late latest, upper, early, middle, older archean archean

rocks, shield, shields, crust, res, rock, iron, plate, de, age, times, time granites, basement, banded, igneous, crustal, bedrock, granite, fossils, era, iron, research, period research igneous, crystalline, period geology continental sedimentary

phanerozoic eon, sedimentary, rocks, timearchean eon, greenstone, crust, basement, rocks, ageproterozoic eon, crustal, sedimentary, crust, rocks, strata, basement, sediments, era, agegranitic gneisses, gneiss, rocks, bedrock, basement, crust, rockmetamorphic terranes, schists, terrains, rocks, rock, basement, belt, geology, formations, terrain, core, evolution, deposits, origin, eventsprecambrian gneisses, gneiss, granites, metamorphic, basement, banded, igneous, stratigraphy, crustal, rocks, geology, sedimentary, crystalline, shield, shields, bedrock, granite, fossils, crust, res, sediments, era, continental, rock, iron, plate, age, research, timesplate tectonics, tectonicgreenstone beltbanded gneiss, gneisses, iron, structures, rockorogenic belt, eventscrystalline schists, basement, bedrock, rocks, igneous, crust, formations, rock, structures, deposits, coreigneous rocks, rock, geology, origingranite gneiss, gneisses, bedrock, rocks, rock, formations, beltsedimentary rocks, geology, carbonates, strata, formations, rock, deposits, bedrock, structures, carbonate, origin, evolution, ironmetamorphosed sedimentary, volcanic, rocks, sediments, rockcontinental crust, glaciation, crustal, tectonics, sediments, shields, sedimentary, basement, volcanic, plate, deposits, rocksschist beltcambrian fossils, strata, rocks, sediments, deposits, period, era, age, rock, timesbasement gneisses, gneiss, tectonics, rocks, rockvolcanic rocks, terrains, stratigraphy, rock, formations, belt, origin, deposits, terrain, strata, sediments, geology, basementbedrock geology, formations, surface, exposed, underlyingcarbonate sediments, rocks, platform, formations, bedrock, strata, deposits, sedimentary, rockglacial deposits, stratigraphy, geology, sediments, formations, period, origincrustal rocks, evolution, rock, plate, structures, originrock formations, stratalate proterozoic, precambrian, archean, cambrian, glacial, orogenic, middleplatform carbonates, carbonate, sedimentstectonic evolution, plate, belt, events, structures, origin, historyupper proterozoic, cambrian, crust, strata, crustal, precambrian, atmosphere, middle, surfacemiddle cambrian, proterozoic, strata, precambrian, ageearly proterozoic, cambrian, archean, precambrian, agelower cambrian, proterozoic, strata, crustal, crustlatest proterozoic, precambrian, productionsyounger granites, sedimentary, age, strata, sedimentsocean crust, sediments, surfacecanadian shieldunderlying bedrock, strata, geology, sediments, structures, basementexposed bedrockresearch labsmassive granite, volcanicrocks igneous, metamorphic, sedimentary, exposediron age, formations, core, deposits, plateolder granites, precambrian, strata, metamorphiceon defossil depositsancient times, sedimentary, volcanic, historyold ageterrains desurface sedimentsearth crust, carbonatesmajor orogenic, tectonic, glaciationde terrainsstrata exposednew eraglaciation duringage strata