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Wyszukujesz frazę "Karwowski, L." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
New moldavites from SW Poland
Autorzy:
Brachaniec, T.
Szopa, K.
Karwowski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/138869.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
moldavites
tektites
ries
fluvial transport
Miocene
Polska
mołdawit
tektyty
transport rzeczny
miocen
Polska
Opis:
Four newly discovered moldavites from the East and West Gozdnica pits, SW Poland, are characterized. All specimens, including other four, reported earlier, are from Upper Miocene fluvial sediments of the Gozdnica Formation. Their weight varies between 0.529 and 1.196 g. The moldavites are bottle green in colour and have bubbles and inclusions of lechatelierite. Low degree of corrosion suggests short river transport, apparently eastward from Lusatia.
Źródło:
Acta Geologica Polonica; 2016, 66, 1; 99-105
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The first Polish tektites: preliminary SEM investigation
Autorzy:
Brachaniec, T.
Szopa, K.
Karwowski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/100790.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Śląski. Wydział Nauk o Ziemi
Tematy:
tektyt
mołdawit
Dolny Śląsk
Polska
tektite
moldavite
strewn field
crater
Ries
Polska
Opis:
In Lower Silesia, the first Polish moldavites were discovered. To recognize the primary chemical composition and check the morphology of investigated material SE and BSE images were used. The samples show presence of vesicles, which are one of the most typical features of tektite glass. Referring to the preliminary EDS results and comparing them with literature data, it can be assumed that in all cases the base material for all known moldavites was the same.
Źródło:
Contemporary Trends in Geoscience; 2013, 2, 1; 18-21
2299-8179
Pojawia się w:
Contemporary Trends in Geoscience
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spherules associated with the Cretaceous–Paleogene boundary in Poland
Autorzy:
Brachaniec, T.
Karwowski, Ł.
Szopa, K.
Powiązania:
https://bibliotekanauki.pl/articles/139277.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Cretaceous-Paleogene boundary
Polska
Spherule
microkrystites
impact origin
Ni-rich spinels
smectite
kreda
paleogen
granica
Polska
geneza uderzeniowa
smektyty
Opis:
The succession of the Lechówka section near Chełm in south-eastern Poland presents the first complete record of the Cretaceous–Paleogene (K–Pg) boundary in Poland. Samples of the boundary clay were examined for microtektites and shocked minerals to confirm the impact origin of the sediment. The spheroidal fraction reveals morphological and mineralogical features, e.g., spherules, similar to material from the K–Pg boundary as described from elsewhere. The impact genesis of the spherules is confirmed by the presence of nickel-rich spinel grains on their surfaces. The spinels are considered to be primary microlites and, thus, the spherules at Lechówka can be classified as microkrystites. No shocked minerals were noted. The deposits with spherules comprise Aland Mg-rich smectite (Cheto smectite). This almost pure Mg-rich smectite, forming up to 100% of the clay fraction, derived from the weathering of the impact glass. It is proposed that the spherules isolated from the Cretaceous-Paleogene boundary clay at Lechówka come from the Chicxulub crater in Mexico.
Źródło:
Acta Geologica Polonica; 2014, 64, 1; 99-108
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Origin of parautochthonous Polish moldavites : a palaeogeographical and petrographical study
Autorzy:
Szopa, K.
Badura, J.
Brachaniec, T.
Chew, D.
Karwowski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/191842.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Polish tektites
redeposition
river terrace
Miocene
Pleistocene
drainage basin
Opis:
In this article, the most recent moldavite discoveries in Poland and their host sediments are characterised and discussed. They were discovered at Lasów, located about 8 km north of Zgorzelec (Poland) and Görlitz (Germany), about 700 m from the Polish-German border, close to the Lusatian Neisse (Nysa) River. The tektites were collected from Vistulian (Wiechselian) glacial age sand and gravel of a closed quarry pit, associated with the river terraces. In the Lasów area, the moldavite-bearing sediments are Pleistocene in age and represent Lusatian Neisse terrace deposits. They were redeposited from the upper part of the drainage basin of the Lusatian Neisse, probably washed out from the Miocene sediments that filled the Zittau Depression, the Berzdorf–Radomierzyce Depression, the Višňová Depression and the tectonically uplifted Izera Mts. and Działoszyn Depression. The erosion of Miocene deposit occured on a large scale in the uplifted foothills of the Upper Miocene Izera, Lusatia and Kaczawa complexes. The sediment cover was removed from the Działoszyn Depression. The drainage basin of the Lusatian Neisse is the area where moldavites were formed by the Nördlinger Ries impact. The source area of moldavite is the same for the Miocene deposits around Gozdnica, as well as for the Pleistocene sediments at Lasów.
Źródło:
Annales Societatis Geologorum Poloniae; 2017, 87, 1; 1-12
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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