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Kamil Crater (Egypt); ground truth for small-scale meteorite impacts on Earth

L. Folco, M. Di Martino, A. El Barkooky, M. D'Orazio, A. Lethy, S. Urbini, I. Nicolosi, M. Hafez, C. Cordier, M. van Ginneken, A. Zeoli, A. M. Radwan, S. El Khrepy, M. El Gabry, M. Gomaa, A. A. Barakat, R. Serra and M. El Sharkawi
Kamil Crater (Egypt); ground truth for small-scale meteorite impacts on Earth
Geology (Boulder) (February 2011) 39 (2): 179-182

Abstract

Small impact craters (<300 m in diameter) are rare on Earth and mostly deeply eroded, so that knowledge of their formation mechanism and the hazard small impactors constitute to human populations is largely based on physical models. We report on the geophysical investigation of the Kamil Crater we recently discovered in southern Egypt. The Kamil Crater is a <5 k.y. old impact crater 45 m in diameter, with a pristine ejecta ray structure. Such well-preserved structures have been previously observed only on extraterrestrial rocky or icy planetary bodies. This crater feature, and the association with an iron meteorite impactor and shock metamorphism, provides a unique impression of aspects of small-scale hypervelocity impacts on the Earth's crust. Contrary to current models, ground data indicate that iron meteorites with masses of tens of tons may be able to penetrate the atmosphere without substantial fragmentation.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 39
Serial Issue: 2
Title: Kamil Crater (Egypt); ground truth for small-scale meteorite impacts on Earth
Affiliation: Universita di Siena, Museo Nazionale dell'Antartide, Siena, Italy
Pages: 179-182
Published: 201102
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 17
Accession Number: 2011-019909
Categories: Petrology of meteorites and tektites
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2011074
Illustration Description: illus. incl. sketch map
N22°01'06" - N22°01'06", E26°05'15" - E26°05'15"
Secondary Affiliation: Osservatorio Astronomico di Torino, ITA, ItalyCairo University, EGY, EgyptUniversita di Pisa, ITA, ItalyNational Research Institute of Astronomy and Geophysics, EGY, EgyptIstituto Nazionale di Geofisica e Vulcanologia, ITA, ItalyEgyptian Mineral Resources Authority, EGY, EgyptUniversita di Bologna, ITA, Italy
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201112
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