Cromhall Quarry Site 1 (Triassic of the United Kingdom)

Also known as Cromhall Quarry, Slickstones

Where: England, United Kingdom (51.6° N, 2.4° W: paleocoordinates 20.6° N, 6.5° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Carnian (237.0 - 228.0 Ma)

• Whiteside & Marshall (2008) argue for a Rhaetian age based upon the shared presence of Planocephalosaurus with deposits at Tytherington dated as Rhaetian on the basis of palynomorphs, and the presence of fish remains that are typical of the Rhaetian Penarth Group.

•Morton et al. 2017: biostratigraphy of conchostracans from the fissure deposits of Cromhall Quarry also support a late Rhaetian age

• group of beds-level stratigraphic resolution

Environment/lithology: fissure fill; lithified limestone and green mudstone

• red or green mudstones interbedded with thin limestones largely composed of recemented detrital crinoid debris

Size classes: macrofossils, mesofossils

Collection methods: bulk, chemical, mechanical, acetic,

• Material in University of Aberdeen palaeontological collection

•Bone material is extracted from well cemented sediments by placing them in acetic or formic acid baths (between 5 percent and 15 percent solution) and then thoroughly washing and sifting the residues. However, where the bone occurs in soft marls it must be removed manually using fine needles.

Primary reference: W. A. Macfadyen. 1970. Geological Highlights of the West Country. A Nature Conservancy Handbook 1-296 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13173: authorized by Emmanuel Fara, entered by Emmanuel Fara on 25.01.2002, edited by Matthew Carrano, Franco Aspromonte and Richard Butler

Creative Commons license: CC BY (attribution)

Taxonomic list

Osteichthyes
 Tetrapoda -
Tetrapoda indet.4 tetrapod
AUP 11161
Reptilia
 Pseudosuchia -
Suchia indet.2 Krebs 1974 archosaur
 Loricata -
aff. Terrestrisuchus sp.5 Crush 1984 crocodilian
"(= Terrestrisuchus)"
 Eosuchia -
Diphydontosaurus sp.2 Whiteside 1986 lepidosaur
 Eosuchia - Clevosauridae
Clevosaurus hudsoni n. gen. n. sp.3
Clevosaurus hudsoni n. gen. n. sp.3 Swinton 1939 lepidosaur
UMZC T 1271
 Parareptilia - Procolophonidae
Hwiccewyrm trispiculum1 Butler et al. 2023 parareptile
"procolophonid B"