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(Click for frequent words.) 74 zircon crystals 66 olivine 65 lavas 65 phyllosilicates 63 microfossils 63 stromatolites 63 isotopic composition 63 isotope ratios 63 isotopic 63 Martian meteorites 62 CAIs 62 igneous rocks 62 isotopic compositions 62 lunar crust 62 chondrites 61 speleothems 61 hydrated minerals 61 sedimentary layers 61 marine sediments 61 chondrules 61 sulfur isotope 61 concretions 61 martian meteorites 61 ALH# 60 zircon grains 60 phyllosilicate 60 isotope composition 60 igneous 60 cratons 60 continental crust 60 stromatolite 60 oxygen isotope 60 olivines 60 spherules 60 metamorphic rocks 60 isotopic ratios 60 lunar meteorites 60 primitive meteorites 59 Neoproterozoic 59 sedimentary deposits 59 meteorite fragments 59 peridotitic 59 oxygen isotopes 59 silicate minerals 59 sulfur isotopes 59 olivine crystals 59 Murchison meteorite 59 komatiites 59 basaltic rocks 58 igneous rock 58 quartz grains 58 plagioclase 58 stony meteorites 58 fluid inclusions 58 jarosite 58 carbonaceous chondrites 58 lake sediments 58 basalts 58 calcite 58 magmas 58 sedimentary rock 58 basaltic 58 ferric oxides 57 carbonate globules 57 anorthosite 57 post perovskite 57 sedimentary rocks 57 Neogene 57 spinels 57 forams 57 Martian meteorite 57 apatite 57 spinel 57 chondritic meteorites 57 magnetite crystals 57 radiocarbon dates 57 osmium 57 zircon 57 hydrated silica 57 solar nebula 57 geochronology 56 fossils 56 olivine rich 56 corundum 56 magma ocean 56 Precambrian 56 chrome diopsides 56 iron oxides 56 Archaean 56 carbon isotopes 56 eudialyte 56 Fe Mn 56 chondritic 56 pyrope garnets 56 foraminifera 56 carbonatites 56 presolar grains 56 Mojzsis 56 aragonite 56 feldspar 56 comet nuclei 56 radiocarbon dated 56 uranium thorium 56 radiocarbon 56 craton 56 mantle xenoliths 56 loess 55 oxygen isotope ratios 55 turbidites 55 radiometric dating 55 carbonate minerals 55 eclogite 55 mineral hematite 55 isotope fractionation 55 goethite 55 ilmenites 55 microcrystals 55 mineralogy 55 pyroxene 55 crystallites 55 brachiopods 55 paleomagnetic 55 volcanic basalt 55 silicates 55 eclogitic 55 isotopic fractionation 55 geochemists 55 elemental composition 55 seafloor sediments 55 graphite whiskers 55 Wassonite 55 meteorites 55 KIMs 55 sediments 55 BIFs 55 pyrites 55 gabbros 55 carbon spherules 55 Sedimentary rocks 55 pyrope 55 hematite 55 carbon isotope ratios 54 Ohmoto 54 melt inclusions 54 carbonaceous material 54 Noachian 54 pyrope garnet 54 sterile neutrino 54 sediments deposited 54 presolar 54 sulphidic 54 conodonts 54 abundances 54 protoplanetary disk 54 mantle plumes 54 halite 54 monazite 54 Hadean 54 peridotites 54 KT boundary 54 silicate rocks 54 silicate mineral 54 REE bearing 54 silicate dust 54 hydrothermally 54 oceanic crust 54 layered ultramafic 54 protoplanet 54 haematite 54 crustal rocks 54 volcanic rocks 53 hornblende 53 sulfide minerals 53 magmatic rocks 53 metamorphic rock 53 chromites 53 nebular 53 granite gneiss 53 mudstone 53 microdiamonds 53 Gneiss 53 lunar soil 53 carbonaceous chondrite 53 silicate mantle 53 kimberlite breccia 53 xenoliths 53 tonalite 53 Early Cretaceous 53 chert 53 vugs 53 Carboniferous 53 biotite rich 53 KBOs 53 coarser grained 53 potassium feldspar 53 detrital 53 tungsten isotopes 53 coprolites 53 Mg Fe 53 glaciations 53 potassium thorium 53 geochemically 53 calcareous 53 petrographic 53 silicate crystals 53 perovskite 53 eluvial material 53 quartz crystals 53 depositional 