Containing a flintlike rock
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CHERTYContaining a flintlike rock
gannistera flintlike rock used for lining Bessemer converters and for surfacing roads also GANISTER
gannistersGANNISTER, a flintlike rock used for lining Bessemer converters and for surfacing roads also GANISTER
ciminitea rock containing olivine
ciminitesCIMINITE, a rock containing olivine
orerock containing a valuable metal, also OWRE
owrerock containing a valuable metal, also ORE
greenstonesA greenish igneous rock containing feldspar and hornblende
halleflinta(Swedish) a dense rock containing quartz and feldspar
owresOWRE, rock containing a valuable metal, also ORE
oresORE, rock containing a valuable metal, also OWRE
greenstoneA greenish igneous rock containing feldspar and hornblende
ironstonesSedimentary rock containing a substantial proportion of iron compounds
migmatitea type of rock containing igneous and metamorphic elements
halleflintasHALLEFLINTA, (Swedish) a dense rock containing quartz and feldspar
daciteA volcanic rock resembling andesite but containing free quartz
dacitesA volcanic rock resembling andesite but containing free quartz
phosphoriteA sedimentary rock containing a high proportion of calcium phosphate
phosphoritesA sedimentary rock containing a high proportion of calcium phosphate
migmatitesMIGMATITE, a type of rock containing igneous and metamorphic elements
decalcified(of rock or bone) Containing a reduced quantity of calcium salts
nepheliniteA fine-grained basaltic rock containing nepheline in place of plagioclase feldspar
ferromagnesian(of a rock or mineral) Containing iron and magnesium as major components
feldspathic(of a mineral or rock) Of the nature of or containing feldspar
alkalic(of igneous rock) containing a relatively high percentage of sodium and potassium alkali
wackespoorly sorted sandstone containing fragments of rock and minerals in a clayey matrix
wackepoorly sorted sandstone containing fragments of rock and minerals in a clayey matrix
phonoliticof or like phonolite, a compact, feldspathic, igneous rock containing nephelite, hauynite, etc
abrirock shelter formed by the overhang of a cliff and often containing prehistoric occupation deposits
abrisrock shelter formed by the overhang of a cliff and often containing prehistoric occupation deposits
granodioriteA coarse-grained, plutonic rock containing quartz and plagioclase, between granite and diorite in composition
porphyryA hard igneous rock containing crystals, usually of feldspar, in a fine-grained, typically reddish groundmass
porphyriesA hard igneous rock containing crystals, usually of feldspar, in a fine-grained, typically reddish groundmass
variolitea kind of diorite or diabase containing imbedded whitish spherules, which give the rock a spotted appearance
variolitesVARIOLITE, a kind of diorite or diabase containing imbedded whitish spherules, which give the rock a spotted appearance
kimberliteA rare, blue-tinged, coarse-grained intrusive igneous rock sometimes containing diamonds, found esp. in South Africa and Siberia
monzonitesA granular igneous rock with a composition intermediate between syenite and diorite, containing approximately equal amounts of orthoclase and plagioclase
eclogiterock consisting of a granular aggregate of green pyroxene and red garnet, often containing kyanite, silvery mica, quartz, and pyrite
monzoniteA granular igneous rock with a composition intermediate between syenite and diorite, containing approximately equal amounts of orthoclase and plagioclase
graywackeany coarse-grained, usually dark sandstone containing angular mineral and rock fragments in a fine-grained clayey matrix also GREYWACKE, WACKE