Haget trilobites, "ooid" horizon (Ordovician of Sweden)

Where: Sweden (57.3° N, 17.0° E: paleocoordinates 38.3° S, 8.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: A. expansus trilobite zone, Holen Formation, Kunda (468.1 - 463.5 Ma)

• Also referred to as bed "a" by Bohlin 1949. Age and stratigraphy based on Nordlund 1989 (GFF 111:64-94) and Struresson 1986 (GFF 108:331-348).

Environment/lithology: marine; lithified, shelly/skeletal limestone and lithified, ooidal, black marl

• 18 cm thick dark, rusty-looking, limestone full of small brown pseudooids (small fragments of fossil in an intense brown color), with 3-4 cm layers of black, soft, marly limestone with small black ooids above and below. Fossils collected from middle unit.

Size class: macrofossils

Collected in 1947

Collection methods: surface (in situ),

Primary reference: B. Bohlin. 1949. The Asaphus Limestone in northernmost Ă–land. Bulletin of the Geological Institution of the University of Uppsala 33:529-570 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 188268: authorized by Melanie Hopkins, entered by Melanie Hopkins on 27.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Asaphida - Asaphidae
"Megalaspis acuticauda" = Megistaspis (Megistaspidella) acuticauda Angelin 1854 trilobite
"Megalaspis gibba" = Megistaspis trilobite
Niobe sp. Angelin 1851 trilobite
Asaphus expansus Wahlenberg 1821 trilobite
Asaphus cf. raniceps Dalman 1827 trilobite
Craniata
 Craniida - Craniidae
Pseudocrania sp. M'Coy 1851