Why is All Sand the Same?

Опубликовано 26 ноября 2013, 15:53

Sand, whether you use it for building sand castles, telling time with an hourglass, or hydraulic fracturing, is pretty much the same just about anywhere you go -- an uncountable number of tiny grains mixed together to form the same dunes and beaches. But why does sand almost always look the same?

Note: "ortoclase" at 0:59 should be "orthoclase"

CREDITS
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Created by Henry Reich
Video Concept and Writing: Meg Rosenburg
Writing and Editing Team: Alex Reich, Peter Reich, Emily Elert
Animation: Ever Salazar
Music: Nathaniel Schroeder

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REFERENCES
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Assallay, A. M., Rogers, C. D. F., Smalley, I. J., & Jefferson, I. F. 1998. Silt: 2--62 μm, 9--4φ. Earth-Science Reviews 45(1): 61-88. sciencedirect.com/science/arti...

Bruce Wilkinson, Geology Professor, Syracuse University (personal communication)

Krinsley, D. H., & Smalley, I. J. 1972. Sand: The study of quartz sand in sediments provides much information about ancient geological environments. American Scientist 60(3): 286-291. jstor.org/discover/10.2307/278...

IMAGE CREDITS
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Sand from Gobi Desert en.wikipedia.org/wiki/File:San... Photo by: Siim Sepp

Ruler commons.wikimedia.org/wiki/Fil... Image by: Dnu72

Black Sand Beach: flickr.com/photos/scottiet812/... Photo by: ScottieT812

Red Sand Beach: commons.wikimedia.org/wiki/Fil... Photo by: Tom Walsh

White Sand Beach: flickr.com/photos/diueine/2309... Photo by: Diueine Monteiro

Dunes: flickr.com/photos/davidstanley... Photo by: David Stanley

Sand Mining commons.wikimedia.org/wiki/Fil... by: Aktron / Wikimedia Commons

Beach Photos: Photo by: Myrabella / Wikimedia Commons commons.wikimedia.org/wiki/Fil...

Photo by: José Porras commons.wikimedia.org/wiki/Fil...

Photo by: Viscious81 / Wikimedia Commons commons.wikimedia.org/wiki/Fil...

Photo by: Myrabella / Wikimedia Commons commons.wikimedia.org/wiki/Fil...

Photo by: Sengkang commons.wikimedia.org/wiki/Fil...

Photo by: Sean O'Flaherty commons.wikimedia.org/wiki/Fil...

Photo by: Ayaita commons.wikimedia.org/wiki/Fil...

Photo by: Peter V. Sanchez commons.wikimedia.org/wiki/Fil...

Photo by: Allan Patrick commons.wikimedia.org/wiki/Fil...

Photo by: cogito ergo imago flickr.com/photos/37244380@N00...

Photo by: Wicho 2 commons.wikimedia.org/wiki/Fil...

Photo by: Herbert Vieira commons.wikimedia.org/wiki/Fil...

Photo by: Urville86 commons.wikimedia.org/wiki/Fil...

Photo by: Angelo Juan Ramos commons.wikimedia.org/wiki/Fil...

Photo by: Magnus Manske commons.wikimedia.org/wiki/Fil...

Photo by: Daniel Schwen commons.wikimedia.org/wiki/Fil...