53 element osmium 53 strontium isotope 53 diabase 53 isotopic analysis 53 U Th 53 tuffaceous rocks 53 isotopic signature 53 protoplanetary disks 53 Doushantuo Formation 52 sulfide deposits 52 basalt volcanic 52 fossilized coral 52 coccolithophores 52 arsenate 52 granitic pegmatite 52 allanite 52 sulfate salts 52 sulphide deposits 52 anomalous concentrations 52 depositional environment 52 protostars 52 ostracods 52 planktonic foraminifera 52 eluvial 52 Permo Triassic 52 mineral apatite 52 hematite mineral 52 carbonaceous meteorites 52 biosignatures 52 iridium 52 iron sulphides 52 manganese oxide 52 geoneutrinos 52 mineralized mafic 52 komatiite 52 terranes 52 Ediacara 52 silicate 52 dolomites 52 supercontinents 52 magma chambers 52 chrysocolla 52 sulphide mineral 52 hominid fossils 52 pyrophyllite 52 ultramafic intrusives 52 Proterozoic basement 52 geological strata 52 Toba eruption 52 silicic 52 phlogopite 52 rocky planets 52 H. habilis 52 amphibole 52 isotopic variations 52 greenstones 52 diorites 52 geologically 52 sunlike stars 52 chrome diopside 52 radiogenic 52 Chert 52 Allende meteorite 52 Earthlike 52 geologic 52 clasts 52 AU Mic 52 saprolitic 52 amphibolites 52 gabbroic rocks 52 ramidus 52 electron pairing 52 greisen 52 molybdenite MoS2 52 komatiitic 52 granites 52 gabbroic 52 Banded Iron Formation 52 petrological 52 ignimbrites 52 ancient supercontinent 51 crustal 51 palaeo 51 IR spectra 51 clastic 51 pillow lavas 51 granitoids 51 uranium ores 51 olivine macrocrysts 51 volcanism 51 lithosphere 51 Permian Period 51 radiocarbon tests 51 Stromatolites 51 epidote 51 sedimentary 51 silcrete 51 titanium zirconium 51 palaeoclimate 51 tektites 51 microscopic specks 51 Palaeozoic 51 phosphorite 51 clay mineralogy 51 heavily cratered 51 zinc sulfide 51 mineralized intrusive 51 kaolinite 51 noble gases 51 finely disseminated 51 Blombos 51 paleochannel 51 silicate grains 51 seafloor sediment 51 globulars 51 uraninite 51 Cryogenian 51 spatially resolved 51 microdiamond 51 Mesoproterozoic 51 nitrogen isotopes 51 spodumene rich 51 samarium 51 Mg Ca 51 hominid fossil 51 optically stimulated luminescence 51 zeolites 51 granitic rocks 51 cryovolcanism 51 neodymium Nd 51 felsic rocks 51 Cenozoic Era 51 kimberlitic indicator minerals 51 seabed sediments 51 Kuiper belt objects 51 claystone 51 carbonaceous 51 iron pyrite 51 Maunder minimum 51 mineralized boulders 51 Petrographic 51 interstellar grains 51 meteorite impacts 51 Late Jurassic 51 Cretaceous Paleogene boundary 51 basalt flows 51 bastnasite 51 specular hematite 51 clastic sediments 51 globular clusters 51 minerals 51 peridotite 51 magmatism 51 glaciation 51 stratigraphic sequence 51 cosmogenic 51 evaporite 51 placental mammals 51 Kepler #b 51 extrusive 51 promethium 51 quartz feldspar porphyries 51 lunar craters 51 volcanic rock 51 strange quark 51 planetesimal 51 sedimentary sequences 51 mineralogical 51 basalt 51 microfossil 51 sedimentary formations 51 Late Ordovician 51 asthenosphere 51 bonebed 50 heterogeneities 50 volcano sedimentary sequence 50 kimberlite indicator minerals 50 magmatic 50 muscovite 50 carbonate rocks 50 Monazite 50 pluton 50 radiocarbon dating 50 sylvite 50 phytoliths 50 lateritic 50 anamensis 50 spectroscopically 50 pyrochlore 50 manganese oxides 50 ferruginous 50 Quaternary 50 elemental abundances 50 carbonate sediments 50 radioactive decay 50 leachability 50 trimers 50 volcanic sediments 50 REE enriched 50 sulphide minerals 50 otoliths 50 Precambrian