The Geoarchaeology class had two assignments from last week:
1) Updating and validating plan view maps from the previous excavation efforts of the Folsom wedge in 2009.
Once the plan views were updated and the initial identifications made, a preparatory cleaning of the bison bone and matrix was conducted to prepare for removal of the stabilized bone.
2) Beginning the granulometric analysis from auger tests at LA3324 Locality X.
The granulometric analysis refers to the measurement of sediment grains with regard to the distribution of particle sizes in a sample. Particle size distribution aids the interpretation of conditions under which sediments were deposited, including the strength and variability of the transport agent (Kilby 2011).
Students prepared sediment samples by first removing extraneous particles, disaggregating consolidated sediments, then size grading through a nested set of sieves. Most of the size grading work was performed by the mechanized Ro-Tap shaker. Once the individual levels of sediment were size graded and weighed, a microscopic analysis of each size class was conducted to record observations of texture, sphericity, organics, and micro-artifacts.