Codden Hill, near Barnstaple (Carboniferous of the United Kingdom)

Where: England, United Kingdom (51.0° N, 4.0° W: paleocoordinates 11.7° S, 0.4° W)

When: Codden Hill Chert Formation, Chadian (345.3 - 345.0 Ma)

• Overlies the Doddiscombe Formation (Unit D of the Pilton Beds of Prentice 1960). Underlies Dowhills Mudstone Formation.

• formation-level stratigraphic resolution

Environment/lithology: marine; mudstone

• Lower half (Tawstock Formation of Jackson, 1991) comprises thin- to medium-bedded pale and dark grey siliceous mudstones, shaly mudstones and cherts. Upper half (Hearson and Rubble Hills formations of Jackson, 1991) comprises thin- to medium-bedded limestones, turbidites and mudstones with streaky laminated cherts in the uppermost part. Two thin tuffs are present and Pectinoid bivalves are common in the upper half. Facies variations mapped on Sheet 293 (Barnstaple) by Edmonds et al (1985) have been shown by Jackson (1991) to be illusory and due to faulting resulting in stratigraphic omissions. Similarly a facies recognised by Prentice (1960) in the Fremington area and dominated by limestones and mudstones has been shown by Jackson (1991) to be the upper half of the Formation with the lower half thrust out.

Size class: macrofossils

Primary reference: P. A. Jell and J. M. Adrain. 2002. Available generic names for trilobites. Memoirs of the Queensland Museum 48(2):331-553 [N. Hughes/L. English/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 216424: authorized by Pete Wagner, entered by Pete Wagner on 11.12.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Proetida - Phillipsiidae
"Phillipsia spatulata n. sp." = Spatulata spatulata
"Phillipsia spatulata n. sp." = Spatulata spatulata Woodward 1902 trilobite