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Removal of Gypsum from Microfossiliferous Shales

Royal H. Mapes and Gene Mapes
Micropaleontology
Vol. 28, No. 2 (1982), pp. 218-219
DOI: 10.2307/1485233
Stable URL: http://www.jstor.org/stable/1485233
Page Count: 2
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Abstract

The removal of gypsum from gypsum-rich, microfossil-bearing residues can significantly reduce acquisition time. It can be accomplished by a modification of the shale disaggregation techniques described by Collinson (1963) and Sohn et al. (1965), namely re-drying the gypsum rich residues and soaking them in organic solvent followed by immersion in water. Washing must occur within 30 minutes after the water has been placed on the sample.

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