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(Click for frequent words.) 69 sedimentary rocks 67 basalt 67 peridotite 67 sedimentary layers 66 sediments 66 igneous rock 66 metamorphic rock 65 igneous rocks 65 volcanic rock 65 sedimentary 65 limestones 64 sedimentary deposits 64 metamorphic rocks 64 olivine rich 64 continental crust 64 phyllosilicate 64 lavas 63 stromatolites 63 phyllosilicates 62 granitic rocks 62 volcano sedimentary sequence 62 silicates 62 tuffaceous rocks 62 volcanic sediments 62 volcanic tuff 62 basalts 62 anorthosite 62 layered sedimentary rock 62 gabbros 62 calcite 61 clastic 61 cratons 61 Precambrian 61 basaltic 61 goethite 61 dolomites 61 lateritic 61 diabase 61 porous sandstone 61 granitoids 61 cherts 61 tectonically 61 mudstone 61 rock formations 61 marine sediments 61 halite 61 Paleozoic sedimentary 61 silicic 61 limestone bedrock 61 oceanic crust 60 volcanic basalt 60 sediments deposited 60 fine grained sandstone 60 basaltic rocks 60 sandstone 60 geologically 60 loess 60 jarosite 60 volcanic rocks 60 stromatolite 60 claystone 60 Earth crust 60 olivine 60 schists 60 silicate minerals 60 hematite mineral 60 depositional 60 komatiite 60 carbonate minerals 60 komatiitic 60 gneisses 60 gneiss 60 andesitic 60 mineralized mafic 59 mafic rocks 59 siliceous 59 basalt volcanic 59 quartzite 59 dolomitic 59 calcareous 59 lithosphere 59 pyroclastics 59 greywacke 59 hydrated silica 59 Paleozoic 59 geologic formation 59 granite gneiss 59 colluvial 59 hydrated minerals 59 clasts 59 Geologically 59 granites 59 volcaniclastic rocks 59 felsic volcanic 59 amphibolites 59 gabbro 59 silicate mineral 59 seafloor sediments 59 pillow lava 59 Palaeozoic 59 hornfelsed 59 felsic volcanics 59 diorites 59 hornblende 59 earth crust 59 mudstones 59 sedimentary sequence 59 komatiites 59 graben 59 Paleozoic sediments 58 siltstones 58 sandstones 58 siltstone 58 felsic tuff 58 sedimentary sequences 58 metasedimentary 58 magmas 58 alunite 58 peridotites 58 pyroxene 58 volcanism 58 magmatic 58 Archaean 58 volcanoclastic 58 Navajo sandstone 58 metavolcanic 58 Proterozoic sediments 58 layered ultramafic 58 carbonate 58 lunar crust 58 massive sulfide mineralization 58 turbidites 58 concretions 58 impermeable shale 58 felsic rocks 58 Upper Cretaceous 58 mafic intrusion 58 chert 58 gabbroic 58 Palaeozoic sedimentary 58 saprolitic 58 granitic rock 58 zircons 58 limonitic 58 silicate rocks 58 REE enriched 58 amphibolite 58 tuffaceous 58 limestone 58 serpentinized 58 Neoproterozoic 58 ophiolite 57 geological formations 57 biotite rich 57 volcaniclastics 57 carbonaceous 57 ultramafic rocks 57 iron carbonate 57 regolith 57 igneous 57 Arabia Terra 57 Tertiary volcanic 57 Permo Triassic 57 pyroxenite 57 craton 57 geologic 57 ignimbrite 57 unconformity uranium 57 ultramafic rock 57 lava tubes 57 anhydrite 57 banded iron 57 Proterozoic 57 overlying sedimentary 57 greenstones 57 tonalite 57 meta sediments 57 stratiform 57 pegmatitic 57 stratigraphic sequence 57 volcanic tuffs 57 Cambrian Ordovician 57 sulfate minerals 57 andesite flows 57 hornfels 57 mineral hematite 57 haematite 57 carbonate sediments 57 metasediment 57 ophiolitic 57 fine grained sediments 57 paragneiss 57 granodiorite porphyry 57 schist 57 felsic metavolcanic 57 kimberlite breccia 57 dolomite 57 silicified limestone 57 altered andesitic 57 disseminated sulphide mineralization 57 Paleozoic carbonate 57 Alaskite 57 paleochannels 57 quartzites 57 evaporite 57 coarser grained 57 mineral olivine 57 finely disseminated 57 basaltic lava 57 graphitic 56 porphyritic 56 Valles Marineris 56 molten magma 56 