Sediment Sampling

Anth 586 students are performing granulometric analyses on sediments from the Folsom wedge and the Clovis block.  Students will analyze particle size distributions and make observations on the morphology of individual sediment grains.  These data will help interpret the conditions under which sediments were deposited, and thus interpret the environment in which the Folsom- and Clovis-age deposits accumulated.  A total of 1000g of sediment was collected from the two blocks, with each student responsible for examining a 100g sample.  Sample collection in the SE quad of the Folsom wedge was complicated by the dense bone in that area. 

Donald Brothers collects a sediment sample from the Clovis block.  Note the sandy texture and gravels.

Donald Brothers collects a sediment sample from the Clovis block. Note the sandy texture and gravels.

 Sediment samples were collected by first cleaning off a fresh surface of the sediment block to avoid any foreign sediments introduced from the plaster jacket or other sources of contamination.  Sediments were then excavated with trowels and bamboo tools and collected by brush into containers.  When collection was complete, the contents of the containers were transferred to ziplock bags and labeled.  Samples were taken to Lea Hall for preparation and analysis.

Jim McKenzie and Steve Kilgore collect sediments from NE quad of the Folsom wedge.

Jim McKenzie and Steve Kilgore collect sediments from NE quad of the Folsom wedge. Folsom wedge sediments are considerably more fine-textured.

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