Page:Popular Science Monthly Volume 3.djvu/218

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THE POPULAR SCIENCE MONTHLY.
Fig. 3.General section of the drift From Toledo, Ohio to Shelby County, Ohio
  1. No. 2. (clay subsoil).
  2. No. 2. (gravel and sand subsoil).
  3. Glacial stratification within the hard pan.
  4. Hard pan, glacier drift, holding striated bowlders—(No. 3.)
  5. Gravel, sand, and bowlders, holding water.—(No. 4.)
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