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Lunar deposits of possible pyroclastic origin (1974)

Mckay, D. S. ; Heiken, G. H. ; Brown, R. W.

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Publication Date: 2011-08-16

Description: Orange glass droplets sampled from the Apollo 17 site were found to be both chemically and texturally homogeneous. None of these droplets, which are of possible pyroclastic origin, contained shock-damaged crystals which are common in glass produced by meteorite impacts. Black droplets are apparently the partially crystallized equivalents of the orange glass. Since chemically and texturally homogeneous glass droplets are known to form in terrestrial lava fountains of basaltic melt, the orange glasses from Apollo 11 and 17 sites and the green glasses from the Apollo 15 site may have formed in lava fountains of low-viscosity lunar basaltic magmas.

Keywords: LUNAR AND PLANETARY EXPLORATION

Type: Geochimica et Cosmochimica Acta; 38; Nov. 197

Format: text

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