rocks 50 nitrogen isotope 50 meteorite bombardment 50 feldspars 50 asteroidal 50 diatremes 50 ocean sediment cores 50 Merensky Reef 50 Raman spectra 50 gneisses 50 Eocene 50 coprolite 50 copper sulphides 50 intensely oxidized 50 colluvial 50 beryl 50 interglacial periods 50 martian rocks 50 earths 50 nephrite 50 lamproite 50 Proterozoic 50 icy moons 50 petrographic analysis 50 garnets 50 pyrite marcasite 50 crystalline silicates 50 bedrock outcrops 50 Chicxulub impact 50 planetary nebulae 50 basaltic magma 50 bearing pegmatites 50 lithium oxide 50 Molybdenite 50 gossan zones 50 alluvial deposits 50 orpiment 50 Geochemical analysis 50 niobium oxide 50 basaltic rock 50 geophysically 50 dickite 50 melanosomes 50 LREE 50 stalagmite 50 rhyolites 50 organic molecules 50 intrinsic brightness 50 isotopic measurements 50 unweathered 50 Noachian period 50 chromitite layers 50 amphibolite facies 50 chalcedony 50 spectral signatures 50 meta sedimentary 50 unoxidized 50 platinum Pt 50 manganese dioxide 50 lanthanides 50 ytterbium 50 octahedral 50 cinder cones 50 Tooth enamel 50 calcium fluoride 50 cometary material 50 pyroclastics 50 siderite 50 Lower Cretaceous 50 mineralogically 49 Myr 49 porphyry mineralization 49 itabirite 49 alkalic 49 mineral olivine 49 cherts 49 biominerals 49 diatoms 49 GJ#b 49 Earth crust 49 tectonically 49 supergene copper 49 evaporites 49 metasomatic 49 missing baryons 49 geochemical signature 49 habilis 49 microprobe analysis 49 NEAs 49 Ediacaran 49 meteoritic material 49 illite 49 boron nitride 49 copper oxides 49 meta sedimentary rocks 49 REEs 49 manganese nodules 49 Globular clusters 49 manganese mineralization 49 mafic rocks 49 surface outcrops 49 planetesimals 49 Kambalda style 49 Hesperian epoch 49 photosynthetic pigments 49 outcropping mineralized 49 magnetic susceptibility 49 permanently shadowed craters 49 meteoritic 49 palaeontological 49 eclogitic garnets 49 coral skeletons 49 chondrite 49 planemos 49 PGEs 49 subduction zones 49 BIF outcrops 49 hematite goethite 49 Zn Cu 49 Neanderthal fossils 49 type Ia supernova 49 niobium Nb 49 schistose 49 evaporite deposits 49 felsic intrusions 49 Cr#O# 49 methanogens 49 sedimentological 49 overlying layers 49 fossilization 49 diffraction patterns 49 amphibolite 49 morphologies 49 Cenozoic 49 Neanderthal skeletons 49 AB Aurigae 49 Meridiani 49 mafic flows 49 azurite 49 spectroscopic analysis 49 terrestrial planets 49 dwarf galaxies 49 smectite 49 hematite magnetite 49 Radiocarbon dating 49 phylogenetically 49 Early Joli Fou 49 quartz feldspar 49 dinosaur species 49 volcanogenic 49 medium grained 49 greywackes 49 aluminum silicate 49 zircon crystal 49 molybdenite mineralization 49 magnesium silicate 49 electrum 49 Palaeozoic sedimentary 49 Paleoproterozoic 49 exhalite 49 microhabitats 49 stockwork veins 49 AGNs 49 porphyry copper molybdenum mineralization 49 ejecta blanket 49 Selwyn Basin 49 Kimberlite indicator 49 Neolithic Age 49 spodumene 49 dunite 49 metamorphism 49 isotopic signatures 49 surficial 49 quartz 49 chemical composition 49 lunar regolith 49 anomalous REE 49 pegmatite dikes 49 carbonate veins 49 lutetium 49 plutons 49 calcic 49 earth crust 49 gravity anomalies 49 elliptical galaxies 49 variably silicified 49 quasicrystal 49 lunar magma 49 vertebrate fossils 49 carbides 49 partial skeleton 49 siliciclastic 49 BP Piscium 49 fluorapatite 49 nickel Ni 49 sedimentary basins 49 faunas 49 massive sulfide mineralization 49 magnesium carbonates 49 copper