Temat: paleogeografia - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Pre-Variscan palaeogeographical structures in the Cantabrian Zone, Spain: some critical considerations regarding their origin, location and significance
Autorzy:: Van Loevezijn, Gerard B.S.
Powiązania:: https://bibliotekanauki.pl/articles/24201074.pdf
Data publikacji:: 2023
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: Devonian
palaeogeography
Variscan orogeny
Alpine deformations
dewon
paleogeografia
orogeneza waryscyjska
deformacje alpejskie
Opis:: An update of the main Devonian pre-Variscan palaeogeographical features of the southern Cantabrian Zone is presented. The approximal locations of these features are recorded in sections studied, with thin, incomplete developments for the highs and thick successions for the troughs. Generally, pre-Variscan palaeogeographical features were affected by Variscan and Alpine orogenic deformations, but with a different impact. Oroclinal bending, tectonic shortening by thrusts, movements along strike-slip faults and bending by folds all affected the Devonian palaeogeographical features, and only an approximation of their location and shape can be given. Nevertheless, the palaeogeography recorded in pre-Variscan sedimentary successions and their relative positions, provide specific, clear and objective evidence of the pre-Variscan elements.
Źródło:: Geologos; 2023, 29, 2; 77--97
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Differences in the regional stratigraphy of NE Poland caused by vertical movements due to glacioisostasy
Autorzy:: Morawski, Wojciech
Powiązania:: https://bibliotekanauki.pl/articles/94406.pdf
Data publikacji:: 2009
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: neotectonics
Polska
Pleistocene
stratigraphy
palaeogeography
glacioisostasy
neotektonika
Polska
plejstocen
stratygrafia
paleogeografia
glaciizostazja
Opis:: Geological mapping in combination with geophysical investigations and borehole analyses show differences of the Pleistocene between the Warmia and Mazury palaeogeographic provinces in NE Poland. The (more western) Warmia province has a crystalline basement that is covered by a folded sedimentary succession of 2-4 km thick. The (more eastern) Mazury province (eastern) has a basement that forms part of the rigid East European crystalline craton, which is covered by a sedimentary cover of only 1-1.5 km thick. Cyclic loading by the Pleistocene ice sheets in this area induced glacioisostatic processes of different intensities, resulting in changing palaeogeographic conditions. The changes were increased by intense neotectonic activity that was induced by the ice sheets in the intermediate zone between the two provinces, stretching along the western slope of the crystalline craton. Significant part of intermediate zone forms a belt of crevasse-infill landforms deposited between the Warmia and Mazury lobes of the last glaciation. Studied deposits reveal a cyclic reactivation of the interlobe zone during the successive Pleistocene glaciations. Considerable variations of the relief of the top-Neogene, vertical discontinuities cutting the Pleistocene and Neogene, stratigraphic gaps within the Pleistocene succession, and thick glaciolacustrine successions result from the vertical neotectonic movements in the intermediate area between the two provinces.
Źródło:: Geologos; 2009, 15, No. 3-4; 235-250
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The palaeogeographical background of Late Devonian storm events in the western part of the Holy Cross Mountains (Poland)
Autorzy:: Vierek, Aleksandra
Powiązania:: https://bibliotekanauki.pl/articles/94589.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: carbonate tempestites
tropical hurricanes
tsunami
palaeogeography
Late Devonian
Holy Cross Mountains
Polska
tropikalne huragany
paleogeografia
późny dewon
Góry Świętokrzyskie
Polska
Opis:: Late Devonian coarse-grained carbonate deposits in the Holy Cross Mountains were studied for possible storm depositional systems and catastrophic tsunami events, as it must be assumed that the investigated area was strongly affected by tropical hurricanes generated in the open ocean North of Gondwana. This assumption appears consistent with diagnostic features of carbonate tempestites at several places in the Holy Cross Mountains. Sedimentary structures and textures that indicate so are, among other evidence, erosional bases with sole marks, graded units, intra- and bioclasts, different laminations and burrowing at the tops of tempestite layers. It has been suggested before that a tsunami occurred during the Late Devonian, but the Laurussian shelf had an extensional regime at the time, which excludes intensive seismic activity. The shelf environment also excluded the generation of tsunami waves because the depth was too shallow. Additionally, the Holy Cross Mountains region was surrounded in the Devonian by shallow-marine and stable elevated areas: the Nida Platform, the Opatkowice Platform and the Cracow Platform to the South, and the elevated Lublin-Lviv area to the NE. Thus, tsunami energy should have been absorbed by these regions if tsunamites would have occurred.
Źródło:: Geologos; 2013, 19, 4; 257-272
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

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