Record details

Title
    Mid-Cretaceous palynomorphs from the Blansko Graben (Czech Republic): affinities to both Tethyan and Boreal bioprovinces
Statement of responsibility
    Marcela Svobodová
Other titles
    Proceedings of the 4th European Palaeobotanical and Palynological Conference (Variant.)
Author
    Svobodová, Marcela
Language
    anglicky
Source title - serial
    Mededelingen Nederlands Instituut voor Toegepaste Geowetenschappen TNO
Vol./nr.
    Vol. 58
Pages
    p. 149-155
Year
    1997
Notes
    3 obr., 2 tab., 1 pl., 1 s.bibl.
    Anglické resumé
    Zkr. název ser.: Meded. Nederl. Inst. Toegepaste Geowet. TNO.
Subject group
    cenoman
    česká křídová pánev
    křída
    orlicko-žďárský faciální vývoj
    palynomorfa
    provincie floristická
    Tethys
Geographical name
    ČR-Morava
    Letovice (Blansko)
    Vřesice (Blansko)
Keyword
    Affinities
    Bioprovinces
    Blansko
    Boreal
    Both
    Czech
    Graben
    Mid-Cretaceous
    Palynomorphs
    Republic
    Tethyan
Abstract (in english)
   Seven boreholes were sampled for palynological study of the Cenomanian rocks in the southeastern tip of the Bohemian Cretaceous Basin. The smaller lithological units A-L have been distinguished within the Perus (A-H) and Korycany (I-L) Formations, The age of the basal strata (unit A) of the Peruc Formation is considered to be early Cenomanian. The palynoflora of the Korycany Formation reflects a marine, subtidal environment of deposition. Angiosperm pollen consisting of psilate to reticulate triangular tricolporates, brevaxones (Bolchovitineaaepollenites sp.) and triporates from the Normapolles Group - (Complexiopollis vulgaris) are present in unit I and J. the stratigraphically significant bivalve Inoceramus (?Mytiloides) crippsi Mantell has been recognized at the base of unit J. The Peruc palynoflora was deposited under salt marsch, tidal flat to freshwater swamp conditions (Čech and Svobodová, in press).
   An interesting pollen assemblage of angiosperms is present at the base of the boreholes V-127, V-134 and V-135 (unit A): both monocotyledonous (reticulate monoculcate Liliacidites sp.) and dicotyledonous (smooth tricolpate "Tricolpopollenites" parvulus and reticulate tricolpate Tricolpites minutus, Tricolpites micromunus, "Retitricolpites" georgenis) angiosperm pollen and permanent tetrad of Dicotetradites sp. Theses are the oldest angiosperm pollen which have been recovered from Cretaceous deposits in the Bohemian Cretaceous Basin
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    7. 12. 2007
Import date
    8. 8. 2012