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(Click for frequent words.) 67 hydrated silica 67 phyllosilicate 66 metamorphic rock 66 hydrated minerals 66 phyllosilicates 65 sulfate salts 65 mineral hematite 65 silicate rocks 64 jarosite 63 basalt volcanic 63 volcanic basalt 63 silicate minerals 63 mineral olivine 62 sedimentary deposits 62 lacustrine 62 hematite mineral 62 goethite 62 tuffaceous rocks 62 rubbly 61 iron sulfide 61 silicates 61 concretions 61 Palaeozoic sedimentary 61 magnesium sodium potassium 61 hematite goethite 61 gray hematite 61 claystone 61 olivine rich 60 olivines 60 evaporite 60 silicate mineral 60 microbialites 60 tholins 60 iron sulfate 60 alteration halos 60 pediment gravels 60 chrysocolla 60 seabed sediments 60 volcanic lava 60 isotopic compositions 60 oxidized iron 59 calcite crystals 59 Methane hydrate 59 halite 59 glacial outwash 59 eclogite 59 montmorillonite 59 windblown sand 59 karstic 59 single celled microorganisms 59 stony meteorites 59 pyroxene 59 calcareous 59 igneous rock 59 single celled algae 59 iron oxides 59 humic 59 amorphous silica 59 recrystallized 59 inorganic salts 59 evaporite deposits 59 lithium bearing brines 59 quartz tourmaline breccia 59 clayey 59 naturally occurring mineral 59 Outcrops 59 chemosynthetic 59 gypsum crystals 59 malachite azurite 59 smectite 59 Sulfates 59 lateritic 59 microscopic crystals 59 basaltic rocks 58 nitrogen fixers 58 micaceous 58 tufa 58 terra preta 58 Sedimentary rocks 58 sand silt 58 microhabitats 58 sulfide minerals 58 Calcium carbonate 58 hydrothermally 58 aluminum silicate 58 cherts 58 dolomites 58 layered sedimentary rock 58 carbonaceous material 58 exhalite 58 hydrothermal fluid 58 martian rocks 58 silicate dust 58 kaolinite 58 Sphagnum 58 ferruginous 58 crystalline silicates 58 finely disseminated 58 freshwater lakes rivers 57 silica carbonate 57 carbonate globules 57 stromatolites 57 carbonate minerals 57 illite 57 stromatolite 57 hydrous 57 manganese oxides 57 ancient lakebed 57 lepidolite 57 ferric oxides 57 igneous rocks 57 aragonite 57 hornblende 57 microfossil 57 Diatoms 57 volcanic lava flows 57 silicic 57 unicellular algae 57 paleochannel 57 chemically reactive 57 Lengai 57 isotope fractionation 57 geophagy 57 alluvial soils 57 sedimentary rock 57 hydroxides 57 claylike 57 crystallites 57 sandy loams 57 overlying layers 57 pyrite galena 57 ostracods 57 isotopic signature 57 spherules 56 isotopic ratios 56 calcium sulphate 56 mildly alkaline 56 variably silicified 56 magmas 56 speleothems 56 basaltic rock 56 Syrtis Major 56 overlying sediments 56 bacterial mats 56 intrusive granitic 56 quartz calcite 56 unweathered 56 calcic 56 zinc sulfide 56 biomineralization 56 Zooplankton 56 carbonaceous chondrites 56 bacterial decomposition 56 metamorphic rocks 56 iron sulphides 56 infertile soils 56 granodiorite porphyry 56 sediments deposited 56 carbonate sediments 56 sulfosalts 56 lunar craters 56 mineralogical composition 56 evaporites 56 sandstone limestone 56 sediments 56 soluble salts 56 pyrrhotite chalcopyrite 56 Arsenic occurs 56 microbial mats 56 sphagnum 56 Meridiani 56 chalcopyrite bornite 56 barium strontium 56 silicate mantle 56 Petrified wood 56 Terra Preta 56 pyroclastics 56 mineral apatite 56 hydrothermal fluids 56 sulfidic 55 detrital 55 anorthosite 55 called gray hematite 55 placer deposits 55 Precambrian rocks 55 bentonite clay 55 carbonaceous chondrite 55 Permo Triassic 55 BIFs 55 petroliferous 55 abyssal plain 55 volcanic pumice 55 lapilli 55 alteration assemblages 55 cratons 55 radioactive nuclei 55 granitic basement 55 colluvial 55 forams 55 pyrite marcasite 55 