. Elements of geology : a text-book for colleges and for the general reader. Geology. 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. 1 2 Fig. 257.—Section showing- Primordial unconformable on the Archaean: 1, Archaean or Laurentian; 2, Primordial or Lowest Silurian (after Logan). rocks, and therefore formed from the debris of other rocks still older than themselves; a

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. Elements of geology : a text-book for colleges and for the general reader. Geology. 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. 1 2 Fig. 257.—Section showing- Primordial unconformable on the Archaean: 1, Archaean or Laurentian; 2, Primordial or Lowest Silurian (after Logan). rocks, and therefore formed from the debris of other rocks still older than themselves; and these last possibly from still older rocks. Thus,. 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