Arnager Limestone Formation, Arnager/Horsemyre Odde, Bornholm (Cretaceous of Denmark)

Where: Denmark (55.1° N, 14.8° E: paleocoordinates 45.1° N, 13.9° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Arnager Limestone Formation, Coniacian (89.8 - 86.3 Ma)

• 'Gry (1960) estimated the thickness of the formation to be about 12-20 m.'

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, argillaceous limestone

• '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.'
• 'marly chalk (hard splintery limestone) with a 20 cm thick basal bed of phosphatized and glauconitized pebbles... the lower 7 m of the strongly bioturbated formation is light grey and has a carbonate content varying from 45-70%.'

Size class: macrofossils

Preservation: mold/impression

Collection methods: Museum repositories: MGUH and GM

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 70001: authorized by Martin Aberhan, entered by Sabine Nürnberg on 14.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• fragments are not included in abundace data of belemnites
Bivalvia
 Myalinida - Inoceramidae
"Inoceramus cf. rotundatus" = Cremnoceramus rotundatus2 Fiege 1930 clam
"Inoceramus (Mytiloides) cf. incertus" = Mytiloides2 clam
"Inoceramus lusatiae" = Mytiloides lusatiae2 Andert 1911 clam
"Inoceramus striatoconcentricus" = Mytiloides striatoconcentricus2 Gümbel 1968 clam
Inoceramus waltersdorfensis2 clam
I. waltersdorfensis cf. hannovrensis
Inoceramus sp.2 Sowerby 1814 clam
Inoceramus "sp. 1"2 Sowerby 1814 clam
I. ex gr. striatoconcentricus
Inoceramus "sp. 2"2 Sowerby 1814 clam
I. ex gr. waltersdorfensis
"Inoceramus aff. cuvierii" = Inoceramus cuvieri2 Sowerby 1814 clam
Cephalopoda
 Belemnitida - Belemnitellidae
 Ammonitida - Scaphitidae
Scaphites (Scaphites) kieslingswaldensis1 Langenhan and Grundey 1891 ammonite
S. (S.) kieslingswaldensis kieslingswaldensis
Yezoites sp.1 ammonite
 Ammonitida - Diplomoceratidae
Neocrioceras (Schlueterella) cf. maderi1 Immel et al. 1982 ammonite
Scalarites sp.1 Wright and Matsumoto 1954 ammonite
 Ammonoidea - Collignoniceratidae
Peroniceras (Peroniceras) tridorsatum1 Schlüter 1867 ammonite