Related by context. Frequent words. (Click for all words.) 49 sq.km 48 placer deposits 48 sq.km. 47 sedimentary basins 46 deltaic 46 sq. kms 46 alluvial deposits 46 #km# [004] 45 river deltas 45 subcrop 44 sqkm 44 basins 44 rivers 44 Georgina Basin 44 salars 43 loess 43 groundwater aquifers 42 Cooper Eromanga Basin 42 basin 42 river valleys 42 sq km 41 reservoirs 41 #km# [002] 41 Thelon Basin 41 transects 41 alluvium 41 #sq km [003] 40 Gippsland Basin 40 silts 40 #sq km [001] 40 glacial lakes 40 areal extent 40 sq kms 40 coalbed methane wells 40 irrigated agriculture 39 sandstone formations 39 Paradox Basin 39 river basins 39 OOIP 39 Aquifers 39 porphyry deposits 39 porosities 39 irrigated farmland 39 headwater 39 geologic formations 39 sedimentary basin 39 gravity anomalies 39 km ² 39 magnetite mineralization 38 river basin 38 Outcrop 38 hydro electric dams 38 arid regions 38 ponds 38 geological formations 38 radiometric surveys 38 3D Seismic 37 gasfields 37 Lower Cretaceous 37 stream sediment 37 glacial till 37 graben 37 porphyries 37 diatomite 37 reservoir 37 2D seismic survey 37 gravels 37 anomalism 37 Basins 37 Marmaton 37 depositional 37 Soil sampling 37 Barnett Shale formation 37 coalbed methane CBM 37 wetland ecosystems 37 carbonate reservoirs 37 lakes 36 sq. km 36 greenstone belts 36 relict 36 Tuvatu 36 soil geochemical survey 36 surface trenching 36 basalts 36 Geological mapping 36 drainages 36 deepwater discoveries 36 groundwater recharge 36 km2 36 Topographic 36 Exploration License 36 CBM wells 36 evaporation ponds 36 NE trending 36 coulees 36 samples assayed 36 mud volcanoes 36 navigable rivers 36 gossans 36 Sediments 36 hydrological