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Digital map 1 : 250,000 of the Azuara multiple im-pact event, which produced a crater chain of about 120 km length.
Source publication
Abstract. - We present a new compilation of previously abundantly studied and published shock effects in minerals and rocks of the Middle Tertiary Rubielos de la Cérida Impact Basin in northeastern Spain. Typologically, we organize by: shock melt - accretionary lapilli - diaplectic glass - planar deformation features (PDF) - deformation lamellae in...
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The Dashipo andalusite deposit in Yingjiang County, Yunnan Province is taken as an example in this article to discuss the geological characteristics of andalusite ore occurrence and to analyze the genesis of the deposit. The ore body is mainly found in the middle strata of the Upper segment of the Gaoligongshan Group in the Middle Proterozoic (Pt2g...
Citations
... Considering an ejection hypothesis -asteroids, comets, and meteorites may have formed on larger bodies that may have contained atmosphere and liquids. In this case the presence of carbonates on asteroids and comets (Flynn et al. (2008)) isn't difficult to explain, moreover, carbonates are also found in terrestrial craters (Ernstson and Claudin (2021)), Martian craters, Occator crater on Ceres (Carrozzo et al. (2018)). Furthermore the presence of strata and mesas on comet nuclei (Giacomini et al. (2016)) continues to suggest a large atmospheric "parent" body. ...
We consider an alternative hypothesis of crater formation -- through an electric discharge machining (EDM) of the celestial bodies' surfaces. The source of the energy and the current itself may lie in the plasma infalling on a celestial body (from an extremely strong solar outburst or a nearby supernova). This mechanism may have been even more important than impact cratering in the early Solar System, with potential implications to the history of the dynamics of the System itself and solar activity in particular. In this light, the conclusion that shocked and metamorphosed minerals found within crater sites are evidence of hypervelocity impacts might be reconsidered. There are ambiguities that remain among sources of mineralogical formations. This study is ongoing with details of investigations supporting a new approach to crater formation not yet exhausted. Apart from mineralogical analysis and theoretical considerations regarding the large scale crater formation, we present a description of experimental studies of EDM acting at low pressures. Experimental results are made with crude setups and could easily be replicated on a larger scale with valuable research potential, as there is a well understood relation between the crater size and the energy needed for its production.
