Related by context. Frequent words. (Click for all words.) 56 porous limestone 54 erosional 54 hydrothermal fluids 54 andesitic 54 embayment 54 magma chamber 53 shallow aquifer 52 subglacial 52 basalt rock 52 depositional 51 Aquifers 51 undrained 51 #,#-#,# ft. Loc 51 reservoir 51 coulees 50 tritiated water 50 Upper Jurassic 50 drainage basins 50 spalling 50 ponded 50 Seafloor 50 geologic formations 50 sedimentary layers 50 feedwater 50 sumps 50 hydrostatic pressure 49 igneous rock 49 sandstone formations 49 steep ravines 49 Horizontal drilling 49 sandstone reservoir 49 hydrogeologic 49 Hydrothermal 49 alpine tundra 49 tropopause 49 groundwater plume 49 subsurface 49 palaeochannel 49 basalt 49 steam vents 49 Sedimentation 49 overpressure 48 streambeds 48 sedimentary rock 48 slurry 48 pyroclastic 48 temperature gradient 48 biogeochemical 48 lava tubes 48 escarpments 48 fracturing fluids 48 Quartzite 48 unmineralized 48 silts 48 lateritic 48 polyethylene pipe 48 ridges 48 rhyolitic 48 geologic formation 48 microstructural 48 molten rocks 48 saline aquifers 48 loess 48 hydrocarbon reservoirs 48 volcanic lava 48 clastic 48 clasts 48 Hydrogen sulfide 48 breccia pipes 48 southeasterly direction 47 Seepage 47 clathrates 47 upslope 47 reactor coolant 47 sediment 47 groundwater aquifers 47 miscible 47 metasedimentary 47 rocky ledges 47 tonalite 47 Hole ZFDDH# 47 magnetic susceptibility 47 Leachate 47 graben 47 earthen berms 47 pier pilings 47 calcium oxide 47 microchannel 47 rheological 47 leachate collection 47 drainage culverts 47 penstocks 47 Footwall Zone 47 permeability 47 salt domes 47 settling ponds 47 ridge 47 fumaroles 47 clarifiers 47 dam spillway 47 surface geochemistry