Bed 5a (Hudson et. al. 1995) (Jurassic of the United Kingdom)

Where: Scotland, United Kingdom (56.9° N, 6.2° W: paleocoordinates 46.1° N, 4.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Kildonnan Member (Lealt Shale Formation), Bathonian (168.3 - 166.1 Ma)

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; lithified, silty mudstone and poorly lithified, shelly/skeletal limestone

• 2 layers: 1) silty mudstone with abundant small Praemytilus; gastropod shell-bed at base. 2) limestone; shelly.

Size classes: macrofossils, microfossils

Collection methods: Collection 5a includes layers 5a-d discussed in Hudson's paper.

Primary reference: J. D. Hudson, J. B. Riding, M. I. Wakefield and W. Walton. 1995. Jurassic Paleosalinities and Brackish-water Communities-A Case Study. Palaios 10(5):392-405 [A. Miller/D. Schramm/D. Schramm]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 40705: authorized by Arnold Miller, entered by Danielle Schramm on 28.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Concostracans sp.
RCA Scale 3 of 5
Ptychostylus inermis
RCA Scale 2 of 5
Darwinula sp. Brady and Robertson 1885 ostracod
 Podocopida - Limnocytheridae
Limnocythere sp. Brady 1868 ostracod
 Podocopida -
 Mytilida -
Praemytilus strathairdensis clam
RCA Scale 5 of 5 Juveniles
 Neritoidea - Neritidae
Neritoma sp. Morris 1949 snail
RCA Scale 3 of 5
 Valvatoidea - Valvatidae
Valvata praecursor snail
RCA Scale 2 of 5
Botryococcus sp. Kutzing 1849