Archive image from page 35 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 16 THE DAWN OF LIFE. must be, unknown to us; for it was only after the Laurentian rocks liad been deposited, and after tbe shrinkage of the earth's crust in subsequent times had bent and contorted them, that the foundations of the continents were laid. The rude sketch map of America given in fig. 4 will show this, and will also show that the old Laurentian
Archive image from page 35 of Dawn of life being the. Dawn of life: being the history of the oldest known fossil remains, and their relation to geological time and to the development of the animal kingdom dawnoflifebeingh00daws Year: 1875 16 THE DAWN OF LIFE. must be, unknown to us; for it was only after the Laurentian rocks liad been deposited, and after tbe shrinkage of the earth's crust in subsequent times had bent and contorted them, that the foundations of the continents were laid. The rude sketch map of America given in fig. 4 will show this, and will also show that the old Laurentian mountains mark out the future form of the American continent. Tig. 4. The Laurentian Nucleus of the American Continent, Rocks so highly altered as the Laurentian beds can scarcely be expected to hold well characterized fossil remains, and those geologists who entertained any hope that such remains might have been iDreserved,
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