sulfide 49 Kuiper Belt Objects 49 extrasolar 49 realgar 49 dolomite 49 Henize #-# 49 homochirality 49 organism genome 49 ULIRGs 49 laterites 49 medullary bone 49 ellipsoids 49 IRC +# 49 Upper Triassic 49 microscopic fossils 49 Cambrian Ordovician 49 hydrate deposits 49 radiocarbon analysis 49 supergene 49 hominid footprints 49 diatom 49 lithium tantalum 49 naturally occurring mineral 49 superheavy element 49 tholins 49 meteor impacts 48 evaporite minerals 48 lunar meteorite 48 superheavy elements 48 morphological evolution 48 hydrogen isotopes 48 ultramafic rock 48 secondary chalcocite 48 interglacial 48 lava tubes 48 pegmatite dykes 48 metallicity 48 J# +# [002] 48 magnetite BIF 48 gDNA 48 lobate scarps 48 Chromite 48 massive sulphide lenses 48 Valles Marineris 48 topological insulator 48 Dry Valleys 48 δ 48 Cambrian Period 48 mafic intrusion 48 Cretaceous Tertiary boundary 48 specularite 48 carbonatite 48 Alaskite 48 granodiorite porphyry 48 dinosaur footprints 48 pyroxenite 48 micrometer sized 48 sedimentary strata 48 Nili Fossae 48 limestones 48 granitic basement 48 pillow lava 48 placer gold 48 regolith 48 Transantarctic Mountains 48 sediment cores 48 deformational 48 Gigantopithecus 48 clathrates 48 lamprophyre 48 carbon cenospheres 48 tetrapods evolved 48 carbonaceous chondrite meteorites 48 quasicrystals 48 vanadium oxide 48 anomalously 48 limestone xenoliths 48 cerium 48 felsic volcanics 48 petrography 48 yttrium Y 48 Neanderthal bones 48 polymorphs 48 magnetic monopoles 48 placental mammal 48 Kounaves 48 serpentinized peridotite 48 mineralogical analysis 48 multicellular animals 48 schists 48 macrodiamond 48 Morganucodon 48 vanadium mineralization 48 dacite 48 Noachian era 48 IOCG deposits 48 antineutrinos 48 banded iron 48 fractal patterns 48 massive sulphide deposit 48 biotite 48 cuprates 48 Martian rocks 48 intrusive rocks 48 biomineralization 48 Bedout 48 interstellar molecules 48 geophysical conductors 48 COROT 7b 48 hydrothermal activity 48 geological formations 48 pitchblende 48 carnotite 48 A. africanus 48 Radiocarbon 48 Type Ia 48 sericite schists 48 fossilized pollen 48 Ontario Lacus 48 tremolite 48 supergene mineralization 48 supernova explosions 48 disseminated sulphide mineralization 48 baryons 48 shear modulus 48 iron oxide 48 spatial variability 48 Blombos Cave 48 spectral fingerprints 48 prebiotic molecules 48 P. boisei 48 Gondwanaland 48 Elysium Planitia 48 fossils unearthed 48 finely disseminated pyrite 48 Gliese #g 48 conductivity anomalies 48 preserved fossils 48 mineralogical composition 48 epithermal deposit 48 silicified limestone 48 southern supercontinent 48 nacre 48 iron arsenide 48 chromitite 48 nuclides 48 sulfate minerals 48 pyroxenites 48 binary asteroid 48 placer deposits 48 quartz pebbles 48 hominid species 48 macrodiamonds 48 copper skarn 48 acid leached 48 antimony mineralization 48 cretaceous 48 stratigraphy 48 fossilized 48 flood basalts 48 siliceous 48 Tarduno 48 landforms 48 circumstellar 48 rhenium Re 48 mammal fossils 48 unconventional superconductivity 48 Ordovician 48 volcanic tuff 48 olivine mineral 48 anatase 48 chalcogenides 48 Oklo 48 Kostenki 48 starburst galaxies 48 animal phyla 48 supernova explosion 48 serpentinized 48 fossilized teeth 48 spectroscopic measurements 48 anomalism 48 distant quasars 48 Denisovan 48 fungal genomes 48 Amundsen Sea 48 lakebed sediments 48 chalcedonic 48 crinoid 48 Proterozoic aged 48 paleoclimate 48 dirty snowballs 48 basaltic lava 48 magnetite