Halla Bed b Tentaculitids (Silurian of Sweden)

Where: Gotland, Sweden (57.5° N, 18.4° E: paleocoordinates 19.7° S, 2.6° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Halla Beds Formation, Homerian (430.5 - 427.4 Ma)

• Correlation from Jeppsson (1983), Fossils and Strata 15:128.

• bed-level stratigraphic resolution

Environment/lithology: marine; bioturbated, argillaceous limestone and ooidal limestone

• Ref. 11073: "Halla Beds (15m): In the eastern part of Gotland a series of shallow marine sediments was deposited on a discontinuity plane. Pure oolites at the base are overlain by bioturbated argillaceous limestones with an abundant but impoverished marine fauna, indicating marginal marine to lagoonal conditions. These limestones grade into conglomeratic oncolites which are interrupted by evenly abraded hardgrounds..."

Primary reference: K. Larsson. 1979. Silurian tentaculitids from Gotland and Scania. Fossils and Strata 11:1-180 [M. Foote/M. Foote/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13551: authorized by Michael Foote, entered by Michael Foote on 12.04.2002, edited by Mihaela Krause

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Tentaculita
 Volynitida - Dicricoconidae
Dicricoconus cracens
Trilobita
 Phacopida - Cheiruridae
Deiphon ellipticum