Graptolites of the Monograptus turriculatus Zone on Bornholm (Silurian of Denmark)

Where: Bornholm, Denmark (55.1° N, 14.7° E: paleocoordinates 27.2° S, 4.2° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Telychian (438.5 - 433.4 Ma)

Environment/lithology: marine; lithified, gray, argillaceous mudstone and lithified, gray shale

• "At the top of the convolutus beds...within a vertical distance of 1 cm the shales change to light grey, argillaceous and silty mudstone. The sediment is non-graptolitiferous but rich in pyritized fossil traces...At 2 m above the top of the convolutus Zone...graptolites reappear in a finely laminated, light grey, mainly argillaceous mudstone...Higher up...the mudstone becomes darker grey and towards the top of the zone dark grey shales alternate with 2-3 cm thick bands of non-fossiliferous green mudstone..."

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 13711: authorized by Michael Foote, entered by Michael Foote on 19.04.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Pterobranchia
 Graptoloidea - Retiolitidae
Pseudoplegmatograptus obesus, Glyptograptus auritus n. sp., "Petalograptus palmeus" = Petalolithus, "Petalograptus ovatus" = Petalolithus, "Petalograptus altissimus" = Petalolithus
Glyptograptus auritus n. sp. graptolite
"Petalograptus palmeus" = Petalolithus graptolite
"Petalograptus ovatus" = Petalolithus graptolite
"Petalograptus altissimus" = Petalolithus graptolite
 Graptoloidea - Monograptidae