It is a well-known characteristic of the Devonian limestones that to an extraordinary degree they have been affected by the destructive work of percolating water through solution. This is, no doubt, in part accounted for by the comparative purity of these limestones. The chemical process of dolomitization which is characteristic of the Silurian beds is here at a minimum, and rapid solution by meteoric waters has been the result. It is apparent also that the diastrophic movements that have affected the Devonian terranes have facilitated this destructive process. Wherever there are exposures of these beds, either natural or artificial, the results of this destructive work may be seen in the form of crevices, fissures, widened joints, and passage ways of various kinds. Sometimes these are open, sometimes filled with crystalline deposits, sometimes by detritus brought down by the water from above and subsequently dropped.
Proceedings of the Iowa Academy of Science
©1939 Iowa Academy of Science, Inc.
Stookey, S. W.
"Significance of Carboniferous and Late Devonian Material within the Iowa Devonian,"
Proceedings of the Iowa Academy of Science, 46(1), 227-231.
Available at: https://scholarworks.uni.edu/pias/vol46/iss1/51