In 1994, Morrow published an article entitled, A Key to the Identification of Chipped-Stone Raw Materials Found on Archaeological Sites in Iowa, which serves as the basis for the Visual Basic Script program above. Included in the article is a state-wide map of chert bearing bedrock systems, definitions of lithic macroscopic attributes, descriptions for 35 of the most commonly occurring lithicraw material types in Iowa, and a logic diagram employing multiple macroscopic attributes to help correctly identify raw material (Figure 9). This macroscopic identification key has been the primary resource available for identifying chert samples and lithic characteristics in Iowa. The logic diagram asks a series of “yes / no” questions regarding macroscopic attributes such as texture, fossil content, grain size, mottling, transparency, and color which leads to an identification page complete with two sized pictures and accompanying written descriptions. Morrow 1994 In Journal of the Iowa Archeology Society, 41:108-129.
Figure 9. Logic diagram example page from the VBS Lithics Program
VBS Lithics Program: Click here to begin.