Sand, Long Canyon, Arizona
This is a group of magnetite crystals that agglomerated during mounting. They are part of the "Heavy" mineral collection from the sand in the dry streambed in Long Canyon. They separated in the greater than 2.8 gram/cc fraction of the density column.
Reflected Darkfield Illumination
Welland, Michael, SAND: THE NEVER ENDING STORY, University of California Press, 2009.
http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artjun01/clsand.html
(Good Information on the microscopy of sand, Great site for more information on microscopy in general)
http://www.scientificamerican.com/article.cfm?id=a-grain-of-sand-natures-secret-wonder
(Good Information on Sand with links to more information on sand)
http://www.sciencelive.org/component/option,com_mediadb/task,play/idstr,Open-feeds_fsc_exploring_sedimentary_processes_fsc02_02_m4v/vv,-2/Itemid,97
(Brief, very informative video on what can be learned from the shape of a sand grain.)
Definition/Function:
Magnetite is naturally magnetic and in suspension will tend to agglomerate.
Significance in the Environment:
Characteristic Features:
Associated Particles:
References:
Greenberg, Gary, A GRAIN OF SAND: NATURE'S SECRET WONDER, Voyageur Press, 2008.Welland, Michael, SAND: THE NEVER ENDING STORY, University of California Press, 2009.
http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artjun01/clsand.html
(Good Information on the microscopy of sand, Great site for more information on microscopy in general)
http://www.scientificamerican.com/article.cfm?id=a-grain-of-sand-natures-secret-wonder
(Good Information on Sand with links to more information on sand)
http://www.sciencelive.org/component/option,com_mediadb/task,play/idstr,Open-feeds_fsc_exploring_sedimentary_processes_fsc02_02_m4v/vv,-2/Itemid,97
(Brief, very informative video on what can be learned from the shape of a sand grain.)
