This blog explores Colorado geophenomena by focusing on geology, mineralogy, paleontology, and other related Earth science topics. Gemstone sites in the Pikes Peak region are examined. Dinosaur and other fossils in Colorado are investigated. Current research on the mammoth remains and the Ice Age pollen found at the Florissant fossil beds is shared. Essays on Colorado mining are on this blog. Sometimes there will be poetry related to Earth science.
Wednesday, April 7, 2010
Arrastras at Buckskin
This arrastra lies on the south side of the road, about a mile beyond the townsite. An arrastra is a stone basin where a large stone (“muller”) was fastened to a horizontal arm and wheel. A man or mule walked around the basin, dragging the stone weight which would grind the ore rock. Water from the Buckskin Creek ran into the basin and washed the pulverized rock and gravel, leaving the heavier gold in the bottom of the basin. Miners then excitedly scooped out the gold. Photo by Lin Smith. Photo date 2009.
To the right is a closeup of the center of the arrastra.