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(Click for frequent words.) 69 marine sediments 67 sedimentary deposits 66 sediment cores 66 sediments 64 paleoenvironmental 64 paleoclimatic 64 paleomagnetic 62 microfossils 62 seabed sediments 62 basaltic rocks 61 paleoclimate 61 sedimentary layers 61 speleothems 60 phyllosilicate 60 radiocarbon dates 60 palaeo 60 geochemistry 60 igneous rocks 59 ocean sediment cores 59 carbon isotope ratios 59 Neogene 59 lavas 59 subglacial 59 terrestrial ecosystems 59 seafloor sediments 59 chondritic meteorites 59 lake sediment cores 59 lakebed sediments 59 seafloor sediment 58 geochemical 58 isotopic composition 58 zircons 58 sedimentary 58 KIMs 58 geochronology 58 palaeoclimate 58 martian meteorites 58 sedimentological 58 Neoproterozoic 58 radiocarbon 58 sediments deposited 57 microfossil 57 isotopic compositions 57 shell midden 57 subglacial lakes 57 carbon isotopes 57 cratons 57 silicic 57 Archaean 57 lateritic 57 forams 57 mineral apatite 57 Late Paleozoic 57 sulfur isotopes 57 Doushantuo Formation 57 landforms 57 eclogite 57 olivines 57 mammal fossils 57 paleochannel 57 olivine rich 57 isotope composition 57 paleoclimate records 57 bedrock outcrops 57 oxygen isotope ratios 56 isotope ratios 56 Martian meteorites 56 oxygen isotopes 56 jarosite 56 sulfur isotope 56 peridotites 56 sediment 56 Lake Bosumtwi 56 stromatolite 56 hominid footprints 56 radiocarbon dating 56 carbonate sediments 56 paleoclimatology 56 coccolithophores 56 sulphidic 56 clastic sediments 56 geomorphology 56 radiocarbon dated 56 outcropping mineralized 56 tuffaceous rocks 56 olivine crystals 56 Amundsen Sea 56 diatom species 56 turbidites 56 sedimentary rocks 55 glacial moraines 55 outcrops 55 colluvial 55 geomorphic 55 primitive meteorites 55 fossils unearthed 55 kimberlite indicator minerals 55 magmatic sulphide 55 alteration assemblages 55 layered ultramafic 55 biosignatures 55 fossilized coral 55 isotopic ratios 55 volcanic basalt 55 granitic basement 55 halite 55 Cryogenian 55 glaciations 55 fine grained sediment 55 Sphagnum 55 Transantarctic Mountains 55 glaciation 55 Laurentide ice sheet 55 pillow lavas 55 loess 55 fossilized pollen 55 hydrothermal activity 55 basalt volcanic 55 fluid inclusions 55 meteorite fragments 55 strontium isotope 55 mineralized intrusive 55 basaltic rock 55 glacial retreat 55 ferric oxides 54 amphibolites 54 brachiopods 54 stream sediment geochemical 54 alluvial sediments 54 basalts 54 sulfide minerals 54 cosmogenic 54 lunar crust 54 spatial variability 54 geologic 54 vegetation greenness 54 pyrope garnet 54 microbial mats 54 cave stalagmites 54 silicified zone 54 Laetoli 54 depositional environment 54 Gobero 54 tectonically 54 evaporite 54 Navajo Sandstone 54 Geochemical analysis 54 interglacial periods 54 anorthosite 54 BIFs 54 McMurdo Dry Valleys 54 petrographic studies 54 Lake Yoa 54 isotopic 54 glacial landforms 54 bathymetry 54 metal zonation 54 eluvial 54 Ontario Lacus 54 chrome diopside 54 pyritized 54 peridotitic 54 ignimbrites 54 gossanous 54 stalagmite 54 vegetations 54 mineralogy 54 Sediments 54 Middle Awash 54 deglaciation 54 volcanic rocks 54 glaciers receded 54 glacial till 54 clasts 54 radiometric dating 54 coralline 54 cherts 54 ferruginous 54 oxygen isotope 53 Siple Dome 53 metamorphic rocks 53 felsic rocks 53 biogeochemical 53 sediment samples 53 Toba eruption 53 pyrophyllite 53 silica breccia 53 greisen 53 spinifex 53 granodiorite porphyry 53 Sr Ca 53 hydrated minerals 53 gossan zones 53 siliciclastic 53 faunal 53 geophysically 53 Palaeozoic sedimentary 53 angiosperm 53 magnetic susceptibility 53 geochemical samples 53 hornblende 53 Dry Valleys 53 komatiites 53 