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(Click for frequent words.) 71 spherules 70 mineral hematite 68 phyllosilicates 67 olivine crystals 66 stony meteorites 66 jarosite 66 concretion 66 hydrated silica 65 stromatolite 65 magnetite crystals 65 lunar crust 65 silicate mineral 64 snail shells 64 volcanic basalt 64 sulfate salts 64 olivine 64 hematite mineral 64 hydrated minerals 63 speleothems 63 meteorite fragments 63 isotopic ratios 63 silicate minerals 63 sedimentary deposits 63 microscopic crystals 63 basalt volcanic 63 isotopic compositions 62 coprolite 62 igneous rocks 62 mineral apatite 62 metamorphic rock 62 aragonite 62 vugs 62 quartz grains 62 conodonts 62 igneous rock 61 lavas 61 phyllosilicate 61 corundum 61 sulfate minerals 61 lunar soil 61 basaltic rocks 61 calcite 61 chondrules 61 microfossil 61 spinels 61 montmorillonite 61 solidified lava 61 dinosaur skulls 61 zircons 61 Wassonite 61 zinc sulfide 61 carbonaceous material 61 mollusk shells 60 goethite 60 halite 60 carbonate globules 60 tholins 60 silicates 60 mineral olivine 60 turbidites 60 olivines 60 silicate mantle 60 salt crystals 60 petrified wood 60 calcite crystals 60 carbonaceous chondrites 60 olivine rich 60 meteor impacts 60 Meridiani 60 seafloor sediment 60 xenoliths 59 carbonate minerals 59 silicate rocks 59 Stromatolites 59 chondritic meteorites 59 lunar meteorites 59 spherical objects 59 isotopic composition 59 ferric oxides 59 stromatolites 59 igneous 59 iron oxides 59 pyrope garnet 59 crystallites 59 martian rocks 59 isotope ratios 59 stony meteorite 59 fossilized shells 59 tetrapods evolved 59 bryozoans 59 calcic 59 fossilized coral 59 cinder cones 59 shell midden 59 iron sulfate 59 fossilized dinosaur dung 58 lacustrine 58 radiocarbon dated 58 gray hematite 58 planktonic foraminifera 58 uraninite 58 nebular 58 azurite 58 carbon isotopes 58 biominerals 58 sand silt 58 Sedimentary rocks 58 ALH# 58 comet nuclei 58 microbial mats 58 chondritic 58 microscopic fossils 58 dirty snowballs 58 crystalline silicates 58 calcareous 58 sedimentary rock 58 ostracods 58 Ohmoto 58 ejecta blanket 58 crustal rocks 58 eclogite 58 phytoliths 58 icy moons 58 pyroxene 58 pottery sherds 58 microplastics 58 clasts 58 basalt rocks 58 hornblende 58 crystals 58 interstellar grains 58 Compact Reconnaissance Imaging Spectrometer 57 chondrites 57 carbonatites 57 aluminum silicate 57 lava tubes 57 agates 57 forams 57 tektites 57 siderite 57 crossbedding 57 vertebrate fossils 57 sedimentary layers 57 unweathered 57 Martian meteorites 57 Navajo Sandstone 57 crinoid 57 coral skeletons 57 fluid inclusions 57 finely disseminated 57 plagioclase 57 granite gneiss 57 calcium oxalate 57 planetesimal 57 cometary material 57 manganese oxides 57 microfossils 57 sulfur isotope 57 called gray hematite 57 coccolithophores 57 peridotitic 57 lamellae 57 amorphous calcium carbonate 57 stalactite 57 volcanic tuff 57 ammonites 57 chrome diopsides 57 claystone 57 naturally occurring mineral 57 apatite 57 cratons 57 garnets 57 opaline silica 57 globules 56 chrysocolla 56 landforms 56 nanosized 56 monazite 56 pyrope garnets 56 protoplanet 56 evaporite 56 carbon spherules 56 anorthosite 56 fossils 56 magnesium carbonates 56 pyrrhotite pyrite 56 hematite goethite 56 cherts 56 hydrothermally 56 basaltic 56 KBOs 56 silicate crystals 56 electrum 56 single celled algae 56 mammal fossils 56 yardangs 56 fossil specimens 56 eggshell fragments 56 biosignatures 56 basalts 56 Martian rocks 56 