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.
Thin sections were prepared from the samples and examined visually for evidence of shock metamorphism using a Nikon Optiophot-Pol microscope.
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.
In French BM and Short NM editors, Shock Metamorphism of Natural Materials, Mono Book Corp., Baltimore, MD: 291-322.
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. Shatter cones were first discovered by Dietz (1960) in residual boulders in the central peak of the Serpent Mound crater.
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.