Related by context. All words. (Click for frequent words.) 67 Carboniferous Period 64 cretaceous 64 Carboniferous 62 Neogene 60 Neoproterozoic 60 paleochannels 60 Paleocene 60 cratons 60 sedimentary layers 59 anhydrite 59 evaporite 59 sedimentary deposits 59 Pleistocene Age 59 volcanic lava 59 Cenozoic Era 58 Late Cretaceous 58 lacustrine 58 economically extractable 58 igneous intrusions 58 palaeo 58 Plio Pleistocene 58 ferruginous 58 Archaean 58 rubbly 58 Late Miocene 58 semidesert 58 depositional environment 57 trilobite fossils 57 anorthosite 57 Cambrian Ordovician 57 Cenomanian 57 claystone 57 Ediacara 57 abyssal plain 57 detrital 57 coralline 57 hydrated silica 57 paleochannel 57 porous sandstone 57 Precambrian 57 tuffaceous rocks 57 lateritic 56 colluvial 56 Geologically speaking 56 alluvial plains 56 Early Cretaceous 56 stromatolites 56 palaeolithic 56 orogenic 56 Middle Devonian 56 Lower Cretaceous 56 Pliocene 56 Upper Carboniferous 56 Cretaceous 56 unsampled 56 Paleogene 56 bony fishes 56 Permian Period 56 geological strata 56 Eocene 56 Lengai 56 lain undisturbed 56 shell midden 56 speleothems 56 sediments deposited 56 layered ultramafic 56 Jurassic Period 55 Devonian Period 55 amphibolite facies 55 sedex 55 metamorphic rock 55 Panderichthys 55 seafloor sediments 55 Sarmatian 55 phyllosilicate 55 silicate rocks 55 coral skeletons 55 Paleozoic sediments 55 karst limestone 55 Messinian 55 Silurian 55 dolostone 55 stromatolite 55 planktonic foraminifera 55 Gneiss 55 dolomites 55 Paleozoic era 55 granite gneiss 55 granitoids 55 outwash 55 sulfide deposits 55 Permo Triassic 55 earths crust 55 Lophelia 55 pediment gravels 55 depositional 55 flood basalts 55 Witwatersrand basin 55 basaltic rocks 55 Late Devonian 55 Upper Miocene 55 Burgess Shale 55 Mesolithic 55 marine sediments 55 Cambrian Period 55 Iguanodon 55 carbonate sediments 55 windblown sand 55 Mesozoic era 55 pillow basalts 54 Ediacaran 54 Late Paleozoic 54 dolomitic 54 igneous rock 54 alluvial gravel 54 isotopic compositions 54 sulfidic 54 stratified layers 54 Palaeolithic 54 earliest hominid 54 subaqueous 54 Karoo sediments 54 ancient supercontinent 54 craton 54 volcanic basalt 54 Late Jurassic 54 Jurassic limestone 54 tailing piles 54 Cenozoic era 54 granitic rock 54 mudstones 54 phreatic 54 fossilisation 54 Cretaceous Jurassic 54 Eocene Epoch 54 hematite goethite 54 coccolithophores 54 eclogite 54 microfossils 54 Navajo Sandstone 54 Paleozoic Era 54 chemosynthetic 54 midden 54 foreland 54 crinoids 54 Middle Paleolithic 54 chalcedonic silica 54 Campanian 54 sulphidic 54 alluvial flats 54 Gobero 54 lobe finned fish 54 hummocks 54 Palaeozoic 53 calcic 53 Laramidia 53 unmineable 53 bonebed 53 unsurveyed 53 swampy lowlands 53 Paleozoic carbonate 53 Nordegg Member 53 Cretaceous sediments 53 colliding tectonic plates 53 halite 53 isotope composition 53 coquina rock 53 glacial outwash 53 lavas 53 ferric oxides 53 Ordovician 53 erosional 53 Jurassic Triassic 53 Leduc Formation 53 Monks Mound 53 diabase dike 53 diamondiferous kimberlite pipes 53 ammonite 53 ophiolite 53 carbonaceous shales 53 Rancho La Brea 53 Oligocene epoch 53 iron sulphides 53 Navajo sandstone 53 hydrothermal vent 53 loess 53 Noachian era 53 middens 53 conodonts 53 saprolitic 53 palaeo channel 53 alluvial soils 53 alluvial gravels 53 bauxites 53 glacial moraine 53 terra preta 53 volcano sedimentary sequences 53 Indus civilization 53 clay loam 53 Proterozoic sediments 53 Aptian 53 geochronology 53 Devonian 53 coprolite 53 