microbial degradation 55 anaerobic decomposition 55 hydrothermal venting 55 phosphorous potassium 55 basaltic 55 serpentinized 55 limestone bedrock 55 karst geology 55 spectral fingerprints 55 ultramafic intrusives 55 erosional 55 permanently shadowed regions 55 waxy coating 55 peridotites 55 stockwork breccia 55 Saturn Enceladus 55 diatomaceous 55 gabbros 55 stratigraphic sequence 55 Globular clusters 55 tinted crimson 55 fine grained sedimentary rock 55 bryozoan 55 opaline silica 55 porphyritic intrusive 55 Ontario Lacus 55 earthlike 55 andesitic volcanic rocks 55 icelike 55 inorganic minerals 55 metal zonation 55 schistose 55 silicate 55 Geochemical analysis 55 biominerals 55 anhydrite 55 sulfide deposits 55 manganese oxide 55 coarser grained 55 soils 55 naturally occurring minerals 55 icy crust 55 fossilized shells 55 synchrotron x ray 55 reef organisms 55 vein quartz 55 ejecta blanket 55 shallow depressions 55 immiscible 55 mud volcanoes 55 coralline 55 photosynthetic microbes 54 lobate 54 Polycyclic aromatic hydrocarbons 54 mollusk shells 54 magnesium carbonates 54 Geologically speaking 54 active volcanism 54 olivine 54 abiotic 54 loam soils 54 clasts 54 marine sediments 54 Terra Meridiani 54 ferrous oxide 54 pyrophyllite 54 andesitic rocks 54 fine grained sandstone 54 silica 54 chemosynthesis 54 sodium magnesium 54 potassium feldspar 54 Middle Awash 54 selenite 54 pyrite chalcopyrite sphalerite 54 organo 54 algal species 54 flood basalts 54 porous sandstone 54 Methane hydrates 54 aluminosilicate clay 54 acidifies 54 sulfur isotopes 54 mesoporous 54 volcaniclastics 54 plagioclase 54 ferric oxide 54 shadowy craters 54 bicarbonate ions 54 sedimented 54 amphibolites 54 biotite rich 54 McMurdo Dry Valleys 54 element boron 54 Brine shrimp 54 solidified lava 54 hypersaline 54 quartz adularia 54 fine grained sediments 54 sulphates 54 Carbonate rocks 54 silicified limestone 54 oligotrophic 54 volcanic tuff 54 microscopic fossils 54 basaltic lava 54 Prussic acid 54 glacial boulder 54 tetrapods evolved 54 microscopic single celled 54 limy 54 tartaric 54 siderite 54 lithological contacts 54 thermally mature 54 lavas 54 green alga 54 Daisetta sits 54 bastnaesite 54 Navajo sandstone 54 conodonts 54 argillization 54 lunar crust 54 filamentous algae 54 monazite 54 calcium carbonates 54 loess 54 Domoic acid neurotoxin 54 Lophelia 54 lava tubes 54 disseminated pyrrhotite 54 abyssal plains 54 igneous 54 clay loam 54 outwash 54 sedimentary strata 54 alkalic 54 atmospheric deposition 54 celled organisms 54 disseminated sulfide 54 Doushantuo Formation 54 organometallic compounds 54 multi celled 54 heterolithic 54 brittle deformation 54 chalcopyrite copper 54 bearing hydrothermal 54 siliciclastic 54 magmatic sulphide 54 thermophiles 54 molten magma 54 microbial organisms 54 haematite 54 Ohmoto 54 Antarctic Dry Valleys 54 tremolite 54 yardangs 54 Tooth enamel 54 zeolites 54 autotrophic 54 alteration mineralogy 54 mosses lichens 54 tailing piles 54 carbon isotopes 54 Aram Chaos 54 crustal rocks 54 mafic intrusives 54 magnetite crystals 54 geology paleontology 54 pre biotic 54 meteor impacts 54 alkaline soils 54 porphyry intrusions 53 dirty snowballs 53 alluvial plains 53 anastomosing 53 Lower Jurassic 53 Zeolites 53 volcanic sediments 53 iron titanium oxide 53 decaying vegetation 53 meteorite craters 53 apatite 53 galena pyrite 53 turbidites 53 sedimentary sequences 53 REE bearing 53 basalt 53 limestone dolomite 53 quartz alunite 53 stalactites stalagmites 53 Plate tectonics 53 brecciated quartz 53 quartz feldspar 53 methane clathrate 53 microfossils 53 planetary geologists 53 sedimentary layers 53 