Chrtníky quarry, Unit 1 (lower conglomerate) [Korycany Mbr, Peruc-Korycany Fm] (Cretaceous of Czech Republic)

Where: Czech Republic (50.0° N, 15.6° E: paleocoordinates 39.4° N, 14.7° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Korycany Member (Peruc-Korycany Formation), Late/Upper Cenomanian (99.6 - 93.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Korycany Mbr of the Peruc-Korycany Fm, which overlies an Early Palaeozoic diabase, and is overlain by the Bilá Fm. AGE: Late Cenomanian, 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 the basal unit of the channel, Unit 1 (lower conglomerate).

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, pebbly, sandy, calcareous conglomerate

• SPECIFIC LITHOLOGY: Coarse unsorted conglomerate, boulder and large pebble supported, with irregular clast or matrix support treaks of better sorted material containing mostly smaller clasts (cobbles and smaller pebbles). Lithology of the marix varies strongly from sand (massive and hard) in the lower part to carbonates and siltstones in the upper part. LITHIFICATION: Lithified, on the basis of facies description ad figured specimens.

Size class: macrofossils

Preservation: original calcite, replaced with silica

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 90511: 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
  -
Bivalvia
 Ostreoida -
"Ostreoida indet." = Ostreida
"Ostreoida indet." = Ostreida Fërussac 1822 oyster
 Ostreida - Gryphaeidae
"Ostrea cf. operculata" = Pycnodonte (Phygraea) proteus
"Ostrea cf. operculata" = Pycnodonte (Phygraea) proteus Reuss 1848 oyster
 Ostreida - Ostreidae
Rastellum diluvianum Linnaeus 1767 oyster
Rhynchonellata
 Terebratulida - Chlidonophoridae
Echinoidea
 Cidaroida - Psychocidaridae
Crinoidea
 Isocrinida - Isocrinidae
"Isocrinus" sp. von Meyer 1836 Sea lily