sulphide deposits 53 ramidus 53 crustal thickness 53 glaciers 53 calcareous 53 komatiite 53 Ground penetrating radar 53 depositional 53 receding glaciers 53 soils 53 coral skeletons 53 abyssal plains 53 oceanic crust 53 chromitite layers 53 lichens 53 geochemical signature 53 petrography 53 iron sulphides 53 middens 53 U Th 53 magmatism 53 methane seeps 53 tailings piles 53 phyllosilicates 53 carbonaceous material 53 abundances 53 geological 53 stratiform 53 anomalous REE 53 Bosumtwi 53 pyrrhotite chalcopyrite 53 surface outcrops 53 concretions 53 sedimentology 53 hydrated silica 53 chromites 53 layered outcrops 53 aragonite 53 iron oxides 53 exhalite 53 petrological 52 uranium thorium 52 lunar meteorites 52 multi decadal 52 nitrogen fixation 52 conodonts 52 glacial outwash 52 glaciers retreated 52 supergene mineralization 52 Middle Devonian 52 mineralized mafic 52 megadroughts 52 Radiocarbon dating 52 carbon spherules 52 presolar grains 52 geochemistry anomalies 52 palaeontological 52 relict 52 terranes 52 atmospheric methane 52 BIF outcrops 52 magmatic rocks 52 rhyolites 52 epithermal alteration 52 silicate rocks 52 gold anomalism 52 unoxidized 52 vertebrate fossils 52 interglacial period 52 silica carbonate 52 pyrope 52 Laurentide Ice Sheet 52 ostracods 52 isotopic signature 52 amphibolite facies 52 cinder cones 52 structural lineaments 52 silica pyrite 52 phytoliths 52 stratigraphy 52 porphyry intrusions 52 headwater stream 52 pediment gravels 52 sedimentary sequences 52 stromatolites 52 alluvial deposits 52 ultramafic intrusives 52 Appy Sluijs 52 monazite 52 boreal regions 52 diorites 52 extrusive 52 mineralized skarn 52 supergene copper 52 Pense Kimberlite 52 magnetite crystals 52 receding glacier 52 fossils 52 petrographic 52 anomalies coincident 52 lithologies 52 Kermadec Arc 52 Martian gullies 52 dolomites 52 nitrogen deposition 52 flood basalts 52 ilmenites 52 Geologic mapping 52 felsic intrusions 52 Cenozoic 52 martian rocks 52 hydrothermally 52 Sedimentary rocks 52 retreating glaciers 52 Lophelia 52 foraminifera 52 gabbros 52 Raman spectra 52 calcite 52 upland forests 51 sulfide deposits 51 basal till 51 Early Cretaceous 51 surface geochemistry 51 volcaniclastics 51 sulfate minerals 51 mineralized outcrops 51 biogeochemical processes 51 Sediment cores 51 carbonaceous shales 51 relative abundances 51 landform 51 hominid fossils 51 Outcrops 51 arsenic anomalies 51 shell middens 51 sulphide mineral 51 temperature reconstructions 51 outcrop sampling 51 carbonate minerals 51 hematite goethite 51 glacial melt 51 volcanism 51 mantle plumes 51 finely layered 51 Last Glacial Maximum 51 mineralized quartz veins 51 Late Ordovician 51 malachite azurite 51 olivine 51 Geological mapping 51 stalagmites 51 erosional 51 spatial scales 51 zircon crystals 51 glacial geology 51 tektites 51 Paleoclimate 51 carbonatite 51 sediment sampling 51 mantle convection 51 claystone 51 pyroclastics 51 magnetite alteration 51 carbonaceous 51 anamensis 51 NDVI 51 hydrothermally altered 51 disseminated sulphide mineralization 51 moraines 51 subglacial lake 51 subalpine 51 finely disseminated 51 glacial overburden 51 sedimentary strata 51 ancient lava flows 51 sedimentary rock 51 herbarium specimens 51 Carbonatite Complex 51 xenoliths 51 surface geochemical anomalies 51 microbialites 51 Torlon Hill 51 surface trenching 51 REE bearing 51 magmas 51 ultramafic rocks 51 crinoids 51 diabase 51 journal Geology 51 formation BIF 51 anomalous uranium 51 planktonic foraminifera 51 paleobiologists 51 arsenopyrite bearing 51 refugia 51 ancient supercontinent 51 hominid fossil 51 mud volcanoes 51 Cambrian Ordovician 51 Sulphide mineralization 51 bryozoans 51 isotope