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permineralization
Permineralization is a process of fossilization in which mineral deposits form internal casts of organisms. Carried by water, these minerals fill the spaces within organic tissue. Because of the nature of the casts, permineralization is particularly useful in studies of the internal structures of organisms, usually of plants.〔Mani, K. (1996). Permineralization Retrieved March 29, 2009, from Fossils: A window to the past. Web site: http://www.ucmp.berkeley.edu/paleo/fossils/permin.html〕
==Process==
Permineralization is a type of fossilization involving deposits of minerals within the cells of organisms. Water from the ground, lakes, or oceans seeps into the pores of organic tissue and forms a crystal cast with deposited minerals. Crystals begin to form in the porous cell walls. This process continues on the inner surface of the walls until the central cavity of the cell, the lumen, is completely filled. The cell walls themselves remain intact surrounding the crystals.〔Loren E. Babcock, "Permineralization", in AccessScience@McGraw-Hill, http://www.accessscience.com, 〕
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