Autor: Gradziński, R. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Origin of calcite-cemented Holocene slope breccias from the Długa Valley (the Western Tatra Mountains
Autorzy:: Gradziński, M.
Jach, R.
Stworzewicz, E.
Powiązania:: https://bibliotekanauki.pl/articles/191437.pdf
Data publikacji:: 2001
Wydawca:: Polskie Towarzystwo Geologiczne
Tematy:: slope breccias
calcite cements
radiocarbon dating
Holocene
Tatra Mts.
Opis:: New locality of slope breccias was found in the Western Tatra Mts. It occures in the Długa Valley on a steep slope of ravine beneath the belt of Jurassic radiolarite cliffs. The brecccia consists of angular clasts of radiolarite bound with calcite cements. Void spaces between the clasts contain shells of Holocene snails. The cements are built of columnar crystals composed of acicular subcrystals and of skeletal crystals. The crystals grew rapidly from supersaturated solution due to CO2 degassing. Cementation occurred in vadose conditions in the Atlantcic Phase soon after the scree formation.
Źródło:: Annales Societatis Geologorum Poloniae; 2001, 71, No 2; 105-113
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Morphotype variation of orthophragminids as a palaeoecological indicator: A case study of Bartonian limestones, Pod Capkami Quarry, Tatra Mts, Poland
Autorzy:: Machaniec, E.
Jach, R.
Gradziński, M.
Powiązania:: https://bibliotekanauki.pl/articles/191441.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Geologiczne
Tematy:: Larger benthic foraminifera
orthophragminids
morphotype
transgression
palaeoenvironment
Eocene
Tatra Mts.
Western Carpathians
Opis:: Nummulites-Discocyclina bioclastic packstone and Discocyclina rudstone occur in the transgressive sequence of the Middle–Upper Eocene deposits in the Tatra Mts. The succession of the studied facies is a direct response to a rapid environmental change, related to progressive deepening. Facies transition from Nummulites- Discocyclina bioclastic packstone of proximal mid-ramp to Discocylina rudstone of distal mid- and outer-ramp is an exemplary record of a deposition during deepening conditions. Increasing of diversity of the genus Discocyclina, decreasing of diversity of other foraminifera up the section and vertical variation of orthophragminid mor- photypes from the ovate- through saddle- to the disc-shaped tests are related to deepening and shadowing of the depositional environment.
Źródło:: Annales Societatis Geologorum Poloniae; 2011, 81, No 2; 199-205
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Dostawca treści:: Biblioteka Nauki

Artykuł

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