Ghost Ranch Quarry (Triassic of the United States)

Also known as Whitaker Quarry, Coelophysis Quarry

Where: Rio Arriba County, New Mexico (36.3° N, 106.5° W: paleocoordinates 14.8° N, 46.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Siltstone Member (Chinle Formation), Rhaetian (208.5 - 201.3 Ma)

• Apachean LVF. Has been placed variously previously in the "upper Petrified Forest Member", in the "siltstone member" of the Chinle Formation, the Owl Rock Member and the Rock Point Member.

• group of beds-level stratigraphic resolution

Environment/lithology: crevasse splay; bioturbated, intraclastic, brown, green, red, muddy siltstone and pebbly, calcareous conglomerate

• "pond [underlying the main quarry layer] represented a topographic depression in which the dinosaurs and associated carcasses accumulated...carcasses were washed into the quarry by a single [flood] event that also ripped up underlying lacustrine siltstones and even introduced some bones into the uppermost level of the lacustrine interval"
• "The quarry itself is in a sequence of 11 siltstone beds...These beds are intensively bioturbated, contain many silt rip-up clasts"; "predominately of reddish-brown, yellowish-brown, and light greenish-grey siltstones interbedded with carbonate pebble conglomerates; 10-20 m of interbedded sandstone and siltstone comprise the top of the section."

Size classes: macrofossils, mesofossils, microfossils

Collected by E. H. Colbert in 1947-1982; reposited in the AMNH, CM, MCZ, YPM

Collection methods: bulk, quarrying, surface (float), surface (in situ), mechanical,

• 1947 AMNH expedition under E. H. Colbert

•Material also in MNA, NMMNH, TMP

Primary reference: E. H. Colbert. 1947. The little dinosaurs of Ghost Ranch. Natural History 59(9):392-399-427-428 [A. Behrensmeyer/A. Behrensmeyer/A. Murch]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 48422: authorized by Matthew Carrano, entered by Matthew Carrano on 18.03.2005, edited by Richard Butler and Bethany Allen

Creative Commons license: CC BY (attribution)

Taxonomic list

 Diplostraca - Shipingiidae
Shipingia sp.10 Shen 1976 clam shrimp
Darwinula sp.10 Brady and Robertson 1885 ostracod
 Palaeonisciformes - Redfieldiidae
Synorichthys cf. stewarti10 Schaeffer 1967
AMNH 5719
 Coelacanthiformes - Mawsoniidae
Chinlea sorenseni11 Schaeffer 1967 coelacanth
AMNH 5657
Reptilia indet.10 Laurenti 1768 reptile
NMMNH P-55352
 Eosuchia -
Archosauriformes indet.10 Gauthier 1986 archosauromorph
NMMNH P-41307, 41601, 42571, teeth
 Eosuchia - Doswelliidae
Vancleavea campi7 Long and Murry 1995 archosauromorph
 Saurischia - Coelophysidae
"Coelurus bauri n. sp." = Coelophysis bauri2
"Coelurus bauri n. sp." = Coelophysis bauri2 Cope 1887 neotheropod
Numerus skeletons including designated neotype material for Coelophysis bauri
 Saurischia -
Daemonosaurus chauliodus n. gen. n. sp.12
Daemonosaurus chauliodus n. gen. n. sp.12 Sues et al. 2011 theropod
CM 76821, nearly complete but crushed skull and anterior cervical vertebrae
 Dinosauromorpha - Silesauridae
Eucoelophysis sp.10 Sullivan and Lucas 1999 ornithodiran
TMP 84-63-33, partial skeleton
 Pseudosuchia - Shuvosauridae
Effigia okeeffeae n. gen. n. sp.6
Effigia okeeffeae n. gen. n. sp.6 Nesbitt and Norell 2006 archosaur
AMNH 30587 (holotype), articulated skeleton. AMNH 30588 -30590, postcranial material
 Loricata -
Crocodylomorpha "unnamed species"5 crocodilian
CM 73372, articulated skeleton. GR 1007, ilium
Hesperosuchus "unnamed species"5 Colbert 1952 crocodilian
CM 29894, skull and articulated partial postcranial skeleton. NMMNH P-57654, osteoderms
 Phytosauria - Parasuchidae
Redondasaurus bermani n. sp.3 Hunt and Lucas 1993 archosaur
Redondasaurus gregorii4 Hunt and Lucas 1993 archosaur
NMMNH P-44920, skull of juvenile
 Rhynchocephalia -
Whitakersaurus bermani n. gen. n. sp.1
Whitakersaurus bermani n. gen. n. sp.1 Heckert et al. 2008 rhynchocephalian
 Diapsida - Drepanosauridae
Drepanosauridae indet.9 Berman and Reisz 1992 diapsid
NMMNH P-57651, partially articulated hindlimb
Avicranium renestoi n. gen. n. sp.8 Pritchard and Nesbitt 2017 diapsid
AMNH FARB 30834, partial skull and articulated cervical series
Drepanosaurus sp.9 Pinna 1980 diapsid
GR 1113, pectoral girdle