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20 answers for: Ultra fine-grained igneous rock
RANKANSWERCLUE
APHANITEUltra fine-grained igneous rock
ANDESITEDark fine-grained igneous rock found in volcanic areas (8)
APHANITESFine-grained igneous rocks
GOSSAMERUltra-fine, like a spider's web
FIBREOPTICSUse of ultra-fine glass rods to transmit light signals (5,6)
GRANITECoarse-grained igneous rock (7)
DIORITECoarse-grained igneous rock
TROCTOLITEA coarse-grained igneous rock also called troutstone (10)
NORITECoarse-grained igneous rock
DIABASEDark, medium-grained igneous rock (7)
DOLERITEDark, medium-grained igneous rock (8)
GABBROCoarse-grained igneous rock
BASALTFine-grained dark basic igneous rock (6)
PORPHRRYIgneous rock containing feldspar crystals in a fine-grained
FELSITEFine-grained rock
MYLONITETiny arachnid only developing inside fine-grained rock
SHALEA dark, fine-grained sedimentary rock (5)
MARLFine-grained sedimentary rock (4)
SLATECriticise - fine-grained grey rock (5)
RHYOLITEPale fine-grained volcanic rock, aka liparite (8)