"From 230 million to 5 billion years ago" . . "Estratigrafía Estados Unidos Alaska Precámbrico." . . "Geological Survey (U.S.)," . . "Geology, Stratigraphic Precambrian." . . "Sea-floor spreading Alaska." . . "Estratigrafía Estados Unidos Alaska Paleozoico." . . "Geology Alaska." . . "Geology, Stratigraphic." . . "Geology." . . "Precambrian Geologic Period." . . "Sea-floor spreading." . . . . "Paleozoic Geologic Period." . . "Fondos marinos Expansión." . . "Alaska." . . "Geology, Stratigraphic Paleozoic." . . . . . . . . "Paleozoic and precambrian rocks of Alaska and their role in its structural evolution" . . . . . . . . . . . . . . . . . . . . . . . . . "Paleozoic and precambrian rocks of Alaska and their role in its structural evolution : stratigraphy and correlation of Paleozoic and Precambrian rocks of Alaska, tectonic framework of sedimentation, and their bearing on sea-floor spreading and continental drift in the Arctic" . "Paleozoic and Precambrian rocks of Alaska and their role in its structural evolution" . "Paleozoic and Precambrian rocks of Alaska and their role in its structural evolution"@en . . . "Additional title page description: Stratigraphy and correlation of Paleozoic and Precambrian rocks of Alaska, tectonic framework of sedimentation, and their bearing on sea-floor spreading and continental drift in the Arctic." . . . . . . . .