Arnager Limestone Formation, Muleby A, Bornholm (Cretaceous of Denmark)

Where: Denmark (55.2° N, 14.7° E: paleocoordinates 45.2° N, 13.9° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Arnager Limestone Formation, Early/Lower Coniacian (89.3 - 85.8 Ma)

• 'Gry (1960) estimated the thickness of the formation to be about 12-20 m... the formation is upper Lower Coniacian at loc. 1 at Muleby on inocermaid bivalve evidence'

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, glauconitic, sandy marl

• 'Noe-Nygaard and Surlyk (1985) showed that deposition of the formation at Arnagar took place in a complex of low mud mounds, and they suggested that the mounds were caused by the baffling effect of dense growth of siliceous sponges and sponge spicule mats.'
• 'in the Nyker block the formation consists of sandy, glauconitic marl, the so called "Glass-marl" of Ravn (1946)'

Size class: macrofossils

Preservation: mold/impression

Collection methods: Museum repositories: MGUH

Primary reference: T. Birkelund. 1957. Upper Cretaceous belemnites from Denmark. Biologiske Skrifter. Det Kongelige Danske Viden-skabernes Selskab 9(1):1-69 [M. Aberhan/S. Nurnberg/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 70004: authorized by Martin Aberhan, entered by Sabine N├╝rnberg on 14.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• fragments are not included in abundace data of belemnites
Bivalvia
 Myalinida - Inoceramidae
Cephalopoda
 Belemnitida - Belemnitellidae