meteorites 56 whorled 56 circular depressions 56 Gusev crater 56 ilmenites 56 tiny flecks 56 isotope composition 56 Sinosauropteryx 56 microcrystals 56 seafloor sediments 56 graphite whiskers 56 skeletal fragments 56 Fe Mn 56 hematite 56 basalt 56 quartz crystals 56 silicate dust 56 rusticles 56 quasicrystals 56 Palaeozoic sedimentary 56 diatoms 56 spicule 56 carbonaceous meteorites 56 olivine mineral 56 pyrite galena 56 pottery jars 56 topmost layer 56 lunar regolith 56 iron sulfide 56 spheroidal 56 carbonaceous chondrite 56 comb jellies 56 claylike 56 martian meteorites 56 alternating layers 55 nephrite 55 scutes 55 dentine 55 spectral fingerprints 55 presolar grains 55 CAIs 55 coarser grained 55 strontium isotope 55 microcracks 55 Navajo sandstone 55 windblown sand 55 fossilized bone 55 multi celled 55 amphibole 55 volcanic lava flows 55 potsherds 55 trilobites 55 ferrous oxide 55 mineralized mafic 55 carbonate sediments 55 lichen 55 oxidized iron 55 microbialites 55 mastodon tusk 55 carbonaceous 55 spherical particles 55 sulfur isotopes 55 calcium oxalate crystals 55 sulfide deposits 55 interstellar dust grains 55 icy crust 55 foraminifera 55 polygonal shapes 55 morphologies 55 elemental composition 55 Martian craters 55 microbial organisms 55 iron sulphides 55 volcanic sediments 55 cometary dust 55 medium grained 55 volcanic lava 55 carnotite 55 collagen fibrils 55 osmium 55 beryl 55 tiny specks 55 metamorphic rocks 55 pinkish brown 55 dolomites 55 bilaterally symmetrical 55 microscopic specks 55 bryozoan 55 icosahedral 55 Ice Age mammals 55 labradorite 55 iron pyrite 55 eudialyte 55 tuffaceous rocks 55 oxygen isotopes 55 Meteorites 55 weakly interacting 55 Earthly contamination 55 icy comets 55 pallasite 55 smectite 55 tufa 55 Methane hydrate 55 olivine macrocrysts 55 micaceous 55 opaline 55 komatiites 55 stalactites stalagmites 55 middens 55 amorphous silica 54 ostrich eggshells 54 IR spectra 54 Allende meteorite 54 ferruginous 54 perchlorate salts 54 Blombos 54 magma ocean 54 carbonaceous chondrite meteorites 54 volcanic magma 54 lithic 54 phlogopite 54 dense clumps 54 fossilized pollen 54 quartz biotite 54 selenite 54 granitic pegmatite 54 Denisova cave 54 element osmium 54 pyrites 54 coprolites 54 diabase 54 primitive meteorites 54 obsidian 54 trilobite 54 asteroidal 54 Cretaceous Paleogene boundary 54 volcanic rock 54 Outcrops 54 undissolved 54 lunar craters 54 colluvial 54 pottery fragments 54 Petrified wood 54 permanently shadowed craters 54 nanoclusters 54 fossilized 54 sandy loams 54 planetary nebulas 54 post perovskite 54 elemental abundances 54 protoplanetary disks 54 Ediacara 54 Globular clusters 54 lunar magma 54 pyrope 54 fragments 54 kyanite 54 rubbly 54 chemically reactive 54 manganese cobalt 54 marine sediments 54 malachite azurite 54 amphorae 54 chert 54 Erionite 54 Diatoms 54 iridium layer 54 insect larva 54 Heterodontosaurus 54 quartz adularia 54 geochronology 54 tremolite 54 biomineralization 54 quasicrystal 54 polar craters 54 starch granules 54 sediments deposited 54 pyrite chalcopyrite sphalerite 54 micrometer sized 54 titanium oxides 54 Martian meteorite 54 Neoproterozoic 54 hydroxyapatite 54 Kuiper Belt Objects 54 pyrophyllite 54 kimberlite breccia 54 spectroscopic analysis 54 variably silicified 54 calcium bicarbonate 54 quartz calcite 54 feldspars 54 mineralogical composition 54 cartonnage 54 nanosized particles 54 gypsum crystals 54 penicillium 54 crania 54 nitrogen isotopes 54 otoliths 54 