Borehole Bialopole, Lower Mielnikian (Silurian of Poland)
Where: Poland (51.0° N, 23.7° E: paleocoordinates 20.7° S, 4.2° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Ludlow (427.4 - 423.0 Ma)
• Lower Mielnikian
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 145670: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 08.06.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Show authors, comments, and common names
Pterobranchia | |
Gothograptus nassa graptolite | |
Pristiograptus pseudodubius graptolite
Pristiograptus cf. ladenicensis graptolite
Pristiograptus cf. dubius graptolite | |
Crinoidea | |
Crinoidea indet. Miller 1821 Sea lily | |
Trilobita | |
Odontopleura cf. ovata Emmrich 1839 trilobite | |
Cephalopoda | |
Cephalopoda indet. Cuvier 1797 | |
Bivalvia | |
Bivalvia indet. Linnaeus 1758 clam |