fractionation 51 igneous 51 supergene enriched 51 lithogeochemical 51 past boninite lavas 51 pyrite marcasite 51 diorite intrusive 51 magmatic 51 variably silicified 51 explosive volcanism 51 saprolitic 51 KT boundary 51 anticlines 51 coniferous forests 51 bonebed 51 radiocarbon measurements 51 permafrost 51 intensely oxidized 51 airborne radiometrics 51 bornite chalcopyrite 51 Sinus Meridiani 51 limonitic 51 volcanogenic 51 IP chargeability 51 HiRISE image 51 glacial sediments 51 ocean basins 51 uranium vanadium mineralization 51 geomorphological 51 mineralized breccias 51 Arabia Terra 51 biogeographic 51 magnetite skarn 51 deepwater corals 51 isotopic signatures 51 depositional environments 51 acid leached 51 alteration mineralogy 51 igneous rock 51 Boreal forests 51 ultramafic rock 50 tundra vegetation 50 petrographic analysis 50 Paleogene 50 permanently shadowed craters 50 geologically 50 geochemists 50 kimberlitic 50 lacustrine 50 epidote 50 Ediacara 50 Seagull Intrusion 50 atmospheric deposition 50 diamondiferous kimberlite pipes 50 Neolithic Age 50 anomalously warm 50 paleoecology 50 mineralized boulders 50 element osmium 50 Zalasiewicz 50 lithocap 50 Eemian 50 Service WGMS 50 radiometric anomalies 50 oxygen isotopic 50 temperate forests 50 geologically mapped 50 benthic foraminifera 50 Ediacaran 50 geochem 50 cryovolcanism 50 malachite mineralization 50 volcanic ridges 50 Sediment samples 50 Cenozoic Era 50 eskers 50 anomalous geochemical 50 basaltic 50 Holocene epoch 50 breccia pipes 50 alluvium 50 benthos 50 molybdenite mineralization 50 ecoregions 50 skarn alteration 50 magnetite bearing 50 alluvial workings 50 silicified breccia 50 volcanic stratigraphy 50 gabbroic 50 nitrogen isotopes 50 mantle xenoliths 50 microscopic fossils 50 Proterozoic age 50 volcaniclastic rocks 50 radiocarbon tests 50 fine grained sediments 50 Oligocene epoch 50 carbonatized 50 climate modellers 50 G# garnets 50 termite mound sampling 50 Syrtis Major 50 stratovolcano 50 drumlin 50 drumlins 50 craton 50 granitic pegmatite 50 carbonatite dykes 50 mineralized pegmatite 50 algal mats 50 surficial 50 stratigraphic sequence 50 limestones 50 Aram Chaos 50 phreatic 50 volcanic tuff 50 Middle Paleolithic 50 sulphide minerals 50 geological strata 50 diamondiferous gravels 50 abyssal plain 50 oxygen isotopic composition 50 chrysocolla 50 ground truthing 50 dacitic 50 mineral olivine 50 Molybdenite 50 sylvinite 50 tuffs 50 liverworts 50 faunas 50 kimberlite breccia 50 Vatnajökull 50 orogenic 50 Alaskite 50 rock outcrops 50 geological geochemical geophysical 50 copper skarn 50 airborne radiometric anomalies 50 graben 50 element geochemistry 50 sedex 50 airborne magnetic 50 atmospheric aerosols 50 Medieval Warm Period 50 Porites 50 Cretaceous sediments 50 anomalism 50 interannual variability 50 Paisley Caves 50 placer deposits 50 Ileret 50 alluvial plains 50 basalt flows 50 overlying layers 50 potassium feldspar 50 volcanic caldera 50 Brigham Grette 50 paleontological 50 carbonaceous chondrites 50 uraninite 50 continental crust 50 chargeability highs 50 placer workings 50 serpentinized 50 quartz alunite 50 diatom 50 kaolinite 50 phosphorus concentrations 50 gravity anomalies 50 chlorite altered 50 lithosphere 50 Mg Ca 50 advanced argillic alteration 50 Martian rocks 50 carbonate globules 50 crustal movements 50 Tharsis Rise 50 gabbro intrusive 50 anomalous concentrations 50 magma chambers 50 Geochemical analyzes 50 silicate mineral 50 silicified limestone 50 granites 50 Late Devonian 50 Noachian 50 stockwork veins 50 Phanerozoic 50 Quaternary 50 WNW trending 50 fossilized skulls 50 Fe Mn 50 stony meteorites 50 Paleozoic carbonate 50 paleo 50 Alpine glaciers 50 