Jens Poßekel

Jens Poßekel
Geophysik Poßekel

About

20
Publications
1,058
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8
Citations
Citations since 2017
20 Research Items
8 Citations
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20172018201920202021202220230123456

Publications

Publications (20)
Poster
Full-text available
The poster is a critical discussion of an article by Kenkmann et al. (GSA Bulletin, 2022). In the article, the Wyoming crater strewn field is declared to be a field of impact secondary craters from an unidentified primary crater. Our poster rejects this interpretation as consistently methodologically problematic to absolutely untenable. Many of the...
Conference Paper
Full-text available
Introduction: ln 2022, an article was published in the GSA Bulletin [1] claiming that a secondary crater field of a major impact structure has been detected for the first time in the state of Wyoming in the United States, as has long been known from the Moon, other planets, and their moons. 31 craters are confirmed by shock effects, and more than 6...
Article
Full-text available
Secondary craters in impacts on moon, planets and their moons are a well known phenomenon, which has been investigated many times. In the article commented by us here, the authors report on a crater strewn field in the American state of Wyoming, which is interpreted as a field of secondary craters of a so far unknown larger primary impact structure...
Conference Paper
Full-text available
The Pleistocene/Holocene Saarland impact in Germany near the French border has been an established event for several years with the existence of two craters with diameters of about 200 m (Nalbach) and Saarlouis (2.3 km). Finds of abundant melt rocks and glasses in an extensive strewn field with typical impact features (e.g. suevites) strengthened t...
Poster
Full-text available
Ground Penetrating Radar (GPR) Measurements - Rim Wall and Ejecta Blanket - Saarlouis (Saarland, Germany) Impact Crater
Conference Paper
Full-text available
Introduction: A situation that has been controversial and problematic for geologists as an alien element for a very long time exists in northern Germany on the border with Poland (Fig. 1) with an extremely unusual geomorphological feature that is linked to the very conflicting explanatory models of tectonic origin or glacial formation. These basica...
Conference Paper
Full-text available
Introduction: The Ries crater impact structure in Germany measuring about 25 km in diameter, formed almost 15 million years ago in the Upper Miocene. In the early seventies, when the Ries impact origin began to replace the earlier volcanic explosion theory among most geologists, research results of the reputable Ba- varian geologist Erwin Rutte cau...
Conference Paper
Full-text available
Impact cratering generally distinguishes between simple, bowl-shaped small craters and larger complex structures with a central peak and/or inner rings. In the modification stage of the latter, the transient crater is largely re-filled by centripetal movements particularly due to gravitational collapse of the crater rim. The transition from simple...
Conference Paper
Full-text available
High resolution ground penetrating radar (GPR) measurements over craters of the Holocene Chiemgau impact meteorite crater strewn field reveal instructive images of complex structures and chronological sequences during excavation.
Conference Paper
Full-text available
The Digital Terrain Model (DTM) of craters in the Chiemgau meteorite impact strewn field with extreme topographic resolution excludes anthropogenic and glacial origin in principle and provides insight into unusual formation processes.
Conference Paper
Full-text available
Spallation is a well-known process in technical fracture mechanics. It describes strong tensile pulses, reflected from incident compression pulses at free surfaces, which can lead to decisive material damage due to the usually significantly lower tensile strength. In meteoric impacts with shock propagations, they play an important role in all dimen...
Poster
Full-text available
Spallation is a well-known process in technical fracture mechanics that describes the particularly destructive effect of dynamic tensile stresses as a result of reflected dynamic compressive stresses. In meteorite impacts, it is primarily reflected shock waves (rarefaction waves) that leave their mark in dimensions from mega to micro. We describe t...
Poster
Full-text available
Plain Language Summary Geophysical measurements have revealed widespread heavy disturbances of underground rocks by the highly energetic collision of a big cosmic body with the earth’s surface in a young meteorite impact event. Today, 2,500 - 3,000 years later, prominent sinkhole phenomena (sudden terrain collapses), for a long time enigmatic to ge...

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Projects

Project (1)
Project
For about 15 years the Holocene Chiemgau Impact has been studied by a group of scientists including geologists, geophysicists, mineralogists, petrographers, geochemists, astronomers, archaeologists, soil scientists, geomorphologists and historians. After initial fierce opposition from the "impact community" and from the camp of local and regional ice age geologists, the impact has been established with a sum of highly spectacular finds and features published at international congresses and in peer-reviewed journals. Current research focuses mainly on mineralogical analyses of meteorite material, on precise documentation of crater structures with the Digital Terrain Model, and on geophysical measurements.