The Geological Society of America

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The Geological Society of America provides access to elements that are essential to the professional growth of earth scientists at all levels of expertise and from all sectors: academic, government, business, and industry.
Particle sizes of andesitic ash fallout from vertical eruptions and co-pyroclastic flow clouds, Volcan de Colima, Mexico
J. R. Evans
Geology(2009), 37(10):935
http://dx.doi.org/10.1130/G30208A.1

The Geological Society of America
The Geological Society of America
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GeoScience World