منابع مشابه
Shatter cones: (Mis)understood?
Meteorite impact craters are one of the most common geological features in the solar system. An impact event is a near-instantaneous process that releases a huge amount of energy over a very small region on a planetary surface. This results in characteristic changes in the target rocks, from vaporization and melting to solid-state effects, such as fracturing and shock metamorphism. Shatter cone...
متن کاملNumerical Modeling of Shatter Cones Development in Impact Craters
Introduction: Shatter cones are the characteristic forms of rock fractures in impact structures. They have been used for decades as unequivocal fingerprints of meteoritic impacts on Earth [1,2]. The abundant data about shapes, apical angles, sizes and distributions of shatter cones for many terrestrial impact structures should provide insights for the determination of impact conditions and char...
متن کاملShatter-proofing Windows
The Shatter attack uses the Windows API to subvert processes running with greater privilege than the attack code. The author of the Shatter code has made strong claims about the difficulty of fixing the underlying problem, while Microsoft has, with one exception, claimed that the attack isn’t a problem at all. Whether or not Shatter is indeed an exploit worth worrying about, it uses a feature o...
متن کاملA New Model for the Formation of Shatter Cones : Consequences for the Interpretation of Shatter Cone Data in Terrestrial Impact Structures
In this paper we present a new model for the formation of shatter cones. The model follows earlier suggestions that shatter cones are initiated by heterogeneities in the rock, but does not require the participation of an elastic precursor wave: the conical fractures are initiated after the passage of the main plastic compression pulse, not before. Numerical simulations using the hydrocode SALE ...
متن کاملSilicified Cone-in-Cone Structures from Erfoud (Morocco): A Comparison with Impact-Generated Shatter Cones
Several geological features, including sedimentary cone-in-cone structures and percussion marks, may resemble impact-generated shatter cones. Especially inexperienced workers may mistake such features for impact deformation. In 1997, our group investigated an alleged occurrence of shatter cones in the Hamada area of southeastern Morocco and found that these are actually cone-in-cone structures,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science Advances
سال: 2016
ISSN: 2375-2548
DOI: 10.1126/sciadv.1600616