unexploited, undiscovered, untapped, uncharted, unsurveyed, unchartered, unmapped, undeveloped, unmined, untouched, untrodden, terra incognita, underdeveloped, inaccessible, minable, metallogenic, uninhabited, unspoilt, explorable, unstudied, rubbly, illimitable, lateritic, auriferous, untraveled, cretaceous, untested, unplumbed, upper carboniferous, unknown, palaeo, barren, unspoiled, palaeontological, unrevealed, depositional, basinal, unpeopled, pannonian, silicic, seismologic, overthrust, palaeozoic, palaeocene, petroliferous, orogenic, metalliferous, archaean, geological, mineralized, ultrabasic, unfathomed, unthought, unsuspected, abyssal, desolate, unexamined, sulu sea, unaddressed, archaeo, explorative, sierra madre occidental, pathless, unproved, eluvial, biogeographic, unrecognized, undisturbed, geologic, mesozoic, untamed, hidden, evaporite, subaquatic, stratiform, clastic, phyllosilicate, subaqueous, haematite, lacustrine, exploratory, producible, deltaic, erogenous, glaciated, extractable, unmentioned, unreached, unseen, uncultivated, melville peninsula, gradational, sarmatian, sedimentary rock, undreamed, unaccessible, syrtis major, exploitable, underutilized, unpopulated, abiogenic, untilled, mountainous, trackless, unfrequented, roadless, hilly, populated, inhospitable

guide, pathfinder, scout, terra incognita, unknown, unknown region

undiscovered, unknown