Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Przegląd Geologiczny

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: Nördlinger Ries

Sortuj według:

Ogranicz wyniki do:

Nowe znaleziska polskich tektytów z obszaru niecki żytawskiej

Paszcza Karolina

Przegląd Geologiczny

2021

Vol. 69, nr 4

244--247

To date, 36 moldavites have been found in 9 sites from south-western Poland. The newest ones, i.e. 2 tektites, presented herein come from the Turów Mine in the Zittau Basin. Both moldavite specimens were collected from the fluvial sandy gravels of the Gozdnica Formation, of late Miocene age. Taking into account the macroscopic features of the studied glass, it should be assumed that one of them had been reworked over a maximum distance of several kilometres, while the other one had overcome a further reworking, not exceeding50 km though. The moldavites considered herein were most probably ejected from the Ries crater into the Zittau Basin within the Badenian sediments, later transported by the Lusatian Neisse river and finally redeposited within Pannonian sediments.

Polskie mołdawity : obecny stan wiedzy i perspektywy nowych znalezisk

Szopa Krzysztof, Brachaniec Tomasz, Karwowski Łukasz

Przegląd Geologiczny

2019

Vol. 67, nr 8

662--667

The first Polish moldavites were discovered in 2012. This paper is a summary of the distribution and inventory of these Polish tektites. Up to the present, 28 moldavites have been described from seven different sandpits. These moldavites were deposited in the upper Miocene fluvial deposits of the Gozdnica Formation, as well as in the Pleistocene river terraces. Apart from a typical bottle green colour, moldavites also have other diagnostics features for this class of tektites, such as the presence of bubbles, inclusions oflechatelierite, as well as the same, homogeneous chemical composition. Fluvial redeposition was interpreted as the main process which determined moldavite distribution. Despite the most recent find of one moldavite specimen in Bielawy, all of these specimens indicate both Lusatian as well as sub-strewn Czech fields as their supply area.