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20 answers for: A principal constituent of igneous rocks (8)
RANKANSWERCLUE
FELDSPARA principal constituent of igneous rocks (8)
GRANITICRefashioned cigar tin of igneous rock (8)
PLUTONICAround Beds town, image of igneous rock (8)
PYROXENEAny of a group of silicate minerals common in igneous rocks (8)
LAVASource of igneous rocks
SALICOf igneous rocks
DOLERITESTypes of igneous rocks
SILICAPrincipal constituent of sandstone and other rocks
GRANITESIgneous rocks
BASISThe principal constituent of groundwork
BASALTForming the coastal columns of the Giant's Causeway in Northern Ireland, a type of igneous rock that was used to make neolithic ground stone tools (6)
SILLIn geology, a tabular sheet intrusion of igneous rock between older layers of sedimentary rock (4)
GRANITEAberdeen in Scotland is called the city of this type of igneous rock
SILLSLedges at the bases of windows; or, layers of igneous rock (5)
PLUTONMass of igneous rock under the Earth's surface
MAGMASource of igneous rock
MAGMASSources of igneous rock
TORThe most famous examples of this type of igneous outcrop are found in the moorlands of Dartmoor
OLIVINEA clear or grey-green mineral found in igneous rocks (7)
DIAMONDAn exceptionally hard mineral found in certain igneous rocks, especially the kimberlites of South Africa