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A basic or basalt glass
Answer for the clue "A basic or basalt glass ", 9 letters:
tachylite
Word definitions for tachylite in dictionaries
WordNet
Word definitions in WordNet
n. a basic or basalt glass
Wiktionary
Word definitions in Wiktionary
n. (alternative form of tachylyte English)
Wikipedia
Word definitions in Wikipedia
Tachylite (also spelled tachylyte) is a vitreous form of basaltic volcanic glass . This "glass" is formed naturally by the rapid cooling of molten basalt. It is a basic type of igneous rock that is decomposable by acids and readily fusible. The color is ...