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riverhead riverbank rapids puddle oxbow nyanza narrows millpond lough loch laguna lagoon headwaters freshet fountainhead euripus distributary debouchment creek billabong bayou woods wold wilderness weald Underwood undergrowth tussock underbrush timberland thicket sylvan spinnery scrubland motte copse coppice chaparral brushwood canebrake boscage backwoods wetland wasteland veld Vega tickle sward swale steppe scabland salt marsh salina quicksand quagmire quag pocosin peat bog paludal mire llano glade flatland fjeld everglade coastal clearing chott champaign campo water gap vista vale tor submontane strath tableland serac sinkhole sierra ravine promontory precipice pinnacle nunatak monticule krantz kopje knoll knap kloof intervale hummock hogback hilltop hillside gully gulch glen glacis foothill escarpment dingle donga dell dale cuesta crevice couloir coulee corrie combe col cenote butte brae canyon barranca arete alp touchstone stinkstone rottenstone mudstone grit dripstone chert buhrstone buhr steatite phyllite quartzite hornfels greenstone granulite gneiss silicate calc amphibolite volcanic ash tuff traprock trachyte pyroxenite pumice pitchstone peridotite syenite monzonite kimberlite granodiorite pegmatite gabbro felsite dunite dolerite diorite diabase phonolite clinkstone carbonatite aplite anorthosite andesite white gold tombac sterling silver spiegeleisen invar elinvar constantan cast iron Carbon Steel alnico zircon tigereye tiger's-eye sunstone sardonyx sard pyrope peridot onyx nephrite morganite moonstone rubasse milky melanite kunzite jacinth opal girasol demantoid citrine chrysoprase cat's-eye cairngorm bloodstone andradite amazonite almandine alexandrite zincite wulfenite wollastonite wolframite witherite willemite wavellite vivianite variscite vanadinite uraninite ulexite trona triphylite tremolite torbernite thorite thenardite tetrahedrite tephroite tantalite sylvite sylvanite strontianite harmotome stannite spodumene spinel sphene sphalerite sperrylite sodium nitrate sodalite smithsonite smaltite skutterudite sillimanite siderite scolecite scheelite scapolite rutile riebeckite rhodonite rhodochrosite pyrrhotite pyroxene