Magnestan Series of the Northwestern States 121 



Main Body of Limestone means Oneota and Shakopee, 

 in the Final Report, vol. 2. (1888), p. 382. 



New Richmond or Richmond means New Richmond, 



in the Final Report, vol. 2 (1888), p. c),ii,y7. 



p. 80-83 

 - " p. 388. 



Shakopee means Shakopee formation, 



in the Fourth Annual Report (1875), p. 38. 

 in the Fifth Annual Report (1876), p. 26. 

 in the Final Report, vol. i (1884), pp. 217-219. 



p. 252. 

 " " p. 285. 



" 2 (1888) p. 21. 

 " " pp. 9, 10, 38. 



" " pp. 70-73. 



Shakopee means Oneota, New Richmond and Shakopee together, 



in the Second Annual Report (1873), p. 138. 



in the Sixth Annual Report (1877), p. 120. 



in the Final Report, vol. i (1884), p. 336. 



" " p. 429- 



" ' 2 (1888), p. 124. 



In the Wisconsin Geological Survey reports, especially the 

 Final Reports of the Survey of 1873- 1879, the name Potsdam 

 sandstone is uniformly used for all the formations from and in- 

 cluding the Jordan sandstone downwards into the Cambrian. 

 The name Madison beds or sandstone is consistently used for an 

 upper part of the Potsdam, and also the name Mendota beds or 

 limestone for the next lower part. As now known, these two 

 formations are equivalent to the formations in Minnesota, respec- 

 tively Jordan (syn. Madison) sandstone and St. Lawrence (syn. 

 Mendota) formation. Unfortunately the rules of nomenclature 

 here require the newer names to yield. The change can be 

 easily applied because the displaced names were consistently used 

 in relation to the geologic formations. Detailed citation is there- 

 fore not necessary. 



The name Lower Magnesian limestone is applied in the Wis- 

 consin reports without discrimination between the upper, Shako- 

 pee, and lower, Oneota, dolomite, both of which formations the 

 name covers, excepting by one author, L. C. Wooster (vol. 4, 

 1882, p. 106), who distinguishes the Lower Magnesian proper 

 (i.e., Oneota) from the Willow River beds (i.e., Shakopee) and 

 designates the sandstone between them New Richmond. 



