Chrtníky quarry, Unit 8a-e [Bilá Fm] (Cretaceous of Czech Republic)

Where: Czech Republic (50.0° N, 15.6° E: paleocoordinates 40.1° N, 14.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bilá Formation, Early/Lower Turonian (93.5 - 89.3 Ma)

• STRATIGRAPHIC RELATIONS: From the Bilá Fm, which overlies the Korycany Mbr of the Peruc-Korycany Fm. AGE: Early Turonian, presumably on the basis of foraminiferal and macrofossils biostratigraphy. STRATIGRAPHIC POSITION: From a deep depression, named the Giant Channel, situated in the eastern part of the quarry. Collection is from near top of section, Unit 8a-e (siltstones with sponges), which is about 1.5-2 m thick.

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, gray, yellow siltstone

• SPECIFIC LITHOLOGY: Soft siltstones, greyish, yellowish, distinctly stratified, with massive hard intercalations.. LITHIFICATION: Poorly lithified, on the basis of facies description and figured specimens.

Size class: macrofossils

Collected by Vodrazka & Zitt

Collection methods: bulk, surface (in situ),

• COLLETORS: Vodrazka & Zitt. REPOSITORY: Institute of Geology (Academy of Sciences of the Czech Republic) in Prague.

Primary reference: J. Zitt, R. Vodrázka, L. Hradecká, M. Svobodová, and K. Zágorsek. 2006. Late Cretaceous environments and communities as recorded at Chrtníky (Bohemian Cretaceous Basin, Czech Republic). Bulletin of Geosciences 81(1):43-79 [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 90517: authorized by Austin Hendy, entered by Austin Hendy on 04.08.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for macro invertebrates and microfossils. NOMENCLATURE: Not an authoritative publication, but with relatively modern nomenclature and species-resolution identifications.
unclassified
  -
Rhynchonellata
 Thecideida - Thecideidae
 Rhynchonellida - Cyclothyrididae
Craniata
 Craniida - Craniidae
Polychaeta
 Serpulimorpha -
Bivalvia
 Pectinida - Dimyidae
Atreta "sp. 1" Etallon 1862 scallop
Atreta "sp. 2" Etallon 1862 scallop
 Pectinida - Pectinoidae
Chlamys sp. Röding 1798 scallop
 Ostreida - Gryphaeidae
"Hyotissa semiplana" = Hyotissa semipiana Sowerby 1825 oyster
Gryphaeostrea canaliculata Sowerby 1813 oyster
 Ostreida - Pinnidae
Pinna sp. Linnaeus 1758 oyster
Gymnolaemata
 Cheilostomata - Calloporidae
 Cheilostomata - Onychocellidae
Stenolaemata
 Cyclostomata - Oncousoeciidae
Proboscina sp. Audouin 1826
 Cyclostomata - Stomatoporidae
 Cyclostomata - Plagioeciidae
 Cyclostomata - Eleidae
Actinopteri
 Elopiformes - Elopidae
Osmeroides sp. Agassiz 1843
Echinoidea
 Cidaroida - Psychocidaridae
Tylocidaris sorigneti pencil urchin
 Spatangoida - Hemiasteridae
Hemiaster sp. Agassiz and Desor 1847 heart urchin
Crinoidea
 Isocrinida - Isocrinidae
"Isocrinus" sp. Meyer in Agassiz 1836 Sea lily
Isocrinus sp. Meyer in Agassiz 1836 Sea lily
unclassified
  -
Porifera indet. Grant 1836
Demospongea
 Lithistida -
 Tetralithistida - Siphoniidae
Siphonia geinitz demosponge
Siphonia sp. Goldfuss 1826 demosponge
Jerea decurtata demosponge
 Tetralithistida - Astrocladiidae
Astrocladia sp. Zittel 1878 demosponge
 Spirosclerophorida - Seliscothonidae
Seliscothon sp. Zittel 1878 demosponge
 Spirosclerophorida - Scleritodermatidae
 Spirosclerophorida - Azoricidae
Scytalia pertusa demosponge
Scytalia sp. Zittel 1878 demosponge
Chonella sp. Zittel 1878 demosponge
Cytoracia obesa demosponge
Hexactinellida
 Innaecoeliida - Craticulariidae
Botroclonium arborescens Pocta 1883 glass sponge
Laocoetis beaumonti glass sponge
Laocoetis vulgata Pocta 1883 glass sponge
 Lychniscosa -
 Hexactinosa - Cribrospongiidae
Guettardiscyphia sp. Fromentel 1860 glass sponge
 Hexactinosa - Cystispongiidae
Cystispongia morchella Pocta 1883 glass sponge
 Hexasterophora -
Lychniscosida indet. Schrammen 1903 glass sponge
Calcarea
 Pharetronida -
Tremospongia clavata calcareous sponge
 Calcaronea - Endostomatidae
Endostoma sp. Roemer 1864 calcareous sponge