Also known as Lyme Regis
Where: England, United Kingdom (50.7° N, 2.9° W: paleocoordinates 37.2° N, 3.0° E)
• coordinate estimated from map
• local area-level geographic resolution
When: Arietites bucklandi ammonoid zone, Lias Group, Sinemurian (199.3 - 190.8 Ma)
• "...the nature of the Liassic sediment and its fossil biota enables the provenance of the specimen to be constrained to the Sinemurain stage of probably the Lyme Regis area..."
•"The large size of the ammonites suggests they may belong to the Arietites bucklandi zone of the lowermost Sinemurian. However, the partial remains are not conlusive and further preparation is neccessary for specific identification of the ammonites. Arietitid ammonites are restricted to the Sinemurian, enabling the age of BRSUG 26539 to be constrained to this time period".
• group-level stratigraphic resolution
Environment/lithology: gray, blue limestone
Size class: macrofossils
Collected by Savage in the 1970s
Collection methods: surface (in situ), mechanical, acetic,
• BRSUG, University of Bristol Geology Museum, Bristol, England, United Kingdom
•The specimen was prepared using a combination of acid and mechanical methods. Each block was repeatedly submerged in dilute acetic acid (7.5%) and consolidated with dilute paraloid in acetone between treatments (for further details see Lindsay 1987). Breakages were repaired using a concentrated solution of paraloid in acetone. A hand-held pneumatic engraver was used to remove matrix from localised areas of coarser sediment that proved more resistant to the acid treatment. Wherever possible, acid was used to expose new areas of bone in order to avoid the risk of accidental drill contact.
Primary reference: P. J. Hopley. 2000. A new plesiosauroid specimen from the Sinemurian, Lower Jurassic, of southern England. Proceedings of the Dorset Archaeological and Natural History Society 122:129-138 [R. Benson/R. Benson]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 138246: authorized by Roger Benson, entered by Roger Benson on 08.01.2013
Creative Commons license: CC BY (attribution)