dichromate 54 dickite 54 regolith 54 meteorite impacts 54 geodes 54 volcanic pumice 54 mud volcanoes 54 fecal pellets 54 sterile neutrino 54 mafic flows 53 seabed sediments 53 isopods 53 Beachcombers collect tarballs 53 concentric layers 53 crinoids 53 lateritic 53 hemoglobins 53 cenospheres 53 undersea volcanoes 53 magnetic monopoles 53 coralline algae 53 morphological evolution 53 overlying layers 53 octahedral 53 potassium feldspar 53 asthenosphere 53 interstellar cloud 53 sulfide minerals 53 starch grains 53 medullary bone 53 calculi 53 brachiopods 53 Candor Chasma 53 merging galaxies 53 milky quartz 53 sedimentary strata 53 greywackes 53 marine invertebrate 53 ancient lakebed 53 Hydrothermal vents 53 crystalline solids 53 gastropod 53 clay loam 53 magmas 53 waxy coating 53 organic frameworks MOFs 53 jellylike 53 realgar 53 anhydrite 53 HiRISE image 53 mussel shells 53 pyrite marcasite 53 zircon crystal 53 microdiamonds 53 trimers 53 finely layered 53 calcium sulphate 53 oceanic crust 53 dino bones 53 zircon grains 53 eclogitic 53 phenanthrene 53 Kuiper belt objects 53 stibnite 53 KT boundary 53 mammoth tusks 53 trilobite fossils 53 unmelted 53 quartz feldspar porphyries 53 sunlike stars 53 layered bedrock 53 silicate 53 isotopic analysis 53 detrital 53 freshwater jellyfish 53 feldspar porphyry intrusive 53 Neanderthal fossils 53 chalky white 53 Murchison meteorite 53 partial skeleton 53 drupes 53 mudstone 53 vein quartz 53 microhabitats 53 micrometre sized 53 sherds 53 depositional environment 53 fluorapatite 53 Laonastes 53 glacial outwash 53 basalt rock 53 allanite 53 biomineral 53 fossilized bones 53 ultramafic intrusives 53 inorganic salts 53 protozoans 53 chiton 53 ellipsoids 53 abalone shells 53 biotite rich 53 algal mats 53 planetesimals 53 silicic 53 amphibolites 53 carbonatized 53 smoky quartz 53 pediment gravels 53 Pottery shards 53 mica schist 53 abalone shell 53 feldspathic 53 abundances 53 lanthanides 53 multicellular animals 53 organic molecules 53 otolith 53 chemosynthetic 53 chalcedonic silica 53 pigment granules 53 dinosaur specimens 53 pigmented wax 53 pyroclastics 53 unglazed clay 53 chambered nautilus 53 melt inclusions 53 serpentinite 53 Spiral galaxies 53 sulphide minerals 53 hematite magnetite 53 oxygen isotope 53 abyssal plains 53 Fullerenes 53 shell middens 53 perfectly spherical 53 lake sediments 53 felsic rocks 53 ferric oxide 53 heavily cratered 53 chalcedony 53 arsenopyrite pyrite 53 mummy wrappings 53 osteolytic lesions 53 isotopic signature 53 Syrtis Major 53 chrome diopside 53 octahedron 53 bonebed 52 electrons orbiting 52 Saturn outermost ring 52 BIFs 52 oxidized copper 52 meteorite 52 calcium carbonates 52 steatite 52 epidote 52 eluvial 52 loess 52 atomically flat 52 lobate scarps 52 nanohorns 52 zircon crystals 52 echinoderms 52 scheelite 52 paleochannel 52 melanosomes 52 Kambalda style 52 carbon isotope ratios 52 greenish brown 52 sulphide mineral 52 gabbros 52 haematite 52 Ontario Lacus 52 morphological characteristics 52 oxygen isotope ratios 52 anomalous concentrations 52 karst terrain 52 Mossbauer spectrometer 52 continental crust 52 quartz pebbles 52 Zeolites 52 chalcopyrite bornite 52 microbiomes 52 inorganic substances 52 Nectocaris 52 alteration halos 52 Saturn Enceladus 52 chitons 52 radiometric dating 52 thinly layered 52 T. rex bone 52 Doushantuo Formation 52 moondust 52 microbial degradation 52 Tianyulong 52 arsenic sulfide 52 basaltic rock 52 brittle deformation 52 