ERNSTSON CLAUDIN IMPACT STRUCTURES – METEORITE CRATERS

New Poster American Geophysical Union AGU 2023

https://agu23.ipostersessions.com/default.aspx?s=43-6E-0F-83-A7-FF-F4-51-24-3E-30-82-30-09-EE-C7&guestview=true

The Enigmatic Luzice (Czech Republic) Megablock and Melt Rock Megabreccia: Evidence of a Meteorite Impact Origin click PDF

Kord Ernstson, Jens Poßekel, Karel Ventura, and Martin Molnár

Abstract: 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.

The Canadian Earth Impact Database, Wikipedia and the Azuara and Rubielos de la Cérida (Spain) Impact Case click PDF

F.M. Claudin and K. Ernstson

Abstract: We report on the mid-Tertiary multiple Azuara impact event (Spain) with the Azuara impact structure and the Rubielos de la Cérida impact basin and the chequered history of their discovery and their place in impact research.

A peer-reviewed journal collection covering all aspects of airbursts and impacts on Earth by Comets and Asteroids – Click the image to enter this new world of impact research.

Under the auspices of the ScienceOpen platform, this new journal provides a publication forum that is arguably unparalleled within the global impact research community. Designed as an open access journal with free access to any size readership, this journal for high quality contributions is a response to what a new report (1/4/2023) in the journal NATURE described as a sharp increase in the number of purely scientific and technical articles in recent decades, with a drastic decline in submitted articles pointing in new, exciting, “disruptive” directions. This development is unfortunately accompanied by increasingly incompetent and partially manipulated peer review processes, for which there is some thought-provoking evidence directly addressed here. What expresses this alarming development better than that at MDPI journals the Editorial Board at Minerals, for example, has 405 members and the Reviewer Board 274 members, and at Geosciences 300 members occupy the Editorial Board and 198 members the Topical Advisory Panel.

This new journal will have a different character, and a detailed introduction and overview (aims and scope, article submission, published articles statistics, peer review processes, and more) is provided by clicking on the image above. A special feature is already added here that the journal also consideres quality posters and iPosters accepted from meetings (e.g. LPSC, AGU Fall Meeting, MetSoc Meeting) for publication in this journal.

People experienced the prehistoric Chiemgau meteorite impact – geoarchaelogical evidence from southeastern Germany: a review

Barbara Rappenglück, Michael Hiltl, Jens Poßekel, Michael Rappenglück, Kord Ernstson

Mediterranean Archaeology and Archaeometry, 23, No. 1, 209-234, 2023.

http://maajournal.com/Issues/2023/Vol23-1/8_Rappengluck_et_al_23(1).pdf (full article free open access)

Abstract. – 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 established evidence that two prehistoric human settlements have been affected by the Late Bronze Age/Early Iron Age (ca. 900-600 BC) Chiemgau meteorite impact in southeastern Germany. One site, the Mühlbach area, was affected by the ejecta from the 600 m Ø-Tüttensee crater, one of the largest craters in a crater strewn field measuring about 60 x 30 km. At the other site, Stöttham close to Lake Chiemsee, the catastrophic layer of the impact was found embedded in the archaeological stratigraphy of a settlement, which had been repeatedly occupied from the Neolithic to the Roman era. At both sites, artifacts have become components of impact rocks, establishing a hitherto unknown form of an impact rock, an artifact-in-impactite. The immediate coexistence of rocks, which exhibit impact-diagnostic shock metamorphism, with relicts of metallic artifacts, as encountered in finds from Stöttham, are unprecedented evidence of human experience of a meteorite impact.

Pingos and mardels: high-resolution digital terrain models suggest meteorite impact craters in addition to permafrost, sinkhole and dead-ice formation models.

Kord Ernstson1 and Jens Poßekel2

Abstract. – 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 established ideas and textbook wisdom. Such a paradigm shift is especially indicated in ice age research and more generally in the still open discussion of the formation of smaller terrain forms in the manner of general and diverse depressions. With the new possibilities of the DTM a new “contender” has entered the discussion, which was already considered as a cause sporadically in former times, since relatively short time with the extreme terrain resolution of the DTM has led to completely new ways of consideration. This article reports about it with the finding that impact craters may be the more reasonable explanation for previously assumed pingos, mardels in the general sense, and dead ice holes.

Keywords: Pingo, mardel, sinkhole, dead ice hole, meteorite crater, impact crater strewn field, impact airburst

____________________________________________

1University of Würzburg, D-97074 Würzburg, Germany, kernstson@ernstson.de; 2Geophysik Poßekel Mülheim, Germany, jens.possekel@cityweb.de.

PDF DOWNLOAD

1 Introduction

Pingos are mounds of earth formed in permafrost. The interior of the mound consists of an ice core, and they have a circular or oval shape and can reach a diameter of up to several hundred meters and a height of up to several dekameters. When the ice core melts, the pingo collapses and forms a depression in the ground called a pingo ruin. A common explanation of ice core formation is artesian rising warmer waters in the permafrost, which freeze there and are successively pushed further and further up as a massive core.

Continue reading “New Article: Pingos, Mardels and Meteorite Impact Craters”

Comment on

Brenker, F.E., Junge, A.. (2023) Impact origin of the “Domaine du Meteore”-crater, France. Compelling mineralogical and geophysical evidence for an unrecognized destructive event in the heart of Europe. – 54th LPSC, #1910. www.hou.usra.edu/meetings/lpsc2023/pdf/1910.pdf

by Kord Ernstson, University of Würzburg, Germany

Abstract . – The claim that the vineyard crater is the fourth proven impact crater in Western and Central Europe after Rochechouart, Ries, and Steinheim is a fundamental scientific misstatement because the impacts and impact crater.strewn fields (Chiemgau, Saarland, Czech Republic) that have been researched and published for 15 years with all proven and scientifically accepted impact criteria is hushed up. The Canadian Earth Impact Database is basically denied the legitimacy to asssess and comment with pros and cons on scientific work and publications.

At this year’s Lunar & Planetary Science Conference there is the above quoted abstract contribution by the authors F.E. Brenker and A. Junge from the University of Frankfurt. The relatively small crater with a diameter of about 200 m has already been discussed as a meteorite crater for more than 70 years by different authors, but this has always been discarded. The present contribution from Frankfurt describes a new investigation, which establishes the meteoritic origin according to known impact criteria. The abstract article convincingly describes the impact origin with topographic, geophysical, and mineralogical findings and evidence, and arouses curiosity for a comprehensive conference poster and article that may be planned.

The article is commented on for a different reason. It begins by stating that the French crater is significant in that it joins the few three impact craters so far proven in Western and Central Europe, namely

Continue reading “Domaine du Météore crater, France – Comment on the LPSC 2023 article”