Graptolites of the Monograptus acinaces Zone on Bornholm (borehole) (Silurian of Denmark)

Where: Bornholm, Denmark (55.1° N, 14.7° E: paleocoordinates 30.7° S, 5.0° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Rhuddanian (443.4 - 440.8 Ma)

Environment/lithology: marine; lithified, gray shale and lithified limestone

• Sequence is found in a series of fault blocks, cropping out along Laesa and Olea riviulets and also known from wells.
• For overall sequence: "The sequence is mainly developed as dark grey, graptolitic shales interbedded with thin limestone bands."

•For this Zone: "The shales found in the well are homogeneous, dark grey, and with a flattened graptolite fauna."

Primary reference: M. Bjerreskov. 1975. Llandoverian and Wenlockian graptolites from Bornholm. Fossils and Strata (8)1-93 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 13706: authorized by Michael Foote, entered by Michael Foote on 19.04.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Dimorphograptidae
Dimorphograptus erectus
 Graptoloidea - Monograptidae
"Monograptus cf. acinaces" = Huttagraptus acinaces
"Monograptus cf. acinaces" = Huttagraptus acinaces Törnquist 1899 graptolite
 Graptoloidea - Normalograptidae
"Climacograptus angustus" = Normalograptus angustus, "Climacograptus medius" = Normalograptus medius, "Climacograptus rectangularis" = Normalograptus rectangularis
"Climacograptus angustus" = Normalograptus angustus Perner 1895 graptolite
"Climacograptus medius" = Normalograptus medius Tornquist 1897 graptolite
"Climacograptus rectangularis" = Normalograptus rectangularis McCoy 1874 graptolite
 Graptoloidea - Diplograptidae
? Diplograptus rarus