Craters from Impacts and Explosions
نویسندگان
چکیده
منابع مشابه
Terrestrial Volcanic and Impact Analogs to Small Martian Craters: Utilizing Remote Sensing and Field-based Datasets to Analyze Formational and Sediment Transport Processes
Introduction: Two terrestrial craters of different origins have been selected as field sites for this continuing work: El Elegante Crater, a maar crater in the Pinacate Volcanic Field (PVF) in northern Mexico, formed approximately 150,000 years ago from phrea-tomagmatic explosions [1-2], and Meteor Crater, an impact crater located in central Arizona, formed approximately 50,000 years ago from t...
متن کاملImpacts into non-polar ice-rich paleodeposits on Mars: Excess ejecta craters, perched craters and pedestal craters as clues to Amazonian climate history
We compare three previously independently studied crater morphologies – excess ejecta craters, perched craters, and pedestal craters – each of which has been proposed to form from impacts into an ice-rich surface layer. Our analysis identifies the specific similarities and differences between the crater types; the commonalities provide significant evidence for a genetic relationship among the m...
متن کاملASYMMETRIC STRUCTURE OF LUNAR IMPACT CRATERS DUE TO OBLIQUE IMPACTS? M.Goeritz
Introduction: It has long been a matter of debate whether there exist any characteristic features in crater morphology diagnostic for oblique impacts [e.g. 1,2]. The vast majority of impact craters are almost circular in plain view, although it is well known that most impacts occur at an oblique angle of incidence [3]. Impact events may be approximated as a stationary point source of energy and...
متن کاملStatistical Characterization of Spatial Distribution of Impact Craters: Implications to Present-day Cratering Rate on Mars
Introduction: Counting craters has long been widely used in planetary science to get information about age of materials and events in geological history of planetary bodies. It also has long been understood that the uniform surface age and accumulation crater population requires "random" spatial distribution of craters. Such tests for randomness were applied to martian craters, e.g., in [1]. He...
متن کاملComputer modeling and electron microscopy of silicon surfaces irradiated by cluster ion impacts
A hybrid molecular dynamics model has been applied for modeling impacts of Ar and decaborane clusters, with energies ranging from 25 to 1500 eV/atom, impacting Si surfaces. Crater formation, sputtering, and the shapes of craters and rims were studied. Our simulation predicts that on a Si(1 0 0), craters are nearly triangular in cross-section, with the facets directed along the close-packed (1 1...
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