allanite 50 alaskites 50 Cuddie Springs 50 preserved fossils 50 karst terrain 50 meta sedimentary rocks 50 Schladow 50 chalcopyrite bornite 50 carbon dioxide concentrations 50 Landsat imagery 50 goethite 50 metavolcanics 50 chalcedonic 50 granitic rock 50 altered andesitic 49 HiRISE images 49 Tertiary volcanics 49 plagioclase 49 gneisses 49 elemental composition 49 tectonic plate movements 49 apatite 49 subsurface geology 49 meta sediments 49 hornfels 49 hydrologic cycle 49 Massive Sulfide 49 carbonate veins 49 dolomitic 49 heavily cratered 49 Pleistocene Ice Age 49 supergene 49 anomaly coincident 49 siderite 49 carbonatites 49 rhyolite domes 49 fine grained sandstone 49 Isua 49 Athabasca sandstone 49 Middle Eocene 49 CAIs 49 seafloors 49 mafic rocks 49 hydrothermal alteration 49 Paleocene Eocene Thermal Maximum 49 crustal 49 radiogenic 49 Kilimanjaro glaciers 49 polymetalic 49 Arctic permafrost 49 phlogopite 49 glacial interglacial 49 Petrology 49 copper anomalism 49 chondritic 49 outcrop exposures 49 pathfinder elements 49 archeologically 49 outcrop 49 geology hydrology 49 limber pine 49 Earths crust 49 lamproite 49 permafrost soils 49 sedimentary sequence 49 Ordovician 49 Sian Praso 49 Tertiary volcanic 49 quartz biotite 49 mineralized mantos 49 pyroxene 49 polymetallic mineralization 49 Allende meteorite 49 illite 49 deep convective clouds 49 mid latitudes 49 coprolites 49 termite mounds 49 alluvial soils 49 single celled algae 49 bearing kimberlite 49 snail shells 49 Darnley Bay gravity 49 MMI soil geochemical 49 Chalcopyrite 49 alkalic 49 C4 grasses 49 vanadium mineralization 49 sulfide bearing 49 Noachian era 49 dacite 49 porphyritic intrusions 49 anomalous molybdenum 49 gravels 49 tonalite 49 Snowball Earth 49 surface hoar 49 orogenic gold deposits 49 Balarat Project 49 felsic volcanic rocks 49 alteration halos 49 metamorphism 49 subseafloor 49 quartz feldspar porphyry intrusive 49 evaporites 49 Nunavut Territory coal 49 sheared mafic 49 hematite mineral 49 Soil geochemistry 49 skarn mineralization 49 alluvial gravels 49 δ 49 mineralized shears 49 montane 49 Paleocene 49 Precambrian 49 Geochemistry 49 silica breccias 49 terminal moraine 49 Anomalous radioactivity 49 IR spectra 49 stockwork breccia 49 ankerite 49 brittle deformation 49 fluvial 49 peridotite 49 angiosperms 49 conductivity anomalies 49 Hadean 49 andesitic flows 49 ophiolitic 49 uraniferous 49 Nature Geosciences 49 Karoo sediments 49 Detailed geologic mapping 49 carboniferous 49 lapilli tuff 49 rhyolite tuffs 49 refrozen ice 49 acid sulphate alteration 49 bastnasite 49 vein quartz 49 Cryogenian period 49 greywackes 49 fluorite mineralization 49 potsherds 49 interglacials 49 earliest hominid 49 terrane 49 microdiamond analysis 49 radiometric surveys 49 soil geochemistry 49 garimpeiro workings 49 Permian Triassic 49 mountain glaciers 49 metamorphic rock 49 Berkeley Geochronology Center 49 diamondiferous 49 Kambalda style 49 Antarctica EPICA 49 chert 49 embayment 49 manganese oxides 49 alunite 49 Paleozoic sediments 49 cobalt mineralization 49 AHGZ 49 spodumene rich 49 stream sediment geochemistry 49 scheelite bearing 49 mudstone 49 Paleocene Eocene 49 active volcanism 49 bryophytes 49 mineral assemblages 49 atmospheric CO2 levels 49 Upper Triassic 49 soil geochemical surveys 49 nebular 49 airborne radiometric survey 49 Maunder minimum 49 chondrules 49 Antarctic Dry Valleys 49 Paleozoic sedimentary 49 evaporite minerals 49 acidic soils 49 magnetic anomalies 49 altered felsic 49 nitrogen isotope 49 Detailed mapping 49 evaporite deposits 49 Proterozoic basement 49 colluvium 49 potassium thorium 49 diatoms 49 gold geochemical anomalies 49 geochemical anomalies 49 