impactite


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impactite

(ɪmˈpæktaɪt)
n
a glassy rock formed by a meteor collision
References in periodicals archive ?
Lounejeva, "Raman spectroscopy of natural silica in Chicxulub impactite, Mexico," Comptes Rendus Geoscience, vol.
Scientists now think that tektites are a type of impactite, formed during the rapid heating and cooling of material ejected when a meteorite strikes Earth.
In addition to bone and shell, nine different stone materials were used in experiments (silcrete, impactite, sandstone, chert, quartzite, quartz, hornfels, obsidian and flint).
In 1980 Elsebeth Thomsen proposed that the Black Stone is an impactite (fused sand mixed with meteoritic material) from the Wabar Craters in Saudi Arabia's Empty Quarter (S&T: November 1997, page 44).
The crater walls are lined with breccia, fragments of shock-compressed sand that had been metamorphosed into a firm aggregate we called "instant rock." The exposed rims of the two largest craters are mantled with fragments of black, slaggy glass called impactite (consisting of about 10 percent iron-nickel from the shock-melted meteorite and 90 percent local sand) and chunks of instant rock that look like bleached sandstone.