layered ultramafic 53 chondrules 53 ignimbrites 53 amphibole 53 hematite chlorite 53 rhizosphere 53 sulphidic 53 felsic intrusion 53 photosynthetic organisms 53 mineral assemblages 53 diorites 53 subsurface ocean 53 acidic soils 53 glacial till 53 spinels 53 hydrocarbon accumulations 53 volcanic arcs 53 pillow basalts 53 Montmorillonite 53 alluvial diamond deposits 53 fulvic acids 53 subterranean caves 53 marine plankton 53 phosphonates 53 calcium salts 53 fine grained sediment 53 olivine mineral 53 chrome diopside 53 humic acids 53 diabase 53 Stromatolites 53 loam soil 53 lithium boron 53 calcite 53 unicellular organisms 53 Jurassic sandstone 53 paleo placer 53 Microcystis 53 leaf undersides 53 rotifer 53 pegmatite hosted 53 elemental composition 53 microscopic creatures 53 porphyritic intrusive rocks 53 sedex 53 Mosquito larvae 53 basaltic magma 53 sulphides pyrite 53 Late Paleozoic 53 surficial 53 mafic intrusion 53 rhyodacite 53 coral skeletons 53 nutria ate 53 felsic metavolcanic 53 epidote 53 sandstone siltstone 53 cryovolcanism 53 oceanic crust 53 Navajo Sandstone 53 protoplanetary discs 53 subseafloor 53 magnesium silicate 53 leachability 53 carbonyl sulfide 53 polar layered 53 porous limestone 53 Candor Chasma 53 soils sediments 53 Hellas Planitia 53 naturally occurring 53 vugs 53 mucilage 53 potash brine 53 disseminated pyrite mineralization 53 chondritic meteorites 53 quartz boulders 53 coccolithophores 53 fluid inclusions 53 eclogitic 53 felsic tuffs 53 groundwaters 53 electrum 53 hydrosphere 53 ancient supercontinent 53 inorganic compounds 53 freshwater springs 53 moisture seeps 53 magnesium potassium 53 Chalcopyrite 53 mudstone 53 carbonate alteration 53 geochronology 53 post perovskite 53 anaerobic microbes 53 crystalline solids 53 hydrothermal magnetite 53 subglacial 53 Fe Mn 53 subhorizontal 53 karst limestone 53 basalts 53 coralline algae 53 macrofauna 53 clathrates 53 Felsic 53 mylonite 52 Martian crust 52 unconventional superconductivity 52 Mesoproterozoic 52 CAIs 52 inorganic contaminants 52 pillow lava 52 crossbedding 52 Paleozoic sedimentary 52 Volcanic gases 52 Caracol Formation 52 circular depressions 52 Pollen grains 52 pegmatitic 52 tuffs 52 dwelling organisms 52 eluvial 52 seafloor sediments 52 permanently shadowed craters 52 foraminifera 52 sodium potassium magnesium 52 diatom species 52 oxidized copper 52 meteorite impacts 52 COROT 7b 52 Sulphates 52 siliceous 52 planktons 52 chalcedonic silica 52 mutualistic relationship 52 copper skarn 52 Dragon Mine halloysite 52 concretion 52 syenite gneiss 52 glacial moraine 52 subsoils 52 methane ethane 52 chlorophyll molecule 52 nebular 52 planet Gliese #c 52 starch granules 52 argillaceous 52 serpentinite 52 moisture retentive 52 mushrooms truffles 52 hematite stained 52 biodiverse ecosystems 52 specularite 52 peridotitic 52 isotope composition 52 cenospheres 52 nanosized 52 silicon dioxide SiO2 52 saprolitic 52 loamy soils 52 silicate grains 52 volcano sedimentary sequence 52 komatiites 52 circumstellar 52 silicified rocks 52 phytoliths 52 permeable sandstone 52 amorphous calcium carbonate 52 fluorapatite 52 Tharsis Rise 52 epitaxially 52 isotope ratios 52 limonitic 52 anomalies coincident 52 phosphorite 52 sunlike stars 52 quartz feldspar porphyries 52 layered bedrock 52 algal mats 52 massifs 52 enargite 52 interstellar cloud 52 repels insects 52 methane seeps 52 fungi algae 52 comets asteroids 52 colorless crystalline 52 oceanic lithosphere 52 phenanthrene 52 granite outcroppings 52 Pavonis Mons 52 glacial meltwater 52 presolar 52 silica microspheres 52 komatiitic 52 inorganic substances 52 altered ultramafic 