semiprecious gems 52 sulphidic 52 sphagnum 52 noble gases 52 Calcium carbonate 52 chondrite 52 karst topography 52 fossilized dung 52 Martian gullies 52 radula 52 striations 52 skeletons skulls 52 ammonite 52 colored funerary masks 52 photosynthetic microbes 52 plesiosaur 52 cherty 52 pegmatitic 52 physicochemical properties 52 silica 52 veligers 52 illite 52 lobate 52 zeolites 52 tardigrades 52 lepidolite 52 purplish brown 52 oviraptors 52 moonlets 52 unicellular algae 52 circumstellar 52 fruiting bodies 52 serpentinized 52 pillow lava 52 karstic 52 plesiosaurs 52 excess uric acid 52 carbon cenospheres 52 pyritic quartz 52 disseminated sulfide 52 gossan zones 52 ichthyosaur 52 drusy 52 isotopic signatures 52 tubeworms 52 Neogene 52 pebbly 52 Elysium Planitia 52 fossilization 52 ionized hydrogen 52 greisen 52 meta sedimentary 52 solar nebula 52 dwelling organisms 52 sulfosalts 52 trabecular bone 52 microprobe analysis 52 waxy substance 52 planetary geologists 52 hydrous 52 crystal lattices 52 fossilized teeth 52 SWAN Repository 52 evaporites 52 Kermadec Arc 52 limonitic 52 molar teeth 52 stockwork veins 52 sulfide veins 52 isotope fractionation 52 peridotites 52 intensely oxidized 52 Proteobacteria 52 dinosaur bones 52 Neanderthal teeth 52 layered outcrops 52 molar tooth 52 muscovite 52 called lobate scarps 52 COROT 7b 52 mucilage 52 brachiopod 52 geode 52 pteropods 52 varying thicknesses 52 geological strata 52 dolerite 52 Di Achille 52 granitoids 52 mycelia 52 circumstellar disk 52 sediments 52 sandstone limestone 52 malachite mineralization 52 Pollen grains 52 rocks 52 saprolitic 52 gaseous planets 52 Anomalocaris 52 copper sulfide 52 McMurdo Dry Valleys 52 Siberian mammoths 52 silica particles 52 Trilobites 52 pyrite arsenopyrite 52 metazoan 52 carbonate veins 52 reddish color 52 feldspar 52 komatiitic 52 Fossilized bones 52 finely crushed 52 boron nitride 52 cumulus cloud 52 Caloris 52 basaltic lava 52 Arabia Terra 52 fossilized dinosaur 52 A. ramidus 52 wolf scat 52 sulfides 52 protoplanetary discs 52 branching corals 52 mineralogist 52 leachability 52 photomicrograph 52 argillites 52 silicate grains 52 shallow depressions 52 rock outcrops 52 arsenate 52 wooden sarcophagi 52 calcium carbonate 52 deformational 52 nautilus shells 51 fossilized creatures 51 Morganucodon 51 silcrete 51 Salvia greggii 51 dense LDL 51 Mars Squyres 51 rocky planets 51 martian soil 51 quartz feldspar porphyry intrusive 51 sodium magnesium 51 silvery scales 51 lipofuscin 51 mammoth ivory 51 proplyds 51 electron affinities 51 andesitic volcanic rocks 51 filamentary 51 Tagish Lake meteorite 51 malachite 51 whitish 51 protein clumps 51 glazed stoneware 51 microcompartments 51 Mini TES 51 breccia matrix 51 uranophane 51 HiRISE images 51 hydrothermal activity 51 atomic lattice 51 amphibolite 51 Sulfates 51 aluminosilicate 51 large oceanic plateaus 51 element boron 51 pyrite pyrrhotite 51 polymorphs 51 Mistaken Point 51 bear scat 51 P/# A2 51 Amyloid plaques 51 calcium carbonate limestone 51 hydroxyl molecules 51 bony structures 51 glazed pottery 51 felsic tuff 51 planetary nebulae 51 marcasite 51 metasediment 51 planets asteroids 51 mudstones 51 manganese nodules 51 amyloid peptides 51 limestone dolomite 51 nacre 51 sandstone formations 51 frog spawn 51 gray hematite mineral 51 evaporite deposits 51 greywacke 51 Jurassic limestone 51 cadmium selenium 51 chemically processed 51 Mars Meridiani Planum 51 shadowed craters 51 abiotic 51 encrustation 51 epitaxially 