The ice age in North America and its bearing upon the antiquity of man5th edwith many new maps and illus., enland rewritten to incorporate the facts that bring it up to date, with chapters on Lake Agassiz and the Probable cause of glaciation . Fig. 166. -Chipped pebble of black chert, found by Dr. C. L. Metz. October, 1885. at Madi-sonville. Ohio, in gravel eight feet from surface under clay. a. face view ; b, sideview. Note its resemblance to Fig. 136, from Trenton, New Jersey. (No. 40,970.)(Putnam.) Metz, in gravel, eight feet below the surface, in Madison-ville, Ohio. This rude implement is
The ice age in North America and its bearing upon the antiquity of man5th edwith many new maps and illus., enland rewritten to incorporate the facts that bring it up to date, with chapters on Lake Agassiz and the Probable cause of glaciation . Fig. 166. -Chipped pebble of black chert, found by Dr. C. L. Metz. October, 1885. at Madi-sonville. Ohio, in gravel eight feet from surface under clay. a. face view ; b, sideview. Note its resemblance to Fig. 136, from Trenton, New Jersey. (No. 40,970.)(Putnam.) Metz, in gravel, eight feet below the surface, in Madison-ville, Ohio. This rude implement is about the same size andshape of one made of the same material, found bj Dr. Ab-bott in the Trenton (N. J.) gravel, and is of special interestas the first one known from the gravels of Ohio. ProfessorPutnams announcement, followed by a letter from Dr. Metz,saying that he had since found another implement in the Science, vol. i, p. 359. f Proceedings, vol. xxiii, p. 242. MAN AND THE GLACIAL PEHWD. 643 e;ravel at Loveland, led me, on the 11th and 12th of No-vember, 1887, to visit the localities and see their relation tothe glacial deposits of the region. The situation is as fol-lows :. Fig. 167.—Map showing glacial boundary, channels, and terraces near Cincinnati. Madisonville is situated eleven miles nortlieast of Cincin-nati, in a singular depression connecting the Little MiamiRiver with Mill Creek, about five miles back from the Ohio(see Fig. 167). The Little Miami joins tlie Ohio some milesabove Cincinnati, while Mill Creek joins it just below the 644 THE ICE AGE JN NORTH AMERICA. city. The general height of the hills in that vicinity abovethe river is from four hundred to five hundred feet. Butthe hills just north of Cinchinati are separated from thegeneral elevation farther back by the depression referred to,in which Madisonville is situated. The depression is from one to two miles wide, and aboutlive miles long, from one stream to the other, and is occu-pied by a deposit
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