Number of the records: 1
Palaeoenvironments and facies on a progressively flooded rocky island (Upper Cenomanian – Lower Turonian, Bohemian Cretaceous Basin)
- 1.
SYSNO ASEP 0348551 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Palaeoenvironments and facies on a progressively flooded rocky island (Upper Cenomanian – Lower Turonian, Bohemian Cretaceous Basin) Author(s) Žítt, Jiří (GLU-S) SAI, RID
Vodrážka, R. (CZ) RID
Hradecká, L. (CZ)
Svobodová, Marcela (GLU-S) SAI, RID, ORCIDSource Title Journal of the National Museum, Natural History Series. - : Národní muzeum - ISSN 1802-6842
Roč. 179, - (2010), s. 223-234Number of pages 12 s. Language eng - English Country CZ - Czech Republic Keywords Cretaceous island ; weathering ; geomorphology ; sedimentary environments ; biostratigraphy ; Upper Cenomanian-Lower Turonian ; Bohemian Cretaceous Basin Subject RIV DB - Geology ; Mineralogy CEZ AV0Z30130516 - GLU-S (2005-2011) Annotation The first attempt to reconstruct the sedimentary environments on a small Late Cretaceous (Upper Cenomanian - Lower Turonian) rocky island (Plaňany, Bohemian Cretaceous Basin) is presented. The shallow-water, highly variable coarse clastic to sandstone and limestone sedimentation prevailed in the Upper Cenomanian. An erosion event and following condensation interval with mineralization (glauconitization, phosphatization), deposition of the dark grey, Corg. enriched, and later the greenish glauconitic sediments were remarkable during the basal Lower Turonian (Whiteinella archaeocretacea Biozone). All the Lower Turonian strata are relatively fine-grained (claystones, siltstones, marlstones) and evidence the rapid deepening of the sea. During the Helvetoglobotruncana helvetica Biozone, the Plaňany island was deeply submerged and covered by light siltstones. The Early Turonian sea-level rise is well documented by changing microfaunal and macrofaunal (mainly sponge) populations. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2011
Number of the records: 1