pyroxenites 49 Quaternary Period 49 gossans 49 Anomalous gold 49 felsic intrusive rocks 49 Dikika 49 VTEM conductor 49 Chert 49 ophiolite 49 silicate minerals 49 Radiometric 49 greenstones 49 felsic intrusive 49 biota 49 granitoids 49 intrusives 49 carbonate rocks 49 IP geophysical anomalies 49 litho geochemical 49 Carboniferous Period 49 Jurassic Cretaceous 49 sulphidation epithermal 49 plankton blooms 49 chondrites 49 airborne geophysical anomalies 48 semidesert 48 geology 48 biotite 48 biogeographical 48 interglacial 48 spinels 48 silica alteration 48 epidote alteration 48 paleochannels 48 Eocene 48 Paleozoic Era 48 eclogitic 48 icesheets 48 mudstones 48 Ikungu 48 radiometric 48 Detailed geological mapping 48 geochemical surveying 48 vertebrate fossil 48 porphyry copper mineralization 48 Geochemical 48 comet nuclei 48 basaltic lava 48 alpine glaciers 48 sulphide bearing 48 vuggy silica 48 mineralogical composition 48 ignimbrite 48 shrublands 48 Permo Triassic 48 #ppb [002] 48 elemental abundances 48 lunar soil 48 iron carbonate 48 Tibetan Plateau 48 Airborne geophysics 48 shadowed craters 48 massifs 48 kimberlitic indicator minerals 48 airborne geophysical 48 liverwort 48 glacial melting 48 geochemical assay 48 facies 48 haematite 48 pegmatite dykes 48 Jurassic limestone 48 stockworked 48 subsurface ocean 48 Precambrian rocks 48 Banded Iron Formation 48 geochemical surveys 48 volcanic sediments 48 granite gneiss 48 lava tubes 48 glacial ice 48 Gondwanan 48 diamondiferous kimberlite 48 sylvite 48 deformational 48 Late Cretaceous 48 volcanic lava 48 granitic rocks 48 coprolite 48 molecular phylogenetic 48 subcrop 48 lichens mosses 48 quartz carbonate vein 48 oxidized iron 48 hydrological cycle 48 ejecta blanket 48 tropical troposphere 48 Geologically 48 Cretaceous sandstones 48 Triassic Jurassic 48 streambanks 48 Harvati 48 surface temperatures SSTs 48 lithological units 48 amphibole 48 aeromagnetics 48 biotopes 48 kimberlitic bodies 48 mineral zonation 48 calcrete 48 tectonic movements 48 Neanderthal bones 48 mineralizing system 48 Meridiani 48 geochemically anomalous 48 SST anomalies 48 zonation 48 Carboniferous 48 surface geochemical sampling 48 tetrapods evolved 48 Arsenopyrite 48 syenite intrusive 48 Amazonian forest 48 lithology 48 porphyry intrusives 48 outwash 48 altered granodiorite 48 bristlecone pines 48 solar irradiance 48 electromagnetic anomalies 48 meteorite bombardment 48 phylogeographic 48 pyrite veins 48 alaskite 48 enzyme leach 48 rock geochemistry 48 auriferous 48 felsic volcanic 48 mildly alkaline 48 mid Pliocene 48 hydrothermal fluid 48 floras 48 decadal 48 garimpos 48 shadowy craters 48 spherules 48 massive sulphide deposits 48 ecoregion 48 calderas 48 coniferous forest 48 diatremes 48 geochemical assays 48 carbonaceous mudstone 48 Gohar Tepe 48 asthenosphere 48 graphitic conductors 48 Younger Dryas 48 Candor Chasma 48 Aurignacian 48 geologic mapping 48 siliceous 48 cosmic ray intensity 48 lithium tantalum 48 overlying sandstone 48 basaltic magma 48 geophysics trenching 48 Eocene Epoch 48 geothermal gradient 48 chloritic 48 chemosynthetic 48 kimberlite float 48 massive sulfide mineralization 48 Afar desert 48 aluminous 48 yardangs 48 mafic intrusions 48 hydrothermal venting 48 mineral occurrences 48 gabbro dykes 48 stratigraphic horizons 48 sulphides 48 isotope geochemistry 48 carbon fluxes 48 mangrove vegetation 48 IP induced polarization 48 metasediment 48 Cauchari Olaroz 48 atmospheric oceanic 48 sulfate concentrations 48 biotite rich 48 eruptive activity 48 Ni Cu mineralization 48 mafic intrusive 48 chlorine monoxide 48 pathfinder element 48 leached capping 48 glaciological 48 volcaniclastic 48 alluvial gravel