hydrothermally altered 56 andesite 56 porous limestone 56 quartz grains 56 dolerite 56 volcanic breccias 56 sediment 56 variably silicified 56 KT boundary 56 pelitic gneiss 56 Precambrian rocks 56 magma ocean 56 aragonite 56 volcanic lava 56 mica schist 56 clastic sediments 56 Outcrops 56 zircon crystals 56 sedimentary basin 56 foraminifera 56 intrusive rocks 56 kaolinite 56 supercontinent 56 mafic 56 Permian Period 56 glacial till 56 mafic flows 56 dacitic 56 phyllite 56 stratigraphy 56 hydrothermally 56 crustal 56 tuffs 56 cretaceous 56 altered granodiorite 56 melt inclusions 56 meta sedimentary rocks 56 xenoliths 56 chlorite altered 56 siderite 56 granitic basement 56 volcanics 56 Elysium Planitia 56 Upper Triassic 56 limestone dolomite 56 terranes 56 glacial outwash 56 ultramafic intrusives 56 tuffaceous sediments 56 Gneiss 56 iron oxides 56 lacustrine 56 sulphide deposits 56 yardangs 56 overlying layers 56 meta sedimentary 56 Sedimentary rocks 56 quartz calcite 56 mafic volcanic rocks 56 ignimbrites 56 metasedimentary rocks 56 schistose 56 greywackes 56 kerogen 56 andesitic volcanic rocks 56 Lower Proterozoic 56 paleochannel 56 felsic tuffs 56 hydrothermal fluid 56 Lower Jurassic 56 mafic intrusive 56 spherules 56 altered ultramafic rocks 56 asthenosphere 56 siliciclastic 56 carbonate rocks 56 extrusive 56 metavolcanics 56 silicified breccia 56 orogenic 56 rhyolite tuffs 56 Late Cretaceous 56 rhyolites 55 shales 55 gneissic 55 magmatism 55 quartz feldspar porphyry intrusive 55 altered felsic 55 vein quartz 55 naturally occurring mineral 55 calcareous sandstone 55 Uranium mineralization 55 Sulphide mineralization 55 silicate mantle 55 pyritized 55 gossanous 55 Early Cretaceous 55 specular hematite 55 chloritic 55 ferric oxides 55 exhalite 55 sericite schists 55 sulfide minerals 55 hydrothermal 55 carbonaceous mudstone 55 granodiorites 55 interbedded 55 fragmental 55 sulfide deposits 55 pyritic 55 rhyolitic 55 Paleoproterozoic 55 alteration halos 55 Middle Devonian 55 plagioclase 55 carbonatites 55 sulphide bearing 55 calcic 55 thermally mature 55 altered mafic 55 primitive meteorites 55 volcaniclastic kimberlite 55 fossils 55 speleothems 55 Athabasca sandstone 55 stony meteorite 55 alluvium 55 variably altered 55 mineralized breccias 55 Ordovician 55 BIFs 55 sedimentary layer 55 brecciated 55 potassic altered 55 rubbly 55 pediment gravels 55 locally graphitic 55 solar nebula 55 sandstone limestone 55 outwash 55 Lower Cretaceous 55 Proterozoic aged 55 Upper Jurassic 55 Tertiary volcanic rocks 55 permeable sandstone 55 Banded Iron Formation 55 hydrothermal activity 55 crackle breccia 55 rhyolite tuff 55 manganese mineralization 55 quartz biotite 55 geologic formations 55 granitic gneiss 55 Cretaceous 55 rhyodacite 55 hematite magnetite 55 Neogene 55 geological strata 55 pyrrhotite chalcopyrite 55 sulphidic 55 mineralized intrusive 55 magnetite skarn 55 post perovskite 55 methane hydrate 55 pyrite altered 55 forams 55 sand silt 55 Cretaceous sediments 55 volcaniclastic 55 mafic volcanic 55 fluid inclusions 55 fossilized coral 55 abyssal plain 55 dacite 55 basaltic magma 55 volcanoclastic rocks 55 geochronology 55 placer deposits 54 stockwork veining 54 serpentinite 54 chondrules 54 altered ultramafic 54 pelitic 54 basalt flows 54 Cretaceous sandstones 54 arenite 54 Proterozoic basement 54 magmatic sulphide 54 metasediments 54 eluvial 54 hematitic 54 feldspar 54 quartz adularia 54 REE bearing 54 ejecta 54 volcanogenic 54 Jurassic limestone 54 mafic metavolcanics 54 sediments intruded 54 carbonate altered 54 stalactite 54 volcanic 54 volcanic arcs 