Obsidian is a rock with glass-like characteristics. Obsidian is formed by rapid what and why? (a) weathering (b) erosion (c) cementation (d) cooling

asked Jul 11, 2019 41.6k views

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Obsidian is a rock with glass-like characteristics. Obsidian is formed by rapid what and why?

(a) weathering
(b) erosion
(c) cementation
(d) cooling

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3 votes

(d) cooling
if obsidian is glasss like it is very logical that a cooling process is needed! If I was u I'd go cooling, d
:)

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