Related by context. Frequent words. (Click for all words.) 47 quarry 47 Comstock Lode 47 Book Cliffs 46 slag heap 46 buttes 45 underground cavern 45 limestone quarry 44 canyon 44 mesa 44 Geologically 44 igneous rock 44 rock quarry 43 Canyonlands National 43 escarpments 43 Superstition Mountains 43 sandstone cliffs 43 gulch 43 Hobet 43 waste repository 43 hoodoos 43 volcanic crater 42 creekbed 42 overlies 42 gravel pit 42 Mount Emmons 42 uranium tailings 42 syncline 42 lode 42 granite quarry 41 outcroppings 41 opencast mine 41 unpatented claims 41 caliche 41 tailings impoundment 41 Soledad Canyon 41 mudstone 41 limestone cave 41 Sawtooth Mountains 41 towering cliffs 41 limestone 41 breccia pipe 41 hollows 41 petroglyph 41 Surface Mine 41 bottomland 40 sandstone 40 Sheep Mountain 40 minable 40 Namib Desert 40 boulder 40 rock outcrops 40 volcanic rock 40 limestone cliffs 40 scarp 40 salt flats 40 porphyry deposit 40 granite boulders 40 mill tailings 40 Athabasca basin 40 gravel quarry 40 mine 40 coalfield 40 arroyos 40 peat bog 40 clearcuts 40 Columbian mammoth 40 Homestake Mine 40 opencast 40 geologic 40 landform 39 graben 39 outcropping 39 open pittable 39 Meteor Crater 39 Santa Juana 39 karst 39 frac sand 39 beaver pond 39 depositional 39 cliff dwellings 39 mesas 39 valley fills 39 basalt 39 chert 39 roadless forests 39 steep canyon 39 massif 39 Hogback 39 escarpment 39 evaporation ponds 39 alluvial deposits 39 SITLA 39 limestones 39 steep slope 39 rockface 39 trackway 39 coal mine 39 barrens 38 coalmine 38 undevelopable 38 calcareous