erosion uplift mountain erode player end round gain point card mountain deltathe basic rule introduce player action weather hillslope fluvial draw card advanced rule add detail atmospheric change ice age glacier flood volcanism quake etcmountain far dynamic limitation human lifetime suggest growth death involve cycle planet habitable machinery cycle call erosion weathering rock transport sea subducte mantle volcanoes return silicate sulfate water carbon dioxide oxygen surfacealmost step erosion process catalyze water instance turn weather rock crystallization bust rock grow evaporate salt crystal transport remain river creep movement propel wetdry freezethaw cycle plunk river erode material move sediment sea braid river carry maximum sediment load stable trickiest playthe role erosion atmosphere control overlook mountain titanic terraformer greenhouse gas scrubber weathering remove billion ton oxygen billion ton carbon dioxide air year biological function respiration decay contribute atmosphere erosion past episode way leave unchecked major orogenic mountainbuilding event remove co ocean freeze erosion game turn million year scale game american megafauna hand major flood volcano deccan trap pour hundred trillion ton co air dwarf output human industry combine

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