröger, entered by Björn Kröger on 13.10.2017
Creative Commons license: CC BY (attribution)
Taxonomic list
| Cephalopoda | |
Oneotoceras sp., Ectenoceras perobliquum, Eremoceras marylandicum, Conocerina bassleri, Conocerina beani, Levisoceras arctedorsatum
Oneotoceras sp. Ulrich 1926
Ectenoceras perobliquum Ulrich et al. 1943
Eremoceras marylandicum Ulrich et al. 1943
Conocerina bassleri Ulrich et al. 1943
Conocerina beani Ulrich et al. 1943
Levisoceras arctedorsatum Ulrich et al. 1943 | |