shock metamorphism

shock metamorphism

[′shäk ‚med·ə′mȯr‚fiz·əm]
(petrology)
The complete permanent changes (physical, chemical, mineralogic, morphologic) in rocks caused by transient high-pressure shock waves that act over short-time intervals, ranging from a few microseconds to a fraction of a minute.
References in periodicals archive ?
Among the topics are characteristics of impact craters in the northern hemisphere of Mars, scaling basin-sized impacts and the influence of target temperature, microscopic effects of shock metamorphism in zircons from the Haughton impact structure in Canada, and real-time crater profile analysis: visualizing high-resolution laser altimetry data sets on the graphics processing unit.
Petrographic analysis revealed planar deformation features broadly supportive of shock metamorphism (Spooner et al.
Thin sections were prepared from the samples and examined visually for evidence of shock metamorphism using a Nikon Optiophot-Pol microscope.
Bedrock samples from the vicinity of the North structure contain planar deformation and other petrographic features broadly consistent with those observed in samples from the Bloody Creek structure but not diagnostic of shock metamorphism.
It is a complex crater by type with evidence of shock metamorphism (Dietz 1960; Cohen and others 1961; Carlton and others 1998; Milam and others, 2011) required for impact crater identification (French 1998).
Discovery of microscopic evidence for shock metamorphism at the Serpent Mound structure, south-central Ohio: confirmation of an origin by impact.
Shock metamorphism and shock barometry at a complex impact structure: Slate Islands, Canada.
Shock metamorphism of rock present at the time of impact provides a more definitive means of constraining the age of an impact event.
Only rock present at the time of impact will contain these definitive macro-scale indicators of shock metamorphism.
This mineral fabric is related to shock metamorphism and supports an impact origin for the structure.
Carlton RW, Koeberl C, Baranoski MT, Schumacher GA 1998 Discovery of microscopic evidence for shock metamorphism at the Serpent Mound structure, south central Ohio: confirmation of an origin by impact.