alluvial plain 53 anticlines 53 basalt rock 53 magmatism 53 overthrust 53 carbon isotopes 53 massifs 53 Jurassic sandstone 53 tarlike 53 rifted 53 pillow lavas 53 Alaskite 53 sedimentary sequences 53 quartz pebbles 53 Hassaï 53 subterranean caves 53 WNW trending 53 supergene mineralization 53 peaty soil 53 tumulus 53 infertile soils 53 Dargues 53 glauconite 52 gasometers 52 Berea sandstone 52 glaciers melted 52 kyanite 52 abyssal 52 Hadean 52 fossils unearthed 52 manganese nodules 52 turbidite 52 tectonic plate movements 52 Namib Desert 52 seabed sediments 52 Isua 52 forams 52 Lower Jurassic 52 basalt flows 52 microfossil 52 lamproite 52 basalt rocks 52 eolian 52 Pleistocene epoch 52 Triassic Jurassic 52 glaciers retreated 52 Cretaceous Period 52 carbonaceous material 52 alluvial deposits 52 ultramafic intrusives 52 Maastrichtian 52 sandstone 52 Permian extinction 52 Balarat Project 52 palaeontological 52 disseminated sulfide 52 savannah grasslands 52 ironstone 52 placer workings 52 mineral hematite 52 komatiite 52 peridotites 52 Appy Sluijs 52 limestone quarries 52 basalt volcanic 52 alluvial tin 52 dense woodlands 52 leached capping 52 igneous intrusion 52 Miocene epoch 52 Oligocene reservoir 52 pyrites 52 tectonically 52 dolmen 52 iridium layer 52 Triassic Period 52 sediments 52 sedimentary strata 52 mammal fossils 52 Palaeozoic sedimentary 52 Late Cretaceous Period 52 uranium ores 52 slag heaps 52 Doushantuo Formation 52 Noachian 52 colliery spoil 52 serpentinite 52 ammonites 52 Seagull Intrusion 52 Late Triassic 52 3m #ft 52 Preseli Hills 52 Orogeny 52 Early Archaic 52 lobe finned fishes 52 paleo placer 52 thermally mature 52 ostracods 52 shallower Cretaceous 52 Leda clay 52 geophysically 52 shell middens 52 inter tidal 52 brachiopods 52 coniferous forest 52 cinder cones 52 dolerite 52 Middle Jurassic 52 strontium isotope 52 #.#m 8ft 52 oxidized ore 52 radioactive nuclei 52 fine grained sandstone 51 colluvium 51 continental crust 51 tufa 51 photosynthesising 51 Tertiary Period 51 basaltic 51 sedimentary rock 51 magmas 51 Pleistocene Epoch 51 quartz boulders 51 Ediacaran Period 51 ochres 51 lunar crust 51 limestone caverns 51 iron smelting 51 Laurasia 51 radiocarbon dates 51 Incan Empire 51 paleomagnetic 51 sulpher 51 Jurassic formations 51 Turonian 51 impermeable shale 51 multi celled 51 Syrtis Major 51 alluvial workings 51 Gondwanaland 51 limestone grassland 51 pine timbers 51 Middle Miocene 51 overlying sedimentary 51 tailings piles 51 carbonatite dykes 51 desiccating 51 Middle Pleistocene 51 Sakoa 51 prehistoric cave 51 Phanerozoic 51 barren expanse 51 saline aquifers 51 ramidus 51 volcano sedimentary sequence 51 hydrothermally 51 metalliferous 51 Upper Paleolithic 51 Mistaken Point 51 Sedimentary rocks 51 glaciers receded 51 Upper Cretaceous 51 Upper Jurassic 51 shallow overburden 51 coarser grained 51 sulphide deposits 51 ancient lava flows 51 neolithic 51 volcanic caldera 51 Fossae 51 silicate mantle 51 smoker vents 51 silicate minerals 51 Dig unearths 51 embayment 51 nephrite 51 Neolithic Period 51 lime kilns 51 clayey 51 olivine rich 51 limestone outcrops 51 granitoid hosted 51 supercontinent Gondwana 51 zinc sulphide 51 Soumber 51 relict 51 castellated 51 asthenosphere 51 fertile lowlands 51 Olmec culture 51 bacterial mats 51 Upper Triassic 51 Mesozoic 51 silicate mineral 51 plagioclase 51 Incans 51 quartz grains 51 Merensky Reef 51 peridotitic 51 yellow ocher 51 photic zone 51 Pre Cambrian 51 ductile deformation 51 overlying sandstone 51 