Hagerstown, old brickyard (Ordovician of the United States)

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
 Ellesmerocerida - Ellesmeroceratidae
Oneotoceras sp. Ulrich 1926
Levisoceras arctedorsatum Ulrich et al. 1943
Eremoceras marylandicum Ulrich et al. 1943
Conocerina bassleri Ulrich et al. 1943
Conocerina beani Ulrich et al. 1943
 Endocerida - Cyrtendoceratidae
Ectenoceras perobliquum Ulrich et al. 1943