. Elements of geology : a text-book for colleges and for the general reader. Geology. 286 LAURENTIAN SYSTEM OF ROCKS These, then, are the oldest known rocks. They form the first vol- ume of the recorded history of the earth. Yet they evidently are not. Fig. 256.—Section across Santarita Mountain, New Mexico: c. Carboniferous; 8, Silurian; A, Archaean; m, metalliferous vein (after Gilbert). the absolute oldest; evidently they do not constitute any part of the primitive crust. For they are themselves stratified or fragmented. Please note that these images are extracted from scanned page images t
. Elements of geology : a text-book for colleges and for the general reader. Geology. 286 LAURENTIAN SYSTEM OF ROCKS These, then, are the oldest known rocks. They form the first vol- ume of the recorded history of the earth. Yet they evidently are not. Fig. 256.—Section across Santarita Mountain, New Mexico: c. Carboniferous; 8, Silurian; A, Archaean; m, metalliferous vein (after Gilbert). the absolute oldest; evidently they do not constitute any part of the primitive crust. For they are themselves stratified or fragmented. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original LeConte, Joseph, 1823-1901. New York : D. Appleton and Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1892
