Posts about minerals

Historical Engineering: Hanging Flume

Hanging flumephoto of hanging flume overlook in Colorado, by John Hunter, Creative Commons Attribution.

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While driving from Dinosaur National Monument to Mesa Verde National Park last year I passed the sight above with the remnants of a hanging flume. The Montrose Placer Mining Company built a 13 mile canal and flume to deliver water from the San Miguel River for gold mining operations. The last 5 miles of the flume clung to the wall of the canyon itself, running along the cliff face in the photo above (see more photos).

Constructed between 1888 and 1891, the 4 foot deep 5 foot 4 inch wide hanging flume carried 23,640,000 gallons of water in a 24 hour period. The mining operations used water and sluice boxes to separate the gold from lighter materials (dirt and gravel).

The technology was not yet available to pump the water directly from the river at the necessary volume and pressure to wash the gold from the gravel, therefore they constructed the flume to transport the water.

Related: Mount Saint Helens Photosphotos of Manhattan (Rockefeller Center, Empire State Building…)C&O Towpath – Monocacy Aqueduct to Calico Rocks
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Elbaite with Albite

photo of
Photo of Elbaite with Albite, Na(Li, Al)3Al6(BO)3)3Si6O18(OH)4, at the Smithsonian Natural History Museum in Washington DC, by John Hunter.

Related: MalachiteLibrary of Congress photosThe Cloisters Museum and the Museum of Modern Art photos

Crystal Growth – Manganese Oxides

photo of Manganese Oxides - Dendritic crystal growth

Photo of Manganese Oxides – Dendritic crystal growth, MnO2, at the Smithsonian Natural History Museum in Washington DC, by John Hunter. Related:Science and Engineering Web SearchBoston Science Museum photos

Geothite

photo of geothite

Photo of Geothite, FeO(OH), Hydrated Iron Oxide, at the Smithsonian Natural History Museum in Washington DC, by John Hunter. Related:Science and Engineering Web SearchBoston Science Museum photos

Cu2C03(OH)2

photo of malachite

Photo of Malachite, Cu2C03(OH)2, copper(II) carbonate hydroxide, at the Smithsonian Natural History Museum in Washington DC, by John Hunter. Related: United States Botanical Garden photosScience and Engineering Web Search

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