Burnt Bottom [Basement Bed] (Cretaceous of the United Kingdom)

Where: England, United Kingdom (50.8° N, 2.7° W: paleocoordinates 39.6° N, 0.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Basement Bed Member (Lower Chalk Formation), Late/Upper Cenomanian (99.6 - 93.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Lower Chalk, which overlies the Eggardon Grit (Early Cenomanian). AGE: Late Cenomanian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From the 30 cm thick Basement Bed of the Lower Chalk.

• bed-level stratigraphic resolution

Environment/lithology: lithified, concretionary, glauconitic, phosphatic, shelly/skeletal, sandy conglomerate

• COMMENTS: Shallow marine carbonate setting.
• SPECIFIC LITHOLOGY: Chalk, highly glauconitised, with abundant phosphatic fossils and pebbles. LITHIFICATION: Lithified, based on facies description.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: surface (in situ),

• COLLECTOR: Not stated, but probably W. J. Kennedy. REPOSITORY: Unknown, probably the BMNH.

Primary reference: W. J. Kennedy. 1970. A correlation of the uppermost Albian and the Cenomanian of South-West England. Proceedings of the Geologist's Association 81(4):613-677 [A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 82916: authorized by Austin Hendy, entered by Austin Hendy on 05.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to characteristic ammonoidea, bivalvia, gastropoda, and other macrofossils. NOMENCLATURE: Not an authoritative publication and with somewhat antiquated nomenclature. Ammonoidea generally identified to species resolution while bivalves, gastropods and other macrofossils may not.
Cephalopoda
 Ammonitida - Turrilitidae
"Turrilites acutus" = Turrilites (Turrilites) acutus
"Turrilites acutus" = Turrilites (Turrilites) acutus Passy 1832 ammonite
 Ammonitida - Scaphitidae
Scaphites obliquus Sowerby 1813 ammonite
Scaphites equalis Sowerby 1813 ammonite
 Ammonitida - Acanthoceratidae
Calycoceras spinosum Wright and Wright 1951 ammonite
 Ammonitida - Schloenbachiidae
Schloenbachia aff. varians Sowerby 1817 ammonite
"Schloenbachia aff. subtuberculata" = Schloenbachia varians subtuberculata Gerhardt 1897 ammonite