Modavite finds in Middle Miocene (Langhian Stage) deposits of southwestern Poland

Brachaniec, Tomasz

doi:10.2110/carnets.2020.2012

Cited by 2 publications

(4 citation statements)

References 18 publications

(24 reference statements)

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“…Only a few European moldavite‐bearing formations display a similar age to that of the suspected moldavite‐bearing formation (Trnka and Houzar 2002; Ševčík et al. 2007; Brachaniec 2020): the Vrábče layers (Domanin Fm.) in southern Bohemia, colluvio‐fluvial clays with sandy gravels near Slavice and Třebíč in western Moravia, the Imfritz‐Radessen Formation.…”

Section: Discussionmentioning

confidence: 95%

“…This situation occurred in most cases on the European strewn field (Trnka and Houzar 2002;Brachaniec et al 2014Brachaniec et al , 2015Brachaniec et al , 2016Brachaniec 2017;Szopa et al 2019). Only a few European moldavite-bearing formations display a similar age to that of the suspected moldavite-bearing formation (Trnka and Houzar 2002;Sev c ık et al 2007;Brachaniec 2020): the Vr ab ce layers (Domanin Fm.) in southern Bohemia, colluvio-fluvial clays with sandy gravels near Slavice and T reb ı c in western Moravia, the Imfritz-Radessen Formation.…”

Section: Discussionmentioning

confidence: 99%

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A scheme for moldavite fluvial abrasion based on observations from a natural river stream

Brachaniec

2020

Meteorit & Planetary Scien

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Tektite resistance to fluvial abrasion has become the core issue of several recent papers. Because of contradictory results of barrel observations, the experiment at hand was conceived and implemented. Monitored fluvial abrasion of moldavites had been carried out in a natural river stream. The subsequent results differ significantly from those obtained from barrel experiments. Moldavites can successfully survive reworking over a distance of several 100 km. The slightest loss in glass mass takes place during first 30% of reworking distance and is definitively not related to the original shape and/ or ornamentation.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

A scheme for moldavite fluvial abrasion based on observations from a natural river stream

Brachaniec

2020

Meteorit & Planetary Scien

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“…East and northeast of the Ries, ejecta occur in synchronous sedimentary realms, such as the South Bohemian basin, the Moravian Carpathian foreland basin, and at the southeast margin of the Northwest European Tertiary basin. These occurrences are well known for the moldavites—the tektites of the Central European strewn field (e.g., Bouška, 1972, 1998; Brachaniec, 2020; Hurtig, 2017; Koeberl et al., 1988; Lange, 1995). They are mainly green to brown‐colored glasses, which occur in several larger assemblages (“substrewn fields”) over a total area of about 10,000 km 2 at distances between 200 and 500 km east and northeast of the Ries crater (see Table 1).…”

Section: Impact Indications In Synchronous Sedimentary Basinsmentioning

confidence: 91%

“…This change is thought to have been triggered by a shift in the course of the Enns River due to an impact-induced rock fall within the Alps. a Trnka and Houzar (2002), Hurtig (2017), Brachaniec (2020).…”

Section: Rock Fall and Change Of The Heavy Mineral Compositionmentioning

confidence: 99%

The Ries impact and its distal effects in sediments of Central Europe—A review

Lange

Suhr

2023

Meteorit & Planetary Scien

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The Ries impact is the most important cosmic event in the younger geological history of Europe. Its effects reach far beyond the area considered so far and are documented in manifold evidence. In this paper, the widely scattered reports in the literature are compiled and supported with investigations by the authors. Besides well-known ejecta features like the Brockhorizont, Reuter's blocks, and moldavites, little known or forgotten indications, like a lechatelierite and b-cristobalite occurrence in Bavaria and unusual sedimentation phenomena in northern Germany, are presented. The paleogeographic reconstruction shows that the Ries impact occurred on the southern side of the Neogene Central European mainland. Large parts of this erosional area were devastated by the impact. Pressure waves and thermal radiation had a lasting effect on the landscape within hundreds of kilometers around the impact site. Destruction of the vegetation cover by impact-induced storms, wildfires, and heavy rainfall generated intense erosion. The adjacent sedimentation area to the north (Paleo-North Sea) experienced an increased and short-term supply of terrestrial debris to the marine environment. The stratigraphic coincidence of these exceptional sediments with the Ries event leads us to conclude that the distal effects of the impact are present here, which have so far received little or no attention in this context. The paper considers the different indications and sets them in a large-scale context.

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Modavite finds in Middle Miocene (Langhian Stage) deposits of southwestern Poland

Abstract: Mo ol ld da av vi it te e f fi in nd ds s i in n M Mi id dd dl le e M Mi io oc ce en ne e ((L La an ng gh hi ia an n S St ta ag ge e)) d de ep po os si it ts s o of f s so ou ut th hw we es st te er rn n P Po ol la an nd d

Cited by 2 publications

References 18 publications

A scheme for moldavite fluvial abrasion based on observations from a natural river stream

A scheme for moldavite fluvial abrasion based on observations from a natural river stream

The Ries impact and its distal effects in sediments of Central Europe—A review

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