lithic 51 turbidites 50 ceramic shards 50 ounces Moz. 50 Pleistocene Ice Age 50 calcareous sediments 50 Yixian Formation 50 specular hematite 50 Sphagnum 50 sulfate minerals 50 mineable ore 50 Sand dunes 50 biotite rich 50 element boron 50 substrata 50 Sterkfontein caves 50 filamentous algae 50 basalt cliffs 50 ferrous oxide 50 humans Homo sapiens 50 siderite 50 Saharan Desert 50 B Chromitite 50 magnetite gneiss 50 cenospheres 50 Copperstone Fault 50 hyena dung 50 Ordovician limestone 50 bearing stratigraphy 50 quartz alunite 50 supergene enriched 50 copper sulphide 50 gabbros 50 fossil 50 unobtanium 50 Miocene Epoch 50 siliciclastic 50 andesitic rocks 50 Peat bogs 50 calcareous 50 stony meteorites 50 greenstones 50 faunas 50 vertebrate fossils 50 moraines 50 paleoenvironmental 50 baobabs 50 Riversleigh 50 cypress pine 50 sandstone quarry 50 Jurassic sandstones 50 faunal 50 lowermost mantle 50 acid leached 50 volcanoclastic rocks 50 carbonate reservoir 50 hummocky 50 porous limestone 50 fine grained sediment 50 sparsely vegetated 50 montane forest 50 deoxygenated 50 silicic 50 icescape 50 spinifex 50 Arabian deserts 50 Archaeologists uncover 50 eluvial 50 chondritic 50 Late Ordovician 50 horst block 50 surficial 50 Dilmun civilization 50 gabbro dykes 50 palaeochannels 50 carbonate rocks 50 Triassic 50 siliceous sediments 50 alluvial soil 50 phosphorite 50 manto mineralization 50 petroglyphs carved 50 argillaceous 50 crinoid 50 carbonised 50 silicified andesite 50 micaceous 50 oceanic crust 50 sandy loams 50 radiocarbon dated 50 bituminous thermal 50 weathered kimberlite 50 ignimbrites 50 mica schist 50 mallee fowl 50 peat soils 50 Jurassic 50 macrofauna 50 rusticles 50 Palaeocene 50 granite outcroppings 50 arid highlands 50 saltpans 50 oligotrophic 50 pyrrhotite mineralization 50 granitic basement 50 fossilized shells 50 sedimented 50 Oligocene 50 Middle Palaeolithic 50 Ares Vallis 50 garnet skarn 50 Miocene reservoirs 50 felsic tuff 50 Mesoproterozoic 50 solar evaporation ponds 50 carbonate formations 50 geological stratum 50 dense clumps 50 zircon crystals 50 Usambara Mountains 50 Chacoan 50 sauropod dinosaur 50 electrum 50 Middle Awash 50 Cretaceous periods 50 lunar highlands 50 abyssal plains 50 supergene copper 50 fossils 50 andesite flows 50 carbonaceous shale 50 mineralized mantos 49 Rotliegend sandstone 49 Bronze Age burial 49 flint artifacts 49 Fossilised 49 bituminous coals 49 Zechstein 49 Triassic formations 49 trilobites 49 karstic 49 nickel laterites 49 lithium bearing pegmatite 49 Acheulian 49 downwelling 49 un oxidized 49 metamorphic rocks 49 gracile 49 sandstone buttes 49 subseafloor 49 silts 49 karsts 49 secondary chalcocite 49 unfished 49 diamond bearing gravels 49 siliceous breccia 49 angiosperm 49 faulted anticline 49 Gondwanan 49 graben 49 Creswell Crags 49 kimberlite breccia 49 Paleoproterozoic 49 treeless landscape 49 goethite hematite 49 goethite 49 Inca civilization 49 Chert 49 tableland 49 manganese mineralization 49 polar icecap 49 gabbroic 49 Birimian Greenstone Belt 49 lineaments 49 stalactite 49 microbial mats 49 finely disseminated 49 Late Archaic 49 diorite dyke 49 mastodon tusk 49 chalk grassland 49 Karakum desert 49 Floridian aquifer 49 economically exploitable 49 altered andesitic 49 Lake Iliamna 49 haematite 49 Geologically 49 xenoliths 49 andesitic volcanic rocks 49 drumlins 49 #km ² [002] 49 Ca2 49 Halil Rud 49 sandstone formations 49 steppe bison 49 fossilization 49 Cretaceous sedimentary rocks 49 basaltic rock 