Borehole Bialopole, Upper part of the Siedlce series (Silurian of Poland)

Where: Poland (51.0° N, 23.7° E)

• Paleocoordinates: 2.5° N, 34.6° W (Wright 2013)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Pridoli (423.0 - 419.2 Ma)

• Upper part of the Siedlce series. Ludlovian through Siegenian

Environment/lithology: deep subtidal; siltstone

• Silurian deposits in the investigated area range in age:: from the Wenlockian across Devonianboundary. They represent the graptolite-shaly facies with siltstones in the upper part of the section. These deposits pass continuously into the Lower Devonian represented by claystones and siltstones intercalated commonly with layers and lenses of limestones enclosing an abundant

•marine fauna. The siltstones become upwards more and more sandy and comprise commonly layers of fine-grained quartz sandstones; they are often mottled and display commonly mud cracks. This is a typical Oldred fades; it is attributed to the Siegenian to Emsian. Thus, the marine sedimentation persisted in the investigated area continuously all through the Silurian and Lower Devonian. The earliest regression is marked in the Lower Siegenian deposits, while the

•terrestrial oldred-type sedimentation became prevalent in the Upper Siegenian.

Size classes: macrofossils, mesofossils, microfossils

Primary reference: R. Wrona. 1980. Upper SiIurian-Lower Devonian Chitinozoa from the subsurface of southeastern Poland. Palaeontologia Polonica 41:103-165 [W. Kiessling/M. Krause]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 145674: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 08.06.2013

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
  -
Cephalopoda indet.
Cephalopoda indet. Cuvier 1797
Bivalvia
  -
Bivalvia indet.
Bivalvia indet. Linnaeus 1758 clam
Pterobranchia
 Graptoloidea - Monograptidae
Monograptus formosus, Pristiograptus cf. dubius
 Graptoloidea - Cryptograptidae
Linograptus posthumus
 Graptoloidea -
"Monograptus ultimus" = Neocolonograptus ultimus
"Monograptus ultimus" = Neocolonograptus ultimus Perner 1899 graptolite