Related by context. Frequent words. (Click for all words.) 60 sediment samples 59 Soil samples 58 sediment cores 57 sediments 55 marine sediments 54 sediment sampling 54 Sediments 53 microfossils 52 sediment 52 Lake Vostok 52 subsurface 51 lake sediments 51 surface trenching 51 geologic 50 lava tubes 50 foraminifera 50 geological formations 50 geologic formations 50 radiometrics 50 reservoir 50 transect 49 biogeochemical 49 embayment 49 igneous rocks 49 Anomalous gold 49 sandstone reservoir 49 radiometric surveys 49 hydrothermal vent 49 airborne magnetic survey 49 Geochemical 49 drainage basins 49 hydrogeologic 49 soil geochemical surveys 49 lakebed 48 Grab samples 48 placer deposits 48 magnetometer survey 48 auger drill 48 Geological mapping 48 rock outcrop 48 seafloor 48 alluvial deposits 48 basin 48 bathymetry 48 soil geochemical sampling 48 mud volcanoes 48 Soil sampling 48 geochemically anomalous 48 sandstone formations 47 glacial till 47 cenote 47 soil geochemical survey 47 breccia pipes 47 erosional 47 fluvial 47 aeromagnetic data 47 Reverse circulation 47 limestone caves 47 geologically 47 rock outcrops 47 outcrops 47 mudflat 47 Surface sampling 47 porosities 47 Paleocene 47 electromagnetic surveys 47 inter tidal 47 geologic formation 47 ppm U 47 isotope ratios 47 geological 47 EM anomalies 47 shallow aquifer 47 granitic rocks 46 spatial scales 46 bathymetric 46 groundwater aquifers 46 wireline logs 46 volcanic vent 46 magma chamber 46 sedimentary rock 46 previously undrilled 46 geochemical 46 seabeds 46 Preliminary metallurgical 46 conductive zones 46 scintillometer 46 ground truthing 46 aircore drilling 46 wellbores 46 mudstone 46 geochemists 46 calcrete 46 streambeds 46 basins 46 tidal waters 46 lava tube 45 drill cuttings 45 Veta Madre 45 lunar soil 45 airborne radiometric