Related by context. Frequent words. (Click for all words.) 62 hydrothermal breccia 60 breccia zones 59 granitic rocks 58 schists 57 tuffs 57 andesitic 57 gneisses 55 calcareous 54 graben 53 metamorphic rocks 52 mudstones 51 metamorphism 51 alluvium 51 erosional 49 ridging 48 granitic 48 hydrothermal fluids 48 mineralizing 48 depositional 47 sulfide minerals 47 basalts 46 membranous 46 basaltic 45 loess 45 talus 45 sulphide minerals 44 sawtooth 44 embayment 44 stroma 44 lava tubes 44 scalloped edges 44 hydrothermal activity 43 calcite 43 subcutaneous tissue 43 papules 42 lithosphere 42 bimodal 42 crustal 42 nodular 42 radially 42 oceanic crust 41 equatorial waters 41 igneous rocks 41 polar vortex 41 oblong shaped 41 fluvial 41 landforms 41 escarpments 41 wavelike 41 vertical shafts 40 deep gorges 40 chamfered 39 ocean ridges 39 sparse vegetation 39 deciduous forests 39 variably 39 gently curved 39 corrugations 39 hexagonal 39 irregularly shaped 39 topographically 39 igneous rock 39 cusps 39 basalt 39 vertically stacked 38 pebbly 38 knolls 38 depressions 38 extinct volcanoes 38 planktonic 38 rock outcrops 38 ellipsoid 38 supercells 38 triangular 38 mesoscale 38 discontinuities 38 lattice 38 spherules 38 paved walkways 37 grassy plains 37 refugia 37 magma chamber 37 rectangular shapes 37 rocky outcrops 37 parenchymal 37 contiguously 37 diffusely 37 cankers 37 medullary 37 widely spaced 37 vertically oriented 37 oxbows 37 tightly spaced 37 horizontal 37 steam vents 37 phytoplankton blooms 37 oval shaped 37 dendritic 37 curvilinear 37 pentagonal 37 granite boulders