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Recent excavations in south-central British Columbia have revealed a 7,500 year sequence which indicates cultural relationships with the subarctic and the Canadian Prairie Provinces, but few similarities with Columbia River sites until after A.D. 1000. South-central British Columbia and the Columbia Plateau are considered to have participated in different cultural traditions until the damming of the Columbia River about A.D. 1250 allowed the upriver passage of salmon. The similarities noted between British Columbia and Columbia River sites in late prehistoric times may be attributable to the sudden increase in the resource potential of the Columbia River.

Interest in the use of microscopes for the analysis of lithic technology and functional interpretations has increased in recent years. Some minerals and rocks are more suitable than others for these studies. In order to communicate the observations made through the microscope, the archaeologist can use the microscope to take photomicrographs using relatively simple and inexpensive equipment.

An alternative to photomicrography is suggested for photography of specimens in analysis of technology and artifact functions. The photomacrographic system yields superior results up to 40x, at which point photomicrography is preferred. It is suggested that enlarging, movie camera, or specialized macro lenses coupled to view or press cameras, can duplicate results achieved with expensive commercial systems.