49 Paleozoic 49 Precambrian rocks 49 Maluti Mountains 49 KT boundary 49 basalts 49 Toba eruption 49 metamorphism 49 felsic intrusions 49 Qawasim 49 granitoid rocks 49 Neolithic Age 49 Argentinosaurus 49 volcanic cinders 49 mudstone 49 volcanogenic 49 branching corals 49 exhalite 49 #km ² [001] 49 Kali Kuning 49 henges 49 talus slopes 49 Sassanid era 49 Proterozoic 49 Archeologists unearth 49 Blombos Cave 49 depositional environments 49 diatom species 49 basalt 49 Junggar Basin 49 bacterial decomposition 49 Ordovician Silurian 49 mineral olivine 49 Petrified wood 49 azurite 49 hydrothermal fluids 49 Norte Chico 49 rhyolite tuff 49 southern supercontinent 49 fossilized creatures 49 lake sediments 49 lapilli 49 Oxyrhynchus 49 slate quarries 49 overlying sediments 49 sedimentary layer 49 Miocene reservoir 49 limestones 49 Methane hydrate 49 glacial geology 49 alluvium 49 pebble dash 49 Miocene Pliocene 49 sequestering CO2 49 Banded Iron Formation 49 Andean Cordillera 49 fossilized coral 49 megadroughts 49 sedimentary formations 49 abiotic 49 saxifrage 49 ancestral Puebloan 49 brittle deformation 49 fossilized pollen 49 chromitite 49 disused mines 49 concretion 49 satanic mills 49 intensely oxidized 49 igneous rocks 49 upland forests 49 tailings dumps 49 ophiolitic 49 overlying layers 49 Bonanza Trench 49 limestone 49 hornblende 49 VTEM conductor 49 rhyolites 49 metal zonation 49 glacial boulder 49 sulfide bearing 49 recolonised 49 itabirite 49 Jaekelopterus 49 granite quarries 49 ironsand 49 treeless tundra 49 limestone cliff 49 Caloris Basin 49 spruce fir forest 49 iron sulphate 49 volcanic lava flows 49 pyrite stringers 49 volcanic pumice 49 Miocene sands 49 Mersey Estuary 49 Laterite 49 volcaniclastic rocks 49 mineralized skarn 49 phlogopite 49 esker 49 volcanic sediments 49 sulphide mineral 49 mantle convection 49 culm 49 stratigraphic sequence 49 lunar magma 49 chalcedony 49 supercontinents 49 preserved fossils 49 BIFs 49 Mousterian 49 sedimentological 49 relicts 49 Gohar Tepe 49 mafic intrusive rocks 49 windswept dunes 49 shallowly buried 49 Earths crust 49 chalk downland 49 hydrocarbon reservoirs 49 Tertiary sediments 49 Paleozoic sedimentary 48 Sorowar 48 gravels 48 amphibolites 48 Coelacanth 48 granite bedrock 48 volcanic tuffs 48 silicified zone 48 oak timbers 48 rockfill 48 placer deposits 48 moated 48 Archaeologists unearth 48 calcite crystals 48 vuggy silica breccias 48 accretionary 48 blanket bog 48 quartz sulphide vein 48 clastic sedimentary rocks 48 Laurentide ice sheet 48 escarpments 48 retreating glacier 48 mineralized diorite 48 argentiferous galena 48 Wollaston Domain 48 mudflat 48 clastic sediments 48 hyper saline 48 limestone dolomite 48 enargite 48 hydrothermal fluid 48 magnetite bearing 48 iron sulfide 48 Ancestral Puebloans 48 clasts 48 granodiorite porphyry 48 ignimbrite 48 rusted hulks 48 hematite stained 48 dunite 48 kimberlitic material 48 temperate forests 48 lobate 48 volcanic tuff 48 Jurassic Cretaceous 48 Mongol empire 48 Triassic sediments 48 Rano Raraku 48 Cryogenian 48 stockwork breccia 48 intensively cultivated 48 exhalative 48 pelite 48 Salar de Atacama 48 Konar Sandal 48 quartzites 48 Kostenki 48 Ancient civilizations 48 pelites 48 isotopic signature 48 rocky crevices 48 lava tubes 48 potassium thorium 48 stratigraphically below 48 carbon isotope ratios 48 Acanthostega 48 nepheline 48 herbivorous dinosaurs 48 kerogen 48 granitic gneiss 48 boreal regions 48 pallasite 48 copper nickel sulphide 48 Ordovician extinction 