Jens Poßekel

• Geophysik Poßekel

Introduction: Twenty years ago, a group of local historians and amateur archaeologists discovered what has now developed into an established, globally unique Holocene impact crater field measuring roughly 60 km x 30 km. The largest crater at that time, with the central Tüttensee and a ring wall diameter of 600 m, was established in the early days o...

The interpretation of the postulated Prosselsheim/Eisenheim impact strewn field is based on the following findings: The circular Püssensheim multi-ring structure with a diameter of 100 m for the main ring and roughly 200 m for the whole structure (see figure) with extremely small deepening has no geologically or archeologically comparable counterpa...

The article is the first part of a treatise on the large impact crater strewn field of the Holocene Chiemgau impact with a focus on the now huge number of craters, and a model description of typical examples, for which the craters #004 Emmerting, Kaltenbach and Mauerkirchen were selected here in the first part of addressing the small craters. The s...

At present, according to the Canadian database, roughly 200 craters are considered to be established impact structures worldwide, whereby the criteria for acceptance - for and against - are often regarded as extremely subjective, practiced by a very small university group, but strangely enough are regulariy used as a standard in the literature. Thi...

We report an unusual polymict melt rock megabreccia in the form of an allochthonous non-volcanic megablock within the Tertiary volcanic province of the Bohemian Massif. It is considered a relict of a suspected low-altitude airburst impact.

We report an unusual polymict melt rock megabreccia in the form of an allochthonous non-volcanic megablock within the Tertiary volcanic province of the Bohemian Massif. It is considered to be a relict of a suspected low-altitude airburst impact.

Archaeological sites undoubtedly destroyed by a meteorite impact had not been identified so far. For such a proof, both a meteorite impact and its definite effects on an archaeological site would have to be evidenced. This review article reports on geoarchaeological investigations, involving mineralogy, petrography, and geophysics, which establishe...

With the meanwhile widely available data of Digital Terrain Models (DTM) with extremely high resolution of the bare terrain surface, vertically and horizontally, down to the decimeter and centimeter range and freed from buildings and any vegetation, completely new possibilities have opened up in the geosciences, which entail paradigm shifts in esta...

Discovery and description of a 100 km-diameter probable peak ring impact structure in Northern Germany, which would be the second largest terrestrial peak ring structure.

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...

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...

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...

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...

Ground Penetrating Radar (GPR) Measurements - Rim Wall and Ejecta Blanket - Saarlouis (Saarland, Germany) Impact Crater

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...

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...

With the meanwhile widely available data of Digital Terrain Models (DTM) with extremely high resolution of the bare terrain surface, vertically and horizontally, down to the decimeter and centimeter range and freed from buildings and any vegetation, completely new possibilities have opened up in the geosciences, which entail paradigm shifts in esta...

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...

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.

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.

The asteroid impact near the Russian city of Chelya-binsk in 2013 was the largest airburst on Earth since the 1908 Tunguska event. Meanwhile, there are scien-tists who consider airburst as much more dangerous for mankind than direct projectile impacts to form meteor-ite craters [1]. In the geological past impact cratering accompanied by giant airbu...

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...

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...

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...