Siemien section (3.30-3.90 m), Poland (Eocene of Poland)

Also known as 3.30-3.90

Where: Poland (51.2° N, 22.6° E: paleocoordinates 49.7° N, 17.7° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bartonian (41.3 - 38.0 Ma)

• SPECIFIC STRATIGRAPHY: Collection froms horizon between 3.3 and 3.9 m below top of section. Deposits are less than 10 m thick in total, overlain by Quaternary sands, and overlying Maastrictian sediments.

•AGE: Assigned to Bartonian on the basis of similarity of faunal assemblage to Bartonian of England. Furthermore, analysis of planktonic foraminifers shows the unit to be the Globigerapsis semiinvolute Zone, that is in the lower part of the Upper Eocene, and on the basis of coccoliths to be in the Discoaster nodifer biozone, that is uppermost Middle and lowermost Upper Eocene.

• bed-level stratigraphic resolution

Environment/lithology: offshore; glauconitic, shelly/skeletal, gray, green, silty, calcareous sandstone

• The Upper Eocene sequence is represented by transgressive marine series. Most taxa occupy neritic and littoral and warm-temperate conditions. Numerous corals suggest normal salinity. Probably accumulaed in 10-90 m of water depth.
• Green-grey marly sands with glauconite and pelecypod fragments.

Size class: macrofossils

Preservation: original aragonite, original calcite

Collection methods: Macrofauna are housed in the Geological Instiutute (IG) of Poland.

Primary reference: K. Pozaryska. 1977. Upper Eocene foraminifera of East Poland and their paleogeographical meaning. Acta Palaeontologica Polonica 22(1):3-54 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 49751: authorized by Austin Hendy, entered by Austin Hendy on 24.04.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for bivalvia and apparently complete for gastropods (although this is a meagre fauna). Includes all macrofossils.
Rhynchonellata
 Terebratulida - Cancellothyrididae
"Terebratulina nysti" = Rhynchonellopsis nysti
"Terebratulina nysti" = Rhynchonellopsis nysti Bosquet 1862
Bivalvia
 Pectinida - Pectinoidae
Spondylus buchi Philippi 1846 scallop
Spondylus tenuispina Sandberger 1863 scallop
Chlamys carinata Sowerby 1828 scallop
 Ostreida - Ostreidae
Ostrea cymbula Lamarck 1806 oyster
Ostrea prona Wood 1861 oyster
Subspecies: Ostrea prona longa
Ostrea ventilabrum Goldfuss 1826 oyster
 Carditida - Crassatellidae
Crassatella desmaresti Deshayes 1866 clam
"Crassatella woodi" = Salaputium woodi Koenen 1865 clam
Subspecies: Crassatella woodi raricostata
 Pholadida - Corbulidae
 Cardiida - Veneridae
Gastropoda
 Sorbeoconcha - Turritellidae
Mesalia cf. marginata, "Tomyris ukrainiae" = Motyris, "Mesalia sulcata" = Sigmesalia sulcata
"Tomyris ukrainiae" = Motyris turret shell
"Mesalia sulcata" = Sigmesalia sulcata Lamarck 1804 turret shell
Chondrichthyes
 Lamniformes - Lamnidae
Lamna sp. Cuvier 1816 mackerel shark
Echinoidea
 Cidaroida - Cidaridae
Cidaris anhaltina pencil urchin
Cidaris interlineata pencil urchin
Anthozoa
 Scleractinia - Dendrophylliidae
Balanophyllia subirregularis stony coral
[entered as Balanophylia subirregularis]