Essentially, in this region the distribution of each raw material must be examined separately. This also means that the context of raw material utilization for sites in this region is more particularistic, and must be examined almost on a site by site basis. This concept of three raw material resource regions is obviously a simplification of a complex situation. But, as mentioned above, it is just this kind of complexity that makes an appropriate simplification useful. Within a region, all lithic raw materials are not of equal importance.
Some materials are common, others are rare.
Some materials were commonly used in prehistory, others only infrequently so. The redistribution of such sediments by glacial action may account for the rare occurrences of noncharacteristic lithic raw materials. This is, however, a minor raw material source. The views and opinions expressed in this page are strictly those of the page author. The contents of this page have not been reviewed or approved by the University of Minnesota.