New data on the Lower Cretaceous microfossil and nannoconid stratigraphy in the Guaniguanico terrane of western Cuba

• Autorzy: Pszczółkowski A.
• Języki publikacji: EN

Abstrakty

EN

The age of some Lower Cretaceous lithostratigraphic units and their boundaries in the Guaniguanico terrane, western Cuba, is modified on the basis of calpionellids, foraminifers and nannoconids. In the Northern Rosario belt, the Artemisa/Polier formations boundary is diachronous (upper Lower Berriasian to Lower Valanginian). In the studied sites located in the Southern Rosario belt, the topmost part of the Sumidero Member of the Artemisa Formation is latest Valanginian to Hauterivian in age. Comparing this result with previous data, the Artemisa/Santa Teresa formations boundary ranges from Lower Valanginian to Hauterivian. The Late Valanginian to earliest Hauterivian age of the lowermost part of the Pons Formation in the Río Las Piedras section, Sierra de los Organos, is accepted on the basis of the planktonic foraminifers, calpionellids and nannoconids. The presence of Tintinnopsella carpathica Murgeanu et Filipescu is characteristic for the Tintinnopsella Zone. Nannoconus truittii Brönnimann, 1955, subsp. truittii Deres et Achéritéguy, 1980, is present in the Barremian-Lower Aptian assemblages. Comparing the Lower Cretaceous stratigraphic record from the Guaniguanico terrane to that registered at the Southern Gulf of Mexico basin site (Hole 535), some similarities, as well as differences, can be discerned.

Słowa kluczowe

EN

lithostratigraphy; Cuba

• Wydawca: Instytut Nauk Geologicznych PAN
• Czasopismo: Studia Geologica Polonica
• Rocznik: 1999
• Tom: Vol. 114
• Strony: 7--33

Twórcy

autor

Pszczółkowski A.

• Institute of Geological Sciences, Polish Academy of Sciences, ul. Twarda 51/55, 00-818 Warszawa, Poland,