Related by context. Frequent words. (Click for all words.) 50 creek bottoms 49 playa lakes 49 oxbows 49 vertical shafts 48 Paved roads 48 drainage basins 48 forested wetlands 48 sulfide minerals 47 impermeable surfaces 47 steep ravines 47 creek crossings 47 retaliatory kidnappings 47 tidal creeks 47 bridge abutments 47 riparian vegetation 47 limestone bedrock 47 recharge groundwater 46 refugia 46 Hiking trails 46 streambanks 46 roadbeds 46 streambank 46 lava tubes 46 crawlspaces 46 grassy meadows 46 cenotes 45 streambeds 45 bd.className + = 45 sinkholes 45 dentine 45 corrosive gases 45 belowground 45 By Laurie Kulikowski 45 riversides 45 gulleys 44 mineshafts 44 headwater streams 44 spalling 44 caves 44 creeks streams 44 microscopic pores 44 riparian zones 44 By JEFF BLAIR 44 adits 43 Odd numbered addresses 43 beaver ponds 43 navigable rivers 43 meteor impacts 43 diabase 43 intermittent streams 43 passageways 43 sediment buildup 43 wadis 43 embayments 43 halite 43 underground burrows 43 river bottoms 43 mine shafts 43 openings 43 beaver dams 43 methane crystals 43 Jharkhand Chhattisgarh 43 limestone caves 43 polar craters 43 parapet walls 42 cave ins 42 erosional 42 driveways sidewalks 42 waterfalls 42 habitats 42 primitive campsites 42 deciduous forests 42 dolerite 42 lakeshores 42 Vast stretches 42 inflowing 42 wetlands 42 coulees 42 tunnels 42 Norris Geyser Basin 42 marinas beaches 42 ponded 42 highly erodible 42 naturally occurring mineral 42 stormwater ponds 42 bioaccumulation 42 watersheds 42 basins 42 culverts 42 gulches 42 vegetations 42 Arunachal Pradesh Assam 42 waterholes 42 thawing permafrost 42 human habitations 42 wetland ecosystems 42 porous limestone 42 streambed 42 karst 42 overexploited mine 42 strangulation hazards