Grand Archaeology Mortar sample . Grand Canyon National Park: Samples of mud mortar were collected from the excavated structures in order to analyze the mortar with the hope of identifying the sources of the muds that the people used during construction of their homes. Lower Confluence Ian Hough

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Keywords: america, american, archive, arizona, canyon, coconino, conservation, country, county, grand, historic, history, land, lands, mohave, national, natural, nature, np, park, parks, preserve, public, service, usa, widlife, wilderness