undiscovered, unexplored, uncharted, unsurveyed, terra incognita, inaccessible, untraveled, palaeo, rubbly, uninhabited, unexploited, pathless, untrodden, unremembered, unpeopled, geomorphic, unchartered, seismologic, palaeontological, abyssal, unmined, undiscoverable, unnavigable, geological, denali fault, biogeographical, cryptozoological, untouched, unknown, subglacial, traversable, ferruginous, glacial, undeveloped, subterranean, unrecognized, archaeo, geologic, unaccessible, unstudied, explorable, trackless, unnamable, unpassable, cenozoic, glaciated, palaeozoic, unfrequented, neogene, driftless, obscure, syrtis major, hummocky, orogenic, unpaved, depositional, semidesert, undisturbed, undetected, unrecorded, unsearchable, unsuspected, illimitable, erosional, hominoid, upper carboniferous, undefined, nameless, desolate, ungoverned, unreachable, calendrical, archaean, intertidal, unplumbed, unnoted, loess, deltaic, undistinguishable, barren, noachian, carboniferous period, john hanning speke, unknowable, prehistorical, unreclaimed, undeciphered, chemosynthetic, unexamined, basinal, lateritic, unfathomed, subaqueous, subaquatic, haematite, swampy, snailfish, argentiferous, igneous rock, gradational, unpopulated, crustal plate, mountainous, inhospitable, roadless, hilly, populated, peopled, sparsely, marshy

chartless, uncharted, unknown