Estructura d'impacte: diferència entre les revisions

{{inacabat|jaumellecha}}

The term '''impact structure''' is closely related to the terms ''[[impact crater]]'' and ''meteorite impact crater'', and is used in cases in which erosion or burial has destroyed or masked the original topographic feature with which one normally associates the term ''crater''. This is the fate of almost all old impact craters on [[Earth]], unlike the ancient pristine craters preserved on the [[Moon]] and other geologically inactive rocky bodies with old surfaces<ref>{{cite book |last1=Moore |first1=Jeffrey M. |last2=Black |first2=Greg |last3=Buratti |first3=Bonnie |last4=Phillips |first4=Cynthia B. |last5=Spencer |first5=John |last6=Sullivan |first6=Robert |editor1-first=Robert T. |editor1-last=Pappalardo |editor1-link= |others=McKinnon, William B.; Khurana, Krishan |title=Europa |url=https://books.google.com/books?id=Jpcz2UoXejgC&pg=PA341&dq=%22Bodies+with+current+geological+activity+such+as+Io+and+Earth%22&hl=de&sa=X&ei=8LYRT7S8LsPh4QTE0c3RAw&ved=0CEEQuwUwAA#v=onepage&q=%22Bodies%20with%20current%20geological%20activity%20such%20as%20Io%20and%20Earth%22&f=false |series=The University of Arizona space science series |year=2009 |publisher=[[University of Arizona Press|The University of Arizona Press]] |location=Tucson |isbn=978-0-8165-2844-8 |page=341 |chapter=Surface Properties, Regolith, and Landscape Degradation |chapterurl=https://books.google.com/books?id=Jpcz2UoXejgC&pg=PA329&dq=%22Surface+Properties,+Regolith,+and+Landscape+Degradation%22&hl=de&sa=X&ei=4LART7b8H4PR4QSrjsnAAw&sqi=2&ved=0CDQQuwUwAA#v=onepage&q=%22Surface%20Properties%2C%20Regolith%2C%20and%20Landscape%20Degradation%22&f=false |quote=Bodies with current geological activity such as [[Io (moon)|Io]] and Earth have very few recognizable impact craters—Io, in fact, is so volcanically active that not a single impact crater, of any size, has been found on its surface to date. The Earth has about 150 recognized craters, but many have been geologically modified and would be difficult to recognize from orbit. On the other hand, geologically inactive bodies with old surfaces, such as Earth's [[Moon]] or [[Callisto (moon)|Callisto]], are covered with impact craters of all sizes.}}</ref> in the [[Solar System]]. Impact structure is synonymous with the less commonly used term ''astrobleme'' meaning "star wound".<ref>{{cite book

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