Showing papers in "Acta Geologica Polonica in 1992"

Turonian through Santonian deposits of the Central Polish Uplands; their facies development, inoceramid paleontology and stratigraphy

Abstract: Stratigraphy, inoceramid paleontology and facies characteristics of the Turonian through Santonian deposits of the Central Polish Uplands are presented, on the basis of which 17 inoceramid zones are recognized and their position against the ammonite standard division is discussed. Apart from the Middle/Upper Santonian and Santonian/Campanian boundary all other stage and substage boundaries are well recognizable with the inoceramid fauna. Most of the inoceramids, comprising about 40 species, assigned to six genera, are monographed. Two species from the Turonian-Coniacian boundary interval are described as new: Mytiloides turonicus sp. n. and Inoceramus vistulensis sp. n. The Mytiloides labiatus group is thoroughly treated and particular members are discussed, to show that M. suhmytiloides (SEITZ) and M. subhercynicus (SEITZ), the widely cited species of this group, are invalid and thus should be rejected. The names Mytiloides opalensis sensu SEITZ (non BšSE) and M. duplicostatus sensu KAUFFMAN (non ANDERSON) are younger synonyms of M. kossmati (HElNZ). A revision of the whole genus Cremnoceramus is also presented. The stratigraphic scheme applied to the Turonian through Santonian deposits of the Central Polish Uplands allows to solve some regional problems, and to construct a unified chronostratigraphic facies scheme for the southern part of the epicontinental areas in Poland. The facies characteristics combined with the paleotectonic setting of the studied area is the base of the distinguishing of the four geotectonic-facies regions: the Circum-Sudetic Trap Basins, the Cracow Swell, the Danish Polish Trough, and the Russian Chalk Sea. The evolution of the studied areas during Turonian through Santonian time is assembled to indicate the primary role of tectonic movements of the Subhercynian phase of the Alpine orogeny.

Fish otoliths the Middle Miocene (Badenian) deposits of southern Poland

Abstract: The otoliths of teleost fishes the Middle Miocene (Badenian) marine deposits (Upper Langhian - Lower Serravalian, 15 MY ago) of southern Poland, studied in the six key sections (Korytnica Basin, Nawodzice, and Rybnica in the Holy Cross Mountains; Łychow area in the Lublin Upland; Beczyn at the Carpathian margin; Niskowa in the Carpathians), appear to significant components of diversified organic assemblages which may be interpreted in terms the composition and structure particular communities. These communities are indicative of a spectrum facies that ranges from near-shore ones, confirmed either to rocky (Korytnica) or to flat sandy shores (Nawodzice, Niskowa), through the variable offshore facies (Rybnica, Łychow), to those approaching a deep neritic or even bathyal zone (Beczyn). The systematically accounted forms, totaling over 22,600 specimens, represent 145 taxa distinguishable at their species Ievel, the three of which are viz. Micromesistius arcuatus sp. n., "genus Bythitinarum" wenglinelis sp. n., and Sciaena rybnicensis sp. n. The richest numerically and most taxonomically assemblage is that of the world-famous Korytnica Basin which contains 105 taxa belonging to 47 families. A comparison with ololiths of the present-day fishes (NOLF'S Collection) allowed to revise a number of taxa of ancient forms, and to recognize the presence of some forms formerly unknown from the fossil state. Of the revised taxa, noticeable is the well-known species " Gadus " vel " Colliolus " friedbergi , established the Polish material by CHAINE & DUVERGIER in 1928, and which revealed to be identical with Trisopterus sculptus (KOKEN, 1891). Moreover, highlighted is the occurrence species indicative of tropical and/or subtropical climatic conditions and of the lndo-Pacific bioprovince affinitties. Of such forms, significant are i.a. rare representatives of the families Chaetodontidae BONAPARTE, 1832, and Scaridae RAFlNESQUE, 1810, which are typical coral-reef dwellers in modem faunas.

A new salenioid echinoid, Salenia sigillata pozaryskae subsp.n., from the uppermost Maastrichtian of the Middle Vistula Valley, Central Poland

Abstract: A specimen of a rare species of the salenioid echinoids has been discovered in the uppermost Maastrichtian "Opoka" at Kazimierz-on-Vistula, Central Poland. It turns out to, represent a new taxon of the subspecies rank, for which the name Salenia sigillata pozaryskae subsp. n. is proposed.