Where: Northamptonshire, United Kingdom (52.0° N, 1.3° W: paleocoordinates 39.6° N, 7.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Marlstone Rock Formation, Spinatum (189.6 - 183.0 Ma)

• Upper part of the Marlstone Rock-bed in the Midland ironstone field

Environment/lithology: lithified limestone

Size class: macrofossils

Collected by D.V. Ager

• Collection by Ager is implied by text but not stated directly

Primary reference: D. V. Ager. 1954. The genus Gibbirhynchia in the British Domerian. Proceedings of the Geologists' Association 65:25-51 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 138189: authorized by Matthew Clapham, entered by Matthew Clapham on 06.01.2013

Creative Commons license: CC BY (attribution)