minnbuckeye Posted January 11, 2020 Share Posted January 11, 2020 "Maple Mill Formation near Kalona, Iowa." came up in a topic about Devonian Shark's teeth. It is a micro matrix type of material that I am interested in collecting next summer. I hunt just north of Kalona anyways!!! Has anyone ever collected this matrix or knows the location of the Kalona Clay Pit?? All of my research reveals only vague references and looking at google maps shows little exposure of rock around Kalona. All help would be greatly appreciated. Thanks, Mike Link to comment Share on other sites More sharing options...
Oxytropidoceras Posted January 11, 2020 Share Posted January 11, 2020 I can find four references for the Kalona Clay Pit. They are: Chauff, K.M. and Price, R.C., 1980. Mitrellataxis, a new multielement genus of Late Devonian conodont. Micropaleontology, pp.177-188. Davis, R.A. and Semken, H.A., 1975. Fossils of uncertain affinity from the Upper Devonian of Iowa. Science, 187 (4173), pp.251-254. Laudon, L.R., 1931. The stratigraphy of the Kinderhook Series of Iowa. Iowa Geological Survey Annual Report, 35(1), pp.333-452. https://ir.uiowa.edu/cgi/viewcontent.cgi?article=1250&context=igsar Olempska, E. and Chauffe, K.M., 1999. Ostracodes of the Maple Mill Shale Formation (Upper Devonian) of southeastern Iowa, USA. Micropaleontology, 45(3), pp.304-318. Olempska and Chauffe (1999) states: "The Kalona Clay Pit was opened by the Farley Brothers Brick Company early in the twentieth century as a source of clay for making building and paving bricks. After a short period of operation, the pit was abandoned. In 1978 the exposed Maple Mill section in the Kalona Clay Pit was approximately 4.5 meters high, eight meters long and capped by a .75 meter exposure of English River Siltstone. The channel of a small unnamed, intermittent tributary of the English River formed the base of the outcrop. The lower contact of the formation was not visible at this location." Olempska and Chauffe (1999) and the other papers, should provide the locality information that you want. Yours, Paul H. 3 Link to comment Share on other sites More sharing options...
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