Lithological-geochemical, petro mag netic and paleoecological characteristics of sedimentational conditions for the Ulyanovsk-Saratov foredeep at Campanian-Zelandian time
In: Moscow University Bulletin. Series 4. Geology, Heft 5, S. 27-38
Results of the complex research of the carbonate rhythmically bedded section of the cement factory quarry of the Sengeley town of the Ulyanovsk province are presented. Description of cyclically bedded silicious member of Lower Paleocene is presented. For rhythmic and cryptorhythmic Upper Cretaceous and also cyclic Lower Paleocene deposits conditions of it origin by use of a complex of methods including lithological, petrographic, petromagnetic, geochemical, chemical and paleoecological ones, are reconstructed for the first time. Dilution and eustatic cycles, caused by eccentricity cycles of the Earth`s orbit became an agent forming rhythmicity. The last are determined in the cryptorhythmic lanceolata member of the Lower Maastrichtian.