The Transition from Rostro-Carinate Flint Implements to the Tongue-Shaped Implements of River-Terrace Gravels . t from which these specimens with triangular section were madewere operated upon in two different ways. (1) By detaching a large flake from oneend, and directing flake-removing blows upon the flat surface thus produced informing the upper, dorsal portion of the implement, and (2) by splitting the noduleinto two pieces, in the direction of its greatest length, and manipulating one or both ofthese pieces in the manner described above. In nearly every case the posterior endof the implem
The Transition from Rostro-Carinate Flint Implements to the Tongue-Shaped Implements of River-Terrace Gravels . t from which these specimens with triangular section were madewere operated upon in two different ways. (1) By detaching a large flake from oneend, and directing flake-removing blows upon the flat surface thus produced informing the upper, dorsal portion of the implement, and (2) by splitting the noduleinto two pieces, in the direction of its greatest length, and manipulating one or both ofthese pieces in the manner described above. In nearly every case the posterior endof the implements exhibits unflaked cortex which appears to have been left to allow ofcomfortable prehension, while very frequently the lower ventral surface shows flake-scarscaused by blows delivered upon the side of the latero-ventral edges. But it is somewhatdifficult to understand why such flakes were removed, as the specimens which exhibitthe flat, untrimmed ventral surface appear to be in every way as useful for cuttingand thrusting purposes. Fig. 15 illustrates an implement of triangular section from Ant. Carina.
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Keywords: ., bookcentury1900, bookdecade1920, bookidphiltrans003, bookyear1920
