Where: Culpeper County, Virginia (38.4° N, 77.9° W: paleocoordinates 13.1° N, 22.2° W)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Groveton Member (Bull Run Formation), Lacian to Lacian (221.5 - 212.0 Ma)
• early and/or middle Norian; also called the Balls Bluff Siltstone
• bed-level stratigraphic resolution
Environment/lithology: lacustrine - large; lithified, black, gray, calcareous siltstone and mudstone
•"massive, calcareous cemented siltstone"
Size class: macrofossils
Preservation: mold/impression, trace
Collected by R. Weems, R. Litwin in the 1974–1985, 1990s
Collection methods: surface (in situ), peel or thin section,
Primary reference: J. R. Smith. 1982. Dinosaurs in Virginia—evidence of two new genera. Lapidary Journal 36(6):1110-1111 [M. Carrano/M. Carrano]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 68890: authorized by Matthew Carrano, entered by Matthew Carrano on 12.02.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
Gregaripus bairdi n. gen. n. sp.2
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"Agrestipus hottoni n. gen. n. sp." = Brachychirotherium parvum2
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