Acta Botanica Croatica, Vol. 60 No. 1, 2001.
Izvorni znanstveni članak
Siliceous phytoplankton assemblage from Sarmatian beds in the Markuševec area (Mt. Medvednica, NW Croatia)
Ines Galović
; Institute of Geology, Zagreb, Croatia
Sažetak
The section of sedimentary profile that has been investigated is located on the southwest part of Mt. Medvednica, in the Markuševec area. This paper focuses on paleontological analysis and the identification of the siliceous phytoplankton (silicoflagellates, diatoms) composition of Sarmatian sediments (marls, clays) in the geological column Mrzljak. The Distephanus longispinus Zone has been proposed, on the basis of the silicoflagellate index taxa and their assemblage, for the upper part of the Middle Miocene. Fourteen diatom species have been found for the first time in this region: Coscinodiscus rothii (Ehrenberg) Grunow, C. subtilis Ehrenberg, Actinoptychus senarius (Ehr.) Ehrenberg, A. heliopeltci Grunow, Actinocyclus octanarius var.. tenella (Brebisson) Hendey, A. tenellus (Breb.) Andrews, Anaulus simplex Hajós, Bacteriastrum various Lauder, Grammatophora macilenta var. subtilis Grunow, Cocconeis scutelliun var. scutellum Sheshuk, Diploneis subovalis Cleve, Navícula marina Ralfs, Nitzchia imperforata Andrews and Delphineis lineata Andrews. A few ebridians, such as: Hermesinum adriaticum Zucharias, Ebria triparita (Schum.) Lemmermann, Cardiuifolia gracilis Hovasse and Ammodochium prismaticum Hovasse, and one endoskeletal dinoflagellate Actiniscuspentasterias Ehrenberg were determined.
Ključne riječi
silicoflagellates; fossil diatoms; Sarmatian; Markuševec; Croatia
Hrčak ID:
160802
URI
Datum izdavanja:
31.12.2001.
Posjeta: 821 *