48 laterites 48 fossilized bone 48 isotopic composition 48 magmatic hydrothermal 48 geothermal gradient 48 bird Archaeopteryx 48 snail shells 48 paleoecology 48 Proterozoic basement 48 chthonic 48 Laetoli 48 Athabasca sandstone 48 mineralized mafic 48 dense rainforests 48 Mehrgarh 48 brownish haze 48 Hache lens 48 limestone bedrock 48 Djambaye II 48 ironsands 48 mammal lineages 48 uncultivated arable land 48 Fe Mn 48 Afar desert 48 broch 48 hominid fossils 48 limestone outcroppings 48 arable farmland 48 barrens 48 silty limestone 48 Olmecs 48 mylonite 48 #ft #m [001] 48 geological formations 48 moorlands 48 tadpole shaped 48 basalt lava 48 pegmatitic 48 matrix porosity 48 layered sedimentary rock 48 Caballos Formation 48 feldspars 48 Sialk 48 basalt boulders 48 preindustrial 48 hydrothermal magnetite 48 magmatic sulphide 48 arenite 48 greisen 48 garimpos 48 ultramafic rock 48 terrane 48 Cretaceous Tertiary boundary 48 sandstone mesa 48 terminal moraine 48 tectonic uplift 48 serpentinized 48 isotopic ratios 48 Genyornis 48 mineralized alteration 48 tuffaceous sediments 48 Early Bronze Age 48 columbite 48 VY Canis Majoris 48 crustal rocks 48 mineralized breccias 48 Lake Vostok 48 volcanic craters 48 iron pyrite 48 Aurignacian 48 unweathered 48 melting polar icecaps 48 Nasca Lines 48 tumuli 48 tetrapods evolved 48 prehistoric monuments 48 Laurentide Ice Sheet 48 whaleback 48 belowground 48 lithium bearing brines 48 icefields 48 prehistoric archaeological 48 coral encrusted 48 Animas vein 48 Chilcotin Plateau 48 Proterozoic rocks 48 fossilized skull 48 pitheads 48 grassy plains 48 geothermally 48 chalky soil 48 massive sulphide deposit 48 anerobic 48 Quaternary 48 glacial moraines 48 long necked sauropod 48 Upper Mannville 48 Hostmen 48 hypogene 48 gypsum crystals 48 alaskitic 48 archaeologists unearthed 48 Salinas Grandes 48 Icadyptes 48 Main Lode 48 isotope fractionation 48 Plesiosaurs 48 deglaciation 48 Pleistocene 48 igneous 48 lakebed sediments 48 ejecta blanket 48 locally quarried 48 magnetite ilmenite mineralization 48 prehistoric 48 Paleo Indian 48 sandstone boulders 48 carbonaceous 48 decaying vegetation 48 Tunguska meteorite 48 sulphides pyrite 48 Chalcolithic 48 El Tajo 48 argentiferous 48 epithermal deposits 48 Pollen grains 48 stibnite 48 clay subsoil 48 beech forests 48 pyrite halo 48 Indricotherium 48 stone cairns 48 crestal 48 Prairie Evaporite Formation 48 karst topography 48 geologically 48 cinder cone 48 altered ultramafic 48 Mapusaurus roseae 48 bristlecone pine 48 ocher 48 salt crystals 48 recrystallized 48 copper skarn 48 drumlin 48 overburden thickness 48 igneous intrusive 48 mammoths roamed 48 zinc sulfide 48 Cretaceous Tertiary 48 volcanic ridge 48 locally graphitic 48 radioactive thorium 48 gravel quarries 48 McMurdo Dry Valleys 48 Malartic mine 48 polymetallic veins 48 eucalypt forests 48 Cenozoic 48 lunar meteorites 48 thermal vents 48 Cretaceous limestone 48 fossilized dung 48 mantled 48 silicified limestone 48 Chalcopyrite 47 manganese oxides 47 Permian Triassic 47 Kushite 47 Goldbanks 47 oxygen isotope ratios 47 absorbs CO2 47 bauxite deposits 47 eclogitic 47 carbonate minerals 47 alluvial sediments 47 olivine crystals 47 treeless plains 47 copper cobalt gold 47 conifer forests 47 aridity 47 Kambalda Dome 47 Maiacetus 47 tectonic stresses 47 hominin species 47 Nectocaris 47 Dimetrodon 47 lithium boron 47 supergene enrichment 47 orogenic gold deposits 47 tonalite 47 photosynthetically 47 Middle Eocene 47 biogenic 47 siliceous