51 southern supercontinent 51 Geochemical analysis 51 recrystallized 51 siliceous 51 microstructures 51 granitic rock 51 iron meteorite 51 tunicates 51 spinel 51 molten magma 51 blobs 51 pillow lavas 51 electron microprobe 51 colloidal crystals 51 microscopic creatures 51 paleomagnetic 51 flood basalts 51 mammillary 51 mica 51 granuloma 51 quill knobs 51 clastic sediments 51 Neanderthal bones 51 lotus leaf 51 sedex 51 magnesium sodium potassium 51 Sinus Meridiani 51 Earthlike 51 nanobubbles 51 geoglyphs 51 uncompacted 51 superposed 51 hollow cylindrical 51 naturally occurring minerals 51 meteor craters 51 silica spheres 51 stoneware clay 51 meteoritic material 51 unoxidized 51 lapilli 51 COFs 51 finely disseminated pyrite 51 powdery residue 51 swim bladders 51 Paleozoic sediments 51 purplish color 51 pigment particles 51 methanogenesis 51 granite outcroppings 51 sauropod skulls 51 manganese oxide 51 glazed ceramics 51 CDOM 51 tyrannosaurids 51 crystalline structure 51 meteorite craters 51 bentonite clay 51 bullae 51 coffinette 51 magnesium Mg 51 Chlamydomonas reinhardtii 51 APXS 51 meteor fragment 51 cementum 51 Upper Carboniferous 51 stegosaur 51 diatomaceous 51 spectral signatures 51 green alga 51 greenish color 51 sulphates 51 amphipods 51 earthlike 51 disseminated sphalerite 51 unfired clay 51 outcrops 51 pyrite pyrrhotite chalcopyrite 51 titanium zirconium 51 Paleozoic sedimentary 51 carbides 51 terra cotta clay 51 burls 51 comets asteroids 51 volcaniclastic kimberlite 51 punctate 51 fossils unearthed 51 magma chambers 51 marine invertebrates 51 paragneiss 51 mammoth tusk 51 insolubles 51 turbulent eddies 51 seashells 51 iron alloy 51 calcium oxalate stones 51 blebs 51 enargite 51 ceramic shards 51 Dimetrodon 51 fullerene molecules 51 frass 51 liverwort 51 tonalite 51 floresiensis 51 microcalcifications 51 diatom 51 subsurface ocean 51 decaying vegetation 51 beads crystals 51 Cysts 51 vuggy 51 flints 51 strontium titanate 51 globulars 51 long necked sauropod 51 sylvite 51 clay mineralogy 51 pegmatite dykes 51 superheavy elements 51 osteocytes 51 refractive indices 51 elkhorn coral 51 birdlike dinosaur 51 schistose 51 impactors 51 carbonaceous mudstone 51 diffraction patterns 51 vanadium oxide 51 limestone bedrock 51 herbivorous dinosaurs 51 lithium bearing brines 51 quartz feldspar 51 clastic 51 yttrium barium copper 51 igneous intrusion 51 silicon monoxide 51 radiocarbon dates 51 abyssal plain 51 ice crystals 51 inner moons 51 magnetite grains 51 Veil Nebula 51 seafloors 50 enterotypes 50 calderas 50 tuffs 50 lobe finned fishes 50 yellow ocher 50 magmatic sulphide 50 disseminated arsenopyrite 50 underwater volcanoes 50 earths crust 50 flint arrowheads 50 Fibrous 50 clayey 50 silicified zones 50 pinkish gray 50 reddish orange hue 50 meteoritic 50 sedimentary rocks 50 chromites 50 pterosaur fossils 50 spicules 50 colloid 50 limestone xenoliths 50 collagenous 50 Chalcopyrite 50 ramidus 50 notochord 50 diorites 50 polymethylmethacrylate 50 spacecraft flyby 50 Woolly mammoth 50 suborder 50 cantaloupe sized 50 nanoscopic 50 polyphosphates 50 semiconducting properties 50 pyrrhotite chalcopyrite 50 quartz veins containing 50 feathered dinosaurs 50 reddish 50 Anomalous radioactivity 50 terrestrial vertebrates 50 globular 50 infrared spectra 50 magnetic excitations 50 gold nanostars 50 cobalt atoms 50 diatremes 50 clays 50 quartz stringers 50 kha nyou 50 autunite 50 Iguanodon 50 robustus 50 U Th 50 nutshells 50 sea anemones