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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)


Journal of Sedimentary Petrology
Vol. 35 (1965)No. 1. (March), Pages 251-256

Laboratory Growth of Pisolite Grains: NOTES

Jack Donahue


Four conditions are considered essential for the occurrence of oolite and pisolite grains in caves and mines: supersaturated calcium carbonate solution, grain agitation, nucleus, and a splash cup. Accretionary grains formed in this way typically show concentric laminations with oriented crystals. A laboratory model which qualitatively duplicates the four conditions of the natural system produced pisolite grains by inorganic crystal growth with concentric laminae but without crystal orientation. Experimental growth rates were 1.5 to 2.5 times higher than those occurring in nature. This higher rate may have prevented orientation of crystal structure.

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