52 Proteobacteria 52 sylvite 52 pyrope garnet 52 salt crystals 52 limestones 52 agar agar 52 finely disseminated pyrite 52 grabens 52 sulphide mineral 52 supergene enriched 52 bark crevices 52 shadowed craters 52 nitrates phosphates 52 subalpine meadows 52 lunar soil 52 Socompa 52 glacial erratics 52 PFCAs 52 southern supercontinent 52 homochirality 52 continental crust 52 pelites 52 Haematococcus pluvialis 52 cherty 52 pyrites 52 meta sedimentary rocks 52 Cyanobacteria 52 karst topography 52 algae fungi 52 depositional environment 52 smoothest flattest 52 silica breccia 52 insolubles 52 rock outcrops 52 kyanite 52 isotopic composition 52 calcareous soils 52 gallic acid 52 basalt rocks 52 pillow lavas 52 Neoproterozoic 52 pathfinder element 52 microplastics 52 volcano sedimentary rocks 52 sodium salts 52 Wassonite 52 quartz pebbles 52 mollusks crustaceans 52 silicified zone 52 quartz biotite 52 surfactant molecules 52 stockwork veins 52 metavolcanics 52 finely layered 52 altered silicified 52 shallowly buried 52 lunar magma 52 suberin 52 presolar grains 52 microbiomes 52 carbonatites 52 covellite 52 alluvial gravel 52 monoterpenes 52 uppermost layer 52 clay mineralogy 52 Fossae 52 stockworked 52 Azolla 52 alluvial deposits 52 shrimplike 52 Eelgrass 52 adsorbed onto 52 gossanous 52 supergene mineralization 52 placer workings 52 Trichodesmium 52 erodable 52 aluminous 52 quartz hematite 52 potassium salts 52 kimberlite breccia 52 calcium carbonate skeletons 52 hydroxyl molecules 52 cottonseed hulls 52 ice nucleation 52 refugia 52 extremophile bacteria 52 epithermal deposits 52 decalcified 52 tungsten tin 52 palaeo 52 olivine crystals 52 comet nuclei 52 wettability 52 trilobite fossils 52 Thermus aquaticus 52 chlorite sericite 52 uncompacted 52 methane CH4 52 amphibole asbestos 52 fluorinated compounds 52 large oceanic plateaus 52 Nectocaris 52 cadmium sulfide 52 pyrite arsenopyrite 52 calcium silicate 52 shallow overburden 52 Mafic 52 quartz veinlet 51 thermal vents 51 sulfide veins 51 pore spaces 51 opaline 51 hydrophobicity 51 strontium isotope 51 brecciated silicified 51 loamy sand 51 landforms 51 mudstones 51 isotopic signatures 51 micronised 51 lake sediments 51 calderas 51 hornfels 51 COFs 51 collisional 51 schists 51 emergent vegetation 51 Martian dunes 51 Martian microbes 51 quartz magnetite 51 andesitic volcanics 51 sulphide minerals 51 rhyolite domes 51 prebiotic molecules 51 Archean basement rocks 51 microbes decompose 51 polymorphs 51 acid soils 51 reishi mushroom 51 hydrothermal activity 51 magma ocean 51 vanadium molybdenum 51 copper oxides 51 gneissic rocks 51 feldspars 51 REE Y Zr 51 gabbro intrusive 51 prehistoric archaeological 51 hematite magnetite 51 impermeable layer 51 biosignatures 51 fungus gnat 51 silver arsenic antimony 51 diatoms 51 advanced argillic 51 polar latitudes 51 isoprenoid 51 nitrates nitrites 51 graphite whiskers 51 chloritic 51 calcium bicarbonate 51 geology hydrology 51 unconformity uranium 51 disseminated arsenopyrite 51 Subterranean termites 51 vadose zone 51 heavily cratered 51 calcareous sandstone 51 biosignature 51 Overlying 51 sedimentary rocks 51 fungus spores 51 seafloor sediment 51 diatremes 51 impermeable shale 51 martian meteorites 51 sediments intruded 51 ammonia hydrates 51 carbonyls 51 algaes 51 KINSHASA Congo Fabulous 51 nitrogenous 51 oxidized mercury 51 uranium ores 51 shell middens 51 iron calcium potassium 51 ilmenites 51 proteinaceous 51 Erionite 51 metasediment 51 Fermented foods 51 microscopic pores 51 arsenopyrite bearing 51 fossilized coral 51 corundum 51 silicon monoxide 51 alluvial plain 51 carbonatized 51 calcium