bearing 48 peridot 48 actinolite 48 Balarat Project 48 Middle Awash 48 Tertiary Period 48 FeO 48 kimberlitic 48 neutrino experiments 48 Dauphas 48 sulfide bearing 48 plate tectonics 48 icy comets 48 diopside 48 brittle deformation 48 metal zonation 48 igneous intrusion 48 mica schist 48 alexandrite 48 finely layered 48 carbonatite dykes 48 niobium mineralization 48 graphene membranes 48 greenschist 48 crinoids 48 phyllite 48 Arsenopyrite 48 lanthanum La 48 hydrothermal magnetite 48 bearing kimberlite 48 interplanetary dust 48 lithospheric 48 porphyritic 47 polar craters 47 tuffs 47 SN Ia 47 ultramafic rocks 47 relative abundances 47 kimberlitic material 47 supernovae 47 facies 47 sulphides pyrite 47 Cryogenian period 47 pyritic quartz 47 argillites 47 SN#A 47 magnetite mineralization 47 intrusive granitic 47 Geologically 47 microscopic crystals 47 palaeochannels 47 noctilucent clouds 47 acid soluble 47 catalytically active 47 Antarctic Dry Valleys 47 chlorite altered 47 nanosized 47 lithogeochemical 47 Amundsen Sea Embayment 47 scheelite 47 structural lineaments 47 Pliocene 47 paragneiss 47 ab initio calculations 47 manto mineralization 47 cometary dust 47 subglacial 47 disseminated chalcopyrite 47 calcite crystals 47 felsic tuff 47 single celled algae 47 ejecta 47 octahedron 47 pyrite arsenopyrite 47 rhyolite 47 supercontinent 47 Middle Pleistocene 47 anhydrite 47 inorganic mercury 47 biota 47 molybdenum Mo 47 microbial mats 47 A. sediba 47 mya 47 magnetite 47 Makovicky 47 moonlet 47 graphitic carbon 47 iridium layer 47 mineralized skarn 47 bryozoans 47 lithologies 47 intermetallic compounds 47 carbonate 47 overlying sediments 47 subglacial lakes 47 disseminated sulfide 47 ferric oxide 47 Outcrops 47 interstellar dust grains 47 pyrrhotite pyrite 47 carbonaceous mudstone 47 crystal lattices 47 dacitic 47 MgO 47 fossil 47 electron microprobe 47 Lower Proterozoic 47 mafic intrusions 47 NASA Wilkinson Microwave 47 G# garnets 47 element boron 47 paleoecology 47 mineralogical characteristics 47 Middle Paleolithic 47 uranophane 47 interstellar cloud 47 scandium yttrium 47 gossanous 47 felsic intrusives 47 colloidal crystals 47 Nickel laterite 47 Sedimentary 47 cerium Ce 47 vesper bats 47 Paleocene Eocene Thermal Maximum 47 mastodon tusk 47 spicule 47 quartz feldspar porphyry intrusive 47 geological 47 kimberlite boulders 47 hydroxyl molecules 47 REE minerals 47 hydrothermally altered 47 Cretaceous 47 volcaniclastics 47 Aram Chaos 47 G#.# +#.# 47 SDSS II 47 Alum Shale 47 KamLAND 47 brown dwarfs 47 Sediments 47 Panderichthys 47 Orrorin tugenensis 47 aluminous 47 exoplanets orbiting 47 archaea 47 Upper Cretaceous 47 andesitic rocks 47 Late Cretaceous 47 Late Triassic 47 REE deposits 47 carbonyl sulfide 47 kimberlite pipes 47 diorite intrusive 47 Holocene epoch 47 Cu Ag 47 sedex 47 sulfidic 47 SN #gy 47 cinnabar 47 lacustrine 47 Pense Kimberlite 47 grabens 47 alloying elements 47 fossilized creatures 47 dentine 47 impactors 47 electron density 47 silicon monoxide 47 Tagish Lake meteorite 47 Nikku Madhusudhan 47 rhyolite tuffs 47 silicified zone 47 aerosol particles 47 paleoenvironmental 47 ophiolitic 47 jasperoids 47 intrusives 47 bristlecone pine 47 P. robustus 47 hominoids 47 alluvial diamond deposits 47 nanodiamonds 47 comets 47 cuprate superconductors 47 V# Mon 47 Earthlike planets 47 magnetar 47 planetary geologists 47 porphyritic intrusions 47 cherty 47 Oort cloud 47 strontium titanate 47 snail shells 47 reionization 47 Ardipithecus