impactite


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impactite

[′im‚pak‚tīt]
(geology)
Glassy fused rock or meteor fragments resulting from heat of impact of a meteor on the earth.
References in periodicals archive ?
Strange glassy objects--called "tektites" and "impactites"--are found by the thousands in sites scattered across the earth.
The fact that the craters have survived the shifting sands of the Rub' al-Khali is due solely to impactite glass and instant rock that mantle the crater rims and walls and resist scouring by the wind.
Studies of impactite samples in the 1960s gives an age of about 6,400 years for the craters, but we think that this is probably an order of magnitude too high.
Connues sous le nom de tectites ou impactites il s'agit de billes de sables de quartz et de yerres de silice accompagnant les crateres d'impact par des formations coniques extemes (shatter-cones) recouvertes de stries rayonnantes.