Related by context. Frequent words. (Click for all words.) 68 marine sediments 67 depositional 67 geologic 67 lake sediments 66 glacial till 66 sediments 65 lavas 65 landforms 64 sedimentary rock 64 stromatolites 64 basalts 64 continental crust 63 graben 63 microfossils 63 alluvial deposits 63 crustal 62 Meridiani 62 geological 62 spherules 62 surficial 62 outcrops 61 oceanic crust 61 sedimentary 61 fluvial 61 foraminifera 61 mineralizing system 61 basaltic 61 geomorphology 61 alluvium 60 volcanism 60 sedimentary rocks 60 Paleocene 60 hydrothermal 60 sediment cores 60 Geologically 60 subsurface 60 kimberlitic 60 magmatic 60 gravity anomaly 60 geologically 59 lithosphere 59 olivine 59 geochemical 59 basalt 59 zircons 59 Quaternary 59 rock outcrops 59 igneous 59 skarn mineralization 59 geochemistry 59 magma chamber 59 magnetic anomalies 59 glaciation 59 Sediments 59 Lower Cretaceous 59 geological formations 59 sulfide mineralization 58 Carboniferous 58 peridotite 58 sediment 58 calcareous 58 mudstone 58 Ordovician 58 iron oxides 58 gravels 58 hematite 58 limestones 58 Eocene 58 calcite 58 radiometric anomaly 58 landform 58 sedimentary basins 58 rock outcrop 58 permafrost 57 facies 57 outcrop 57 geologic formation 57 ejecta 57 mineralogy 57 soils 57 granitic 57 breccia zone 57 lithology 57 Chicxulub 57 radiometric anomalies 57 ultramafic rocks 57 carbonaceous 57 sedimentary basin 57 Pliocene 57 areal extent 56 Geological mapping 56 lunar soil 56 lakebed 56 carbonatite 56 sediment samples 56 Burgess Shale 56 Precambrian 56 Geochemistry 56 terrestrial ecosystems 56 diamondiferous 56 mineralizing