Doswell sewer plant, bed 3 (USNM) (Triassic of the United States)

Also known as Doswellia type site

Where: Hanover County, Virginia (37.8° N, 77.4° W: paleocoordinates 2.8° N, 15.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Poor Farm Member (Falling Creek Formation), Carnian (237.0 - 228.0 Ma)

• late middle Carnian (Weems 1980); Sandfordian LVF (Lucas & Huber 2003); Carnian (Dilkes & Sues 2009)

• bed-level stratigraphic resolution

Environment/lithology: lacustrine - small; medium, micaceous, gray, argillaceous, sandy siltstone

• shallow waters and quiet conditions suggested
• "Siltstone, medium gray, sandy, very fine grained at base to medium grained at top, poorly sorted, highly calcareous, massive; scattered, 2-6 mm mudballs and 2-3 mm muscovite flakes in upper part"; "25-30 per cent sand...the sand fraction is fine and the calcite is micritic."

Size classes: macrofossils, mesofossils

Preservation: cast, trace

Collected by Kaltenbach, Hotton, Weems & Beazley in 1974; reposited in the USNM

Collection methods: salvage, quarrying, surface (in situ), mechanical,

• specimens collected by James Kaltenbach, Nicholas Hotton III, Robert E. Weems, & Donald Beazley

Primary reference: R. E. Weems. 1980. An unusual newly discovered archosaur from the Upper Triassic of Virginia, U.S.A. Transactions of the American Philosophical Society, New Series 70(7):1-53 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 68950: authorized by Matthew Carrano, entered by Matthew Carrano on 14.02.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
bivalve casts
Gnathostomata
  -
Osteichthyes indet. bony fish
fish scales
Reptilia
 Loricata - Rauisuchidae
 Phytosauria -
"Parasuchia indet." = Phytosauria
"Parasuchia indet." = Phytosauria Jaeger 1828 phytosaur
teeth
 Diapsida - Doswelliidae
Doswellia kaltenbachi n. gen. n. sp.
Doswellia kaltenbachi n. gen. n. sp. Weems 1980 archosauromorph
USNM 244214 (holotype), partial skeleton; USNM 214823 (paratype), partial skeleton; USNM 437574, right jugal