ammonites
Peterborough area, Leeds Collection (Jurassic of the United Kingdom)

Where: England, United Kingdom (52.6° N, 0.2° W: paleocoordinates 42.7° N, 9.7° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Sigiloceras enodatum (S. calloviense) - Kosmoceras phaeinum (Peltoceras athleta) ammonoid zone, Peterborough Member (Oxford Clay Formation), Middle Callovian (164.7 - 161.2 Ma)

• "The Peterborough Member (Sigiloceras enodatum (S. calloviense Zone)–Kosmoceras phaeinum (Peltoceras athleta Zone) ammonite Subzone: late Early–early Late Callovian, Middle Jurassic, previously termed the ‘lower Oxford Clay’"

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, carbonaceous mudstone

• "accumulated in a wide, shallow (30–50 m deep) epeiric sea"
• "The Lower Oxford Clay is composed predominantly of organic-rich mudstones that on exposure rapidly develop a shale-like fissility" (Hudson & Martill 1991, p. 20-21)

Size class: macrofossils

Collected by A. N. Leeds, Esq., F.G.S. in <1915; reposited in the BMNH, SMF, SMNS

Collection methods: quarrying, surface (in situ),

• Hunterian Museum of Geology, Glasgow, UK

Primary reference: D. M. Martill and J. D. Hudson. 1991. Fossils of the Oxford Clay 1-286 [R. Benson/R. Benson/R. Benson] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 109800: authorized by Matt Carrano, entered by Hallie Street on 27.05.2011, edited by Roger Benson and Priscilla Vazquez

Creative Commons license: CC BY (attribution)