Rocks Lane, NE of Evershot [Lower Chalk] (Cretaceous of the United Kingdom)

Where: England, United Kingdom (50.8° N, 2.6° W: paleocoordinates 39.6° N, 0.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Turrilites acutus ammonoid zone, Lower Chalk Formation, Late/Upper Cenomanian (99.6 - 93.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Lower Chalk, which overlies the Upper Greensand (Late Albian). AGE: Late Cenomanian, on the basis of ammonite biostratigraphy; Turrilites acutus zone. STRATIGRAPHIC POSITION: From 1.6 m thick exposure of chalk overlying Upper Greensand.

• bed-level stratigraphic resolution

Environment/lithology: lithified, phosphatic, gray, sandy lime mudstone

• COMMENTS: Marine carbonate setting.
• SPECIFIC LITHOLOGY: Shattered, grey-buff marly chalk is exposed passing down into sandy buff chalk with small dark and light brown phosphates. LITHIFICATION: Lithified, based on facies description.

Size class: macrofossils

Preservation: cast, mold/impression, replaced with phosphate

Collection methods: bulk,

• COLLECTOR: 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 82857: authorized by Austin Hendy, entered by Austin Hendy on 02.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for 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 - Desmoceratidae
Puzosia sp. Bayle 1878 ammonite
 Ammonitida - Schloenbachiidae
Schloenbachia sp. Neumayr 1875 ammonite
Schloenbachia aff. varians Sowerby 1817 ammonite
"Schloenbachia aff. subtuberculata" = Schloenbachia varians subtuberculata Gerhardt 1897 ammonite
 Ammonitida - Acanthoceratidae
Calycoceras spinosum Wright and Wright 1951 ammonite
Calycoceras bathyomphalum Kosmatt 1895 ammonite
Acanthoceras sp. Neumayr 1875 ammonite
Protacanthoceras sp. Spath 1923 ammonite
 Ammonitida - Forbesiceratidae
Forbesiceras sp. Kossmat 1897 ammonite
 Ammonitida - Baculitidae
Sciponoceras sp. Hyatt 1894 ammonite
 Ammonitida - Turrilitidae
Turrilites scheuchzerianus Bosc 1801 ammonite
"Turrilites acutus" = Turrilites (Turrilites) acutus Passy 1832 ammonite
Turrilites costatus Lamarck 1801 ammonite
 Ammonitida - Anisoceratidae
"Anisoceras cf. plicatile" = Anisoceras plicatilis
"Anisoceras cf. plicatile" = Anisoceras plicatilis Sowerby 1819 ammonite
 Ammonitida - Hamitidae
 Ammonitida - Scaphitidae
Scaphites equalis Sowerby 1813 ammonite
Scaphites obliquus Sowerby 1813 ammonite
Bivalvia
 Arcida - Arcidae
Arcidae indet. Lamarck 1809 clam
 Pectinida - Pectinoidae
 Myalinida - Inoceramidae
"Inoceramus cf. crippsi" = Gnesioceramus cripsii Mantell 1822 clam
Rhynchonellata
 Terebratulida - Gibbithyrididae
 Terebratulida - Terebratulidae
Echinoidea
 Echinoneoida - Conulidae
Conulus castanea sea urchin
 Holectypoida - Discoididae
 Holasteroida - Holasteridae