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A hard coarse-grained siliceous sandstone
Answer for the clue "A hard coarse-grained siliceous sandstone ", 8 letters:
gritrock
Word definitions for gritrock in dictionaries
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Grit \Grit\, n. [OE, greet, greot, sand, gravel, AS. gre['o]t grit, sant, dust; akin to OS griott, OFries. gret gravel, OHG. grioz, G. griess, Icel. grj[=o]t, and to E. groats, grout. See Groats , Grout , and cf. Grail gravel.] Sand or gravel; rough, ...
Wiktionary
Word definitions in Wiktionary
n. gritstone
WordNet
Word definitions in WordNet
n. a hard coarse-grained siliceous sandstone [syn: grit , gritstone ]