Annual report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution . cluster of chii)s wasfound, and betweenthe tenth and twen-tieth foot severalchipped stones invarious stages ofelaboration were un-earthed. The crosssection at the twen-tieth foot is shown infigure 6. Through-out the gravel occa-sional bowlders were found, some reaching 6 inches in diametei-. Fromthe twentieth to near the twentyfifth foot the conditions and the con-tents of tlie section showed no irajwrtant change. The dark soil reacheda tl^ckness of 8 inches, and was underlain by a bed of light sandy sub
Annual report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution . cluster of chii)s wasfound, and betweenthe tenth and twen-tieth foot severalchipped stones invarious stages ofelaboration were un-earthed. The crosssection at the twen-tieth foot is shown infigure 6. Through-out the gravel occa-sional bowlders were found, some reaching 6 inches in diametei-. Fromthe twentieth to near the twentyfifth foot the conditions and the con-tents of tlie section showed no irajwrtant change. The dark soil reacheda tl^ckness of 8 inches, and was underlain by a bed of light sandy sub-soil, not before difterentiated, about a foot thick. Many partiallyshaped stones were found in these beds. Beneath this again weregravels and gravelly clays. At about the twentyfifth foot the conditions of the deposits wereobserved to change. The limit of the compact gravels and clays form-ing the base of the deposit was reached, and a mass of rather looseheterogeneous material was encountered. The edge of an ancientexcavation had been reached, though this fact was not at first appre-. FlG. C—Cross section at the twentieth foot. 40 STONE IMPLEMENTS [ETH. ANN. 15 o 35? ^^^^BF ciated; for the idea of aboriginal quarrying had not yet been morethan suggested, and the changes observed in the deposits were at firstattributed to natural distributing agencies. In the light of facts sub-sequently observed, this body of heterogeneovTS material came to berecognized as part of the debris accumulated iu an ancient trench,?which was cut obliquely by our trench. The ancient trenching hadbeen 4 or 5 feet deep at this point, and the side wall was quite brokenand irregular, sloping at a low angle in some places and in others beingvertical or even undercut. The digging had not penetrated to thegneiss surface at this point. The margin of the old trench is seen atb, plate \i. From this point (the twentyfifth foot) the work of exca-vation was carriedthrough the quarrysunFActsoiLniTHBorYLDcns refu
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Keywords: ., bookcentury1800, bookde, booksubjectethnology, booksubjectindians