54 magma 54 Garee Lens 54 pelite 54 Laurentide ice sheet 54 metavolcanic rocks 54 facies 54 pyrite halo 54 basaltic rock 54 Carboniferous 54 calcareous sediments 54 gneissic rocks 54 calcareous rocks 54 subvolcanic 54 chalcedonic silica 54 crustal rocks 54 andesitic rocks 54 carbonaceous material 54 magnetite bearing 54 colluvium 54 Petrified wood 54 diatremes 54 evaporite minerals 54 calderas 54 calc alkaline 54 argillaceous 54 Birimian metasediments 54 Pre Cambrian 54 erosional 54 silty limestone 54 granitoid 54 basalt rock 54 stockwork veins 54 argillites 54 argillite 54 grabens 54 glacial moraine 54 felsic dikes 54 vuggy silica 54 tufa 54 rhyolite 54 sandstone formations 54 overlying sandstone 54 Navajo Sandstone 54 ultramafics 54 interlayered 54 quartz feldspar 54 anticlines 54 skarn alteration 54 disseminated sulfide 54 molten rock 54 stratabound 54 overlies 54 surficial 54 ejecta blanket 54 quartz feldspar porphyry 54 ancient supercontinent 54 yedoma 54 advanced argillic alteration 54 Late Jurassic 54 Wollaston Domain 54 quartz feldspar porphyries 54 outcrop 54 icy crust 54 Paleozoic sedimentary rocks 54 pegmatite dyke 54 argillic altered 54 biotite schist 54 silicate dust 54 volcano sedimentary 54 seafloor sediment 54 chrysocolla 54 clathrates 54 mylonite 54 Karoo sediments 54 Proterozoic age 54 phreatic 54 meteorite fragments 54 carbonaceous chondrite 54 peridotitic 54 metal zonation 54 detrital 54 hematite 54 amorphous silica 54 breccia pipes 53 geochemical signature 53 Felsic 53 lithologies 53 zinc sulfide 53 Middle Jurassic 53 Molybdenite 53 metasomatic 53 microfossil 53 calc silicate 53 disseminated pyrrhotite 53 mineralized quartz 53 lunar meteorites 53 terrane 53 unweathered 53 mafic volcanics 53 manganese oxides 53 feldspathic 53 saline aquifers 53 siliceous sediments 53 depositional environment 53 andesitic volcanics 53 carbonatized 53 olivine crystals 53 cinder cones 53 magnetite crystals 53 hydrothermal fluids 53 granitic intrusive 53 epithermal deposit 53 volcanic stratigraphy 53 silcrete 53 brecciated silicified 53 silica carbonate 53 mineral apatite 53 overlie 53 gabbroic rocks 53 monazite 53 brecciated quartz 53 tremolite 53 Carbonatite Complex 53 diatreme breccias 53 diorite porphyry 53 sericitized 53 intrusives 53 pyrite marcasite 53 Carbonate 53 chalcopyrite mineralization 53 potassically altered 53 deformational 53 Burgess Shale 53 alaskite 53 quartz sericite alteration 53 IOCG mineralization 53 variably mineralized 53 sedex 53 Kambalda style 53 eclogite 53 intermediate volcanics 53 pillow basalts 53 sericitic 53 disseminated magnetite 53 quartz veined 53 eudialyte 53 undersea volcanoes 53 hematite stained 53 pyrrhotite pyrite 53 Meridiani 53 pyritic quartz 53 pelites 53 pyrophyllite 53 volcanic massive sulphide 53 Paleozoic rocks 53 Caracol Formation 53 Chert 53 volcanic sedimentary 53 iron sulfide 53 alkalic 53 volcanic caldera 53 brecciated limestone 53 Twangiza Main 53 allanite 53 Dry Valleys 53 silica 53 Jurassic sandstone 53 granitic 53 calcite crystals 53 methane hydrates 53 uraniferous 53 lunar soil 53 quartz veinlets 53 quartz monzonite 53 solidified lava 53 stockworked 53 pyroxenites 53 Dumico 53 calcrete 53 Mesozoic 53 potassium feldspar 53 mafic intrusives 53 flood basalts 53 quartz tourmaline breccia 53 lava flows 53 stony meteorites 53 carbonatite 53 smectite 53 carbonate formations 53 molten rocks 53 lamproite 53 geochemically 53 sedimentary basins 53 chalcopyrite pyrite 53 sericitization 53 isotopic compositions 53 ancient lava flows 53 gabbroic intrusion 53 seabed sediments 53 illite 53 outcrops 53 Mancos