oxalate 51 methanogenesis 51 unoxidized 51 amphibolite 51 Kambalda style 51 magnesium carbonate 51 propylitic 51 corals sponges 51 peat moss vermiculite 51 felsic intrusives 51 inorganic mercury 51 pinkish brown 51 Elysium Planitia 51 asteroidal 51 drupes 51 coral polyp 51 biotite schist 51 gabbro dykes 51 leached capping 51 Gobero 51 silty 51 Bentonite clay 51 seafloor methane 51 lichen 51 supergene copper 51 shell midden 51 colluvium 51 magmatism 51 felsic tuff 51 ignimbrite 51 PGEs 51 gravelly soils 51 magnetite hematite 51 sterile neutrino 51 Au Cu Ag 51 geometrically shaped 51 lunar regolith 51 carbonaceous chondrite meteorites 51 ALH# 51 single celled bacteria 51 granite gneiss 51 stockwork vein 51 semidesert 51 subtidal 51 Kermadec Arc 51 inhibit microbial 51 phreatic 51 perchlorate salts 51 uranium thorium 51 garnet skarn 51 dichromate 51 cupric 51 subsurface geology 51 hydroxide ions 51 permanently shadowed 51 silty clay 51 microscopic fungi 51 sphagnum peat 51 surface hoar 51 green alga Chlamydomonas 51 pyrrhotite pyrite 51 Hydrogen atoms 51 supergene 51 Arsia Mons 51 polychaete worms 51 magnesium salts 51 mineralized intrusive 51 hematitic 51 tonalite 51 skarn horizons 51 rhyolite tuff 51 thinly layered 51 roseum 51 medium grained 51 lichens 51 copper sulphides 51 volcanogenic 51 titanium zirconium 51 Inorganic arsenic 51 paleomagnetic 51 sulfides 51 morphological similarities 51 allelopathic 51 xenoliths 51 DDT PCBs 51 chlorite altered 51 mussels barnacles 51 iron calcium magnesium 51 orogenic 51 stockwork veining 51 pteropod 51 Insecticidal soaps 51 multicellular animals 51 potassium carbonate 51 volcanic breccia 51 humic substances 51 lunar meteorites 51 crinoids 51 liverworts 51 amphibolite facies 51 Brackish water 51 Gas hydrates 51 felsic rocks 51 icy moons 51 stratiform 51 carbon cenospheres 51 magnesium calcium 51 granitic rock 51 alluvium 51 pyrope 51 planetesimal 51 deepwater corals 51 Sulphide mineralization 51 subcrop 51 clay loam soil 51 dimethyl sulfide 51 Cretaceous sandstones 51 chlorite epidote 51 shredded pine bark 51 regolith 51 single celled creatures 51 nitrogenous compounds 51 dacites 51 pyrite veins 51 carotenoid pigments 51 anticarcinogenic 51 photochemical reactions 51 abundant pyrite 51 oxidizing substance 51 siliceous sediments 51 B Chromitite 51 uranophane 51 quartz muscovite 51 Transantarctic Mountains 51 juglone 51 potassium thorium 51 quartz vein stockwork 51 actinolite 51 gold nanostars 51 mangrove vegetation 51 volcanic tuffs 51 manganese nodules 51 dimming starlight 51 evaporite minerals 51 organic compounds 51 amyloid beta plaques 51 volcanic magma 51 hornfelsed 50 dormant spores 50 inorganic acids 50 tardigrades 50 pome fruits 50 quartz breccias 50 lithosphere 50 Fulvic acid 50 limestone outcroppings 50 Jupiter moon Io 50 spheroidal 50 unicellular 50 bioaccumulation 50 indestructible BOB 50 Jurassic Cretaceous 50 diffuse aurora 50 depositional environments 50 carboniferous 50 HiRISE image 50 dolomitic 50 penicillium 50 silicified outcrops 50 pH acidity 50 Sandstones 50 epidote alteration 50 terra rossa 50 malachite mineralization 50 manganese zinc 50 alkaline soil 50 sandstone intervals 50 breccia mineralization 50 sediment 50 arsenic sulfide 50 absorbs CO2 50 silty sand 50 frog spawn 50 amphipods 50 Spiral galaxies 50 REE enriched 50 Gamba sandstone 50 tiny flecks 50 depositional 50 manganese dioxide 50 Slime molds 50 Salinas Grandes 50 quartz stringers 50 Stable isotopes 50 mycorrhizae 50 Orcus Patera 50 ultrabasic 50 igneous dikes 50 seafloors 50 silicic acid 50 geochemical signature 50 wetland soils 50 quartz sericite alteration