Changes which occurred during weathering of the Iowa Falls Member of the Mississippian Hampton Formation at Iowa Falls, Iowa were investigated quantitatively. The physical properties measured were: a) compressive strength, b) pore sized distribution, c) porosity and d) permeability. Chemically determined calcite and dolomite contents are related to the physical changes by utilization of an extensive sample sequence. The following changes are shown to be associated with the weathering process: 1) pore space and the degree of its interconnectedness increases with weathering, 2) calcite and dolomite are leached out during weathering, and 3) the rate of removal of calcite is twice that of dolomite.
Proceedings of the Iowa Academy of Science
©1969 Iowa Academy of Science, Inc.
Simon, D. E.; Elwell, J. H.; Sendlein, L. V. A.; and Lemish, J.
"Measurement of Physical and Chemical Changes Induced During Weathering of A Carbonate Rock Unit,"
Proceedings of the Iowa Academy of Science, 76(1), 320-329.
Available at: https://scholarworks.uni.edu/pias/vol76/iss1/43