shale 53 lunar magma 53 porphyry intrusives 53 secondary chalcocite 53 basalt rocks 53 windblown sand 52 argillically altered 52 breccia 52 overthrust 52 macrocrystic 52 alluvial deposits 52 Laurentide Ice Sheet 52 orogenic gold 52 syenite gneiss 52 clastics 52 vuggy 52 supergene copper 52 vuggy quartz 52 lithological 52 sericite altered 52 Chicxulub crater 52 plate tectonics 52 stibnite 52 felsic volcanic rocks 52 glaciation 52 Ontario Lacus 52 siliceous breccia 52 apatite 52 calcium carbonate 52 silica breccia 52 carbonaceous chondrites 52 dolostone 52 strongly foliated 52 feldspar porphyry 52 Syrtis Major 52 arsenopyrite bearing 52 supergene enriched 52 Eocene 52 andesitic volcanic 52 chlorite sericite 52 altered volcanics 52 dunite 52 gray hematite 52 sulfidic 52 abyssal plains 52 Bedout 52 sulfide bearing 52 conglomeratic 52 felsic 52 quartz pebble conglomerate 52 sulfate salts 52 felsic dyke 52 copper sulphides 52 uraninite 52 hematite goethite 52 subglacial lake 52 anomalously radioactive 52 feldspar porphyry intrusive 52 hematized 52 carbonate veins 52 metasedimentary sequence 52 felsic intrusions 52 rhyolite porphyry 52 Archean aged 52 quartz monzonite porphyry 52 Cretaceous limestone 52 Martian meteorites 52 dacite porphyry 52 gabbro intrusive 52 quartz vein stockwork 52 subduction 52 karst topography 52 peridotite sill 52 Late Paleozoic 52 mineralized skarn 52 pyrite alteration 52 biotite 52 vanadium mineralization 52 albitite 52 carbonates 52 stalagmite 52 quartz alunite 52 gypsum crystals 52 quartz pyrite veins 52 carbonate replacement 52 Kermadec Arc 52 unconformably overlain 52 felsic metavolcanics 52 pegmatite dykes 52 mafic ultramafic rocks 52 aluminous 52 shear veins 52 intensely silicified 52 pyroclastic 52 hydrothermal alteration 52 andesites 52 microfossils 52 Archean basement rocks 52 pentlandite 52 shallowly dipping 52 Cenozoic Era 52 chondritic meteorites 52 tonalitic 52 Jupiter moon Io 52 tholins 52 evaporite deposits 52 pelitic gneisses 52 carnotite 52 alteration halo 52 CAIs 52 Chalcopyrite 52 mafic intrusions 52 volcanic magma 52 surface hoar 52 hydrocarbon accumulations 52 supergene 52 Lengai 52 vugs 52 Jurassic Cretaceous 52 Archean 52 quartz sulphide vein 52 GJ#b 52 anomalous concentrations 52 biotite alteration 52 milky quartz 52 iron oxide 52 amphibolite facies 52 altered porphyry 52 Chromitite 52 fossilized shells 52 quartz sulphide veins 52 igneous intrusion 52 recrystallized 52 cherty 52 quartz chlorite 52 quartz stockworks 52 petrified wood 52 overlying sediments 52 amphibole 52 Tertiary volcanics 52 caldera 52 earths crust 52 crystal tuff 52 quartz sericite pyrite alteration 52 paleo placer 52 chromitite 52 bryozoans 52 finely disseminated pyrite 52 chalcocite 52 K feldspar 52 mineralized diorite 52 Arsenopyrite 52 alluvial plain 52 breccia mineralization 52 biotite magnetite 52 Cryogenian 52 copper nickel sulphide 52 shell midden 52 volcano sedimentary rocks 52 iron sulphides 52 silicified meta 52 tholeiitic 52 advanced argillic 52 quartz alunite alteration 52 greenschist facies 52 sedimentary strata 52 potassic 52 diatoms 51 altered diorite 51 ultramafic 51 subglacial 51 Paleocene 51 plutons 51 gabbro dykes 51 platinum palladium mineralization 51 variably siliceous fine grained 51 intrusive granitic 51 rhyolite domes 51 carboniferous 51 dacites 51 wrinkle ridges 51 subhorizontal 51 silica pyrite 51 epidote 51 mafic metavolcanic rocks 51 altered felsic volcanic rocks 51 greenschist 51 quartz sericite 51 turbidite 51 magnetite BIF 51 hydrothermal venting 51 pyrite arsenopyrite 51 brittle deformation 51 disseminated