Also known as Langton Matravers
Where: England, United Kingdom (50.6° N, 2.0° W: paleocoordinates 41.5° N, 7.8° E)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Worbarrow Tout Member (Lulworth Formation), Middle Berriasian (145.0 - 140.2 Ma)
• Uppermost Lulworth Beds of Casey 1963, lying just below the Cinder Member, the base of which currently marks the Jr/K boundary in Southern England. Section originally published by Ensom 1985. Correlated with horizon DB102 in Durlston Bay.
•Ensom & Sigogneau-Russell (1998, p. 35): The upper horizon lies at the junction of a clay, locally termed the 'Sly', which immediately underlies the 'Cap' bed, 2.6 m below the base of the Cinder Member. This clay-limestone interface can be equated confidently with beds DB 102/103 in Durlston Bay (CLements 1993).
•Cherty Freshwater Mbr now = top of Worbarrow Tout Mbr.
• bed-level stratigraphic resolution
Environment/lithology: lacustrine - small; cherty/siliceous limestone and argillaceous, calcareous claystone
•Ensom & Sigogneau-Russell (1998, p. 35): The sedimentology and environmental setting of the upper horizon has been described by West (1988). Both horizons are thought to represent clays bordering shallow freshwater lakes
Size classes: macrofossils, mesofossils
Collection methods: bulk, quarrying, sieve,
• 3 tons of clay dug from the floor of the quarry, normally the top 2-4cm were collected.
Primary reference: P. C. Ensom. 1987. A remarkable new vertebrate site in the Purbeck Limestone Formation on the Isle of Purbeck. Proceedings of the Dorset Natural History and Archaeological Society 108:205-206 [J. Alroy/E. Leckey/E. Leckey]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 28401: authorized by John Alroy, entered by Erin Leckey on 12.02.2003, edited by Matthew Carrano, Roger Benson, Richard Butler, John Alroy and Philip Mannion
Creative Commons license: CC BY (attribution)