Stratygrafia i korelacja utworów środkowego dewonu Pomorza Środkowego na podstawie analizy palinologicznej
Abstract
PALYNOLOGICAL STRATIGRAPHY AND CORRELATION OF THE MIDDLE DEVONIAN DEPOSITS OF CENTRAL POMERANIA (NORTH POLAND)
Summary
Middle Devonian miospore assemblages from subsurface of Western Pomerania NW Poland (Fig. 1) are assigned (Fig. 2A, 2B) to the Rhabdosporiteslangii and Aneurosporaextensa zones of the East European miospore zonation scheme [1]. The presence of the former zone is indicated by the occurrence of Densosporitesdevonicus Richardson, Cirratriraditesmonogrammos (Arkhangelskaya) Arkhangelskaya, and Rhabdosporiteslangii (Eisenack) Richardsonsensu Marshall and Allen. The presence of thelatter zone is indicated by the occurrence of GeminosporalemurataBalme emend. Playford, Aneurosporaextensa(Naumova) Turnau and Geminosporadecora (Naumova) Arkhangelskaya. The lower (EX 1), middle (EX 2), and upper (EX 3) local sub zones of theextensa Zone are distinguished (Fig. 2B, Table 1). The bases of these subzones are marked by the first appearances of Geminosporalemurata, Chelinosporaconcinna Allen and Samarisporitestriangulatus Allen respectively. Strati graphical ranges of selected miospore species within the zones and sub zones are shown in Table 1. Basing on the miospore evidence, the Eifelian/Givetianboundary (sensu [2]) is placed in the upper part of the Studnica Complex (Fig. 2A), at the first appearance of Geminosporalemurata. The uppermost part of this complex, and the Jamno, Miastko andSianowo complexes are assigned to the Givetian. Givetian age of the Tuchola, Silno and Chojnice complexes is also suggested. This is in agreement with the previous faunal evidence [3, 8, 10, 11, 14, 23], except for the tabulate coral data [17]. The palynologicaldata suggest that the base of the Miastko complex between Stobno and Miastko is diachronous and the base of the Sianowo complex between Jamno and Koczala is isochronous (Fig. 2A). The studiedlithostratigraphical complexes are time equivalents of the Narova, Arukuta and Burtyniek horizons of the Baltic synec1ise (Fig. 3).
Summary
Middle Devonian miospore assemblages from subsurface of Western Pomerania NW Poland (Fig. 1) are assigned (Fig. 2A, 2B) to the Rhabdosporiteslangii and Aneurosporaextensa zones of the East European miospore zonation scheme [1]. The presence of the former zone is indicated by the occurrence of Densosporitesdevonicus Richardson, Cirratriraditesmonogrammos (Arkhangelskaya) Arkhangelskaya, and Rhabdosporiteslangii (Eisenack) Richardsonsensu Marshall and Allen. The presence of thelatter zone is indicated by the occurrence of GeminosporalemurataBalme emend. Playford, Aneurosporaextensa(Naumova) Turnau and Geminosporadecora (Naumova) Arkhangelskaya. The lower (EX 1), middle (EX 2), and upper (EX 3) local sub zones of theextensa Zone are distinguished (Fig. 2B, Table 1). The bases of these subzones are marked by the first appearances of Geminosporalemurata, Chelinosporaconcinna Allen and Samarisporitestriangulatus Allen respectively. Strati graphical ranges of selected miospore species within the zones and sub zones are shown in Table 1. Basing on the miospore evidence, the Eifelian/Givetianboundary (sensu [2]) is placed in the upper part of the Studnica Complex (Fig. 2A), at the first appearance of Geminosporalemurata. The uppermost part of this complex, and the Jamno, Miastko andSianowo complexes are assigned to the Givetian. Givetian age of the Tuchola, Silno and Chojnice complexes is also suggested. This is in agreement with the previous faunal evidence [3, 8, 10, 11, 14, 23], except for the tabulate coral data [17]. The palynologicaldata suggest that the base of the Miastko complex between Stobno and Miastko is diachronous and the base of the Sianowo complex between Jamno and Koczala is isochronous (Fig. 2A). The studiedlithostratigraphical complexes are time equivalents of the Narova, Arukuta and Burtyniek horizons of the Baltic synec1ise (Fig. 3).