image: This image shows technological variability at Nor Geghi 1 (NG1). A) Biface with two biface resharpening/thinning flakes. B–C) Levallois cores with Levallois flakes. D) Blade core with blade. A) The biface is the desired product, with the flakes detached during shaping and resharpening treated as waste. B–D) The flakes and blades are the desired products and were used in an unmodified state or retouched into a variety of tool types. This material relates to a paper that appeared in the 26 Sept., issue of Science, published by AAAS. The paper, by D. S. Adler at University of Connecticut in Storrs, CT, and colleagues was titled, "Early Levallois Technology and the Lower to Middle Paleolithic Transition in the Southern Caucasus." view more
Credit: [Credit: Daniel S. Adler]