 Washington county, in the midst of the marl region, is a locality of fossil fresh water shells, of the genus unio. They are imbedded in coarse sand or gravel, cemented by ferruginous matter. The specimens are casts, replaced by an argillaceous oxide of...  Proceedings of the Ohio Academy of Science - Page 10by Ohio Academy of Science - 1899Full view - About this book
 | Ohio. General Assembly - 1836 - 174 pages
...ferruginous matter. The specimens are casts, replaced by an argillaceous oxide of iron. The spot in which they are found, has once evidently been the bed of an ancient lake or pond. Ii is now a beautiful valley of a mile or more in width, by four miles in length, surrounded by low... | |
 | Geological Survey of Ohio - 1874 - 794 pages
...ferruginous matter. The specimens are casts, replaced by an argillaceous oxide of iron. The s{K>t in which they are found has once evidently been the bed...four miles in length, surrounded by low hills. On the sotftb side a small branch drains the superfluous water into the Little Hockhocking. In digging wells... | |
 | Geological Survey (U.S.) - 1903 - 170 pages
...genus Unio. They are imbedded in coarse sand or gravel cemented by ferruginous matter. The spot in which they are found has once evidently been the bed...now a beautiful valley of a mile or more in width by i miles in length, surrounded by low hills. On the south side a small branch stream drains the superfluous... | |
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