chalcopyrite 51 felsic intrusive 51 metalliferous 51 rocks 51 epithermal gold mineralization 51 atomically flat 51 chlorite alteration 51 malachite mineralization 51 wallrock 51 epithermal quartz 51 geothermal gradient 51 glacial overburden 51 granite porphyry 51 stratigraphically 51 quartz diorite 51 Igneous Complex 51 alteration assemblages 51 volcanic breccia 51 unmineralized 51 porphyry dikes 51 subaqueous 51 mud volcanoes 51 Yellowstone caldera 51 sericite schist 51 propylitic 51 acid leached 51 silty clay 51 gossans 51 magnesium silicate 51 massive sulphide deposit 51 massive sulphide deposits 51 disseminated sulphides 51 circular depressions 51 stockwork zones 51 fine grained sedimentary rock 51 Lemarchant prospect 51 eskers 51 pore spaces 51 sedimentary formations 51 ferruginous 51 brecciated zones 51 fluorapatite 51 Tharsis Rise 51 lake sediments 51 cobalt mineralization 51 chloritized 51 PGM mineralization 51 Permian extinction 51 Plio Pleistocene 51 hematite alteration 51 Ni Cu PGE mineralization 51 wallrocks 51 polymictic conglomerate 51 prospective stratigraphy 51 nepheline syenite 51 foreland 51 clastic rocks 51 skarn mineralization 51 peralkaline 51 subducted 51 formation BIF 51 gabbro sill 51 Moho 51 breccia zones 51 corundum 51 Ordovician limestone 51 Mesoproterozoic 51 landforms 51 crinoids 51 basinal 51 WNW trending 51 hydrothermal breccia 51 sylvite 51 Fe Mn 51 Tharsis 51 Troodos Ophiolite Complex 51 leached capping 51 Peridotite 51 Au Cu mineralization 51 pyrite galena 51 sulphide veins 51 lava 51 McMurdo Dry Valleys 51 trilobites 51 ultramafic intrusions 51 felsic intrusive rocks 51 altered andesite 51 metamorphism 51 greisen 51 nickel sulphides 51 Sudbury Igneous Complex 51 manto mineralization 51 Anomalous radioactivity 51 jasperoid 51 Paleogene 51 Hesperian epoch 51 itabirite 51 magma chamber 51 pyrrhotite mineralization 51 radiocarbon dated 51 albite alteration 51 sulphide mineral 51 domal 51 massive galena 51 eolian 51 isotopic ratios 51 lapilli tuff 51 garnet skarn 51 microbialites 51 quartz carbonate veins 51 silicified zones 51 heterolithic 51 pyrite mineralization 51 silica alteration 51 Cambrian Period 51 Nordegg Member 51 extinct volcanoes 51 sylvinite 51 karstic 51 volcano sedimentary sequences 51 decaying vegetation 51 stratovolcano 51 strongly altered felsic 51 southern supercontinent 51 amphibolite grade 51 meteor fragment 51 magnetite hematite 51 silicified andesite 51 oceanic plates 51 mineral spodumene 51 ultramafic hosted 51 scoria 51 ultramafic sill 51 carbonatite dykes 51 Amundsen Sea 51 palaeo 51 coprolite 51 carbon isotopes 51 granitoid rocks 51 karst terrain 51 geological stratum 51 Archaean greenstone 51 manganese oxide 51 drumlins 51 granodiorite intrusive 51 sulfide veins 51 quartz carbonate vein 51 medium grained 50 silicified zone 50 mineral assemblages 50 plutonic rocks 50 bedrock outcrops 50 impermeable layer 50 basalt lava 50 Iapetus 50 crossbedding 50 quartz magnetite 50 Arctic permafrost 50 gabbroic intrusive 50 altered silicified 50 calcareous siltstones 50 pitchblende 50 mafic intrusive rocks 50 vuggy silica breccias 50 granodiorite 50 felsic intrusives 50 graphitic conductors 50 volcanic vents 50 galena sphalerite 50 magma cools 50 Siberian Traps 50 sericitic alteration 50 outcropping mineralized 50 martian rocks 50 subduction zones 50 Prairie Evaporite Formation 50 geologically active 50 oceanic lithosphere 50 mafic ultramafic 50 banded quartz 50 Chromite 50 diatreme 50 specularite 50 shallowly buried 50 permafrost 50 Lake Vostok 50 sericite chlorite 50 muscovite 50 stockwork breccia