Acta Geologica Polonica 

About: Acta Geologica Polonica is an academic journal published by De Gruyter. The journal publishes majorly in the area(s): Devonian & Cretaceous. It has an ISSN identifier of 0001-5709. It is also open access. Over the lifetime, 1424 publications have been published receiving 18340 citations.

Upper Devonian conodonts, stratigraphy and facial development in the Holy Cross Mts

Abstract: The problems of stratigraphy, facial differentiation and the history of sedimentation of the Upper Devonian in the western part of the Holy Cross Mts (Central Poland) are the subject of the paper. The stratigiraphical subdivision have been based on the conodonts. All platform conodonts and a few other, stratigraphically important species have been monographed. Of the 80 species described (together with subspecies) which are assigned to 11 genera, the following five species or subspecies are new: Ancyrodella sinecarina sp. n., Palmatolepis circularis sp. n., Palmatolepis minuta wolskae subsp. n., Polygnathus sinuosus sp. n. and Pelekysgnathus ? sp.n. The conodont zonation, adopted for the correlation of profiles, enabled the solution of several problems of regional stratigraphy. The history of the Frasnian and Famennian sedimentation has been restored on the basis of their facial (including microfacial) analysis.

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.

Pueblo, Colorado, USA, candidate Global Boundary Stratotype Section and Point for the base of the Turonian Stage of the Cretaceous, and for the base of the Middle Turonian Substage, with a revision of the Inoceramidae (Bivalvia)

Abstract: An updated account of the candidate Global Boundary Stratotype Section and Point for the base of the Turonian Stage and the base of the Middle Turonian Substage in the Bridge Creek Member of the Greenhorn Limestone exposed in the Rock Creek Anticline west of Pueblo, Colorado is provided. Key ammonite distributions are revised and marker species illustrated. A taxonomic revision of the uppermost Cenomanian to lower Middle Turonian bivalve family Inoceramidae provides, for the first time, an adequately documented detailed zonation for the interval in the form of five successive partial range zones based on species of the genus Mytiloides . These are successive zones of M. hattini ELDER (uppermost Cenomanian), M. puebloensis n.sp., M. kossmati (HEINZ), M. mytiloides (MANTELL) (all Lower Turonian) and M. subhercynicus (SEITZ) (lower Middle Turonian). The base of the Turonian, defined by the first appearance of the ammonite Watinoceras devonense WRIGHT & KENNEDY at the base of bed 86 of the Bridge Creek Member corresponds to the first occurrence of Mytiloides puebloensis , and the base of the puebloensis Zone. The base of the Middle Turonian, defined by the first occurrence of the ammonite Collignoniceras woollgari (MANTELL) in bed 120 of the Bridge Creek Member is just below the first occurrence of M. subhercynicus in bed 121, and the base of the subhercynicus Zone.

Devonian/Lower Carboniferous stratigraphy, facies patterns and palaeogeography of Iran Part II. Northern and central Iran

Abstract: Apart from a few small remnants of the Turan Plate in the north, Iran during the Palaeozoic was part of the northern margin of Gondwana On the basis of 65 sections, the majority of them covering the time-span from the Late Silurian into the Early Carboniferous, the stratigraphy and facies pattern of this area have been elucidated Biostratigraphical calibration and correlation of the sections, mostly by means of conodonts and brachiopods, show the evolution from a shallow carbonate-dominated shelf in the Silurian which, by a drop of sea-level, was transformed into a siliciclastic shelf during the Early Devonian Fully marine conditions were subsequently re-established in the Middle Devonian to early Frasnian and persisted into the early Late Carboniferous A widespread uplift in the latest Carboniferous turned the entire area into a continental regime before the onset of a new marine cycle during the late Early Permian With the exception of the northern zone (Talesh Range, Aghdarband), the Palaeozoic of Iran is characterized by continental to shallow marine deposits showing that enormous portions of the northern margin of this sector of Gondwana have been subducted during the convergence of the Turan and Iran Plates and the elimination of the Palaeotethys during the Late Triassic

The Holy Cross area, Central Poland, in the Alpine cycle

Abstract: Evidence is presented that a distinct elevation never existed in the area of the present Holy Cross Mts during Permian and Mesozoic time. This area as well as that of the present San anticlinorium were embraced within the Danish-Polish trough and were subsequently subjected to tectonic inversion at the turn of the Cretaceous and Tertiary. Thus, the whole Middle-Polish anticlinorium, was generated in a similar way by Laramide movements on the site of the preceding Danish-Polish trough. Some other tectonic and paleogeographic problems, concerning mainly the Holy Cross Mts and the Middle-Polish anticlinorium, are also discussed.