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Published in Soil Sci Soc Am J 32:735-737 (1968)
© 1968 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Vesicular Pores of Pumice by Mercury Intrusion1

G. A. Borchardt, A. A. Theisen and M. E. Harward2

ABSTRACT

The pore size distribution of pumice was measured with a mercury intrusion porosimeter. Effects of particle to particle pores were minimized by use of separates based on size and density. Vesicular pores constituted about 98% of the fine porosity (<120µ diameter) in 1–0.5 mm fractions of pumice. Average diameters of internal pores of pumice were found to be in the range of 3 to 7µ. Distinctive curves were obtained for samples from Mt. Mazama, Glacier Peak, and Newberry Crater.

NOTES

1 Technical paper no. 2453, Oregon Agr. Exp. Sta. Corvallis. Supported in part by NSF Grant no. GA 1355.

2 Graduate Assistant, Assistant Professor and Professor, Oregon State University, respectively.

Received for publication March 21, 1968. Accepted for publication May 24, 1968.






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Copyright © 1968 by the Soil Science Society of America.