]42 Artesian Well Borinrj in Southeastern Minnesota — Hall. 



IX. The Red Wing Weli *— C. W. Hall, 



Height above the sea, 686 feet. 



Formation 1. Wanting. A heavy deposit of river silt and gravel,, 

 probably to a large extent made up of No. 1, was passed through. Thick- 

 ness, 40 feet. 



2, 3, 4, 5, 6, 7, 8 and 9. All wanting. 



10. One hundred and forty-five feet of blue shale sands and mingled 

 sandstone, quartz — and limerock are assigned here. These would form only 

 the lower part of the St. Lawrence, which at Hastings, 20 miles away, shows 

 a thickness of 213 feet. 



11. From the bottom of the preceding, 185 feet deep, to the bottom of 

 the well, no material variation in the drillings was noted; all were "sandstone, 

 white and soft." The drilling stopped in a hard streak possessing a red 

 color, probably the top of the Potsdam formation. 



"Total depth of the well 500 feet. Great abundance^of water, slightly 

 impregnated with iron. Pressure at the R. R. depot 40 lbs. per square inch." 

 — W. E. SwAX. 



X. The Lake City Wellj— C. W. Hall. 



Height of Lake City depot above the sea, 705 feet. 



Formation 1. Wanting. Here also as at Red Wing, a river deposit is 

 passed. Thickness, 207 feet. 



2, 3, 4, 5, 6, 7, 8 and 9. Wanting. 



10. "Blue sand shale, 68 feet." 



11. Gray sand and shale, 25 feet. 



. 12. Gray sandstone and gray sandy shale, 112 feet. 



13. Red and yellow sandstones and gray sandy shales, 88 feet. 



14. "Red shale and quartzite, 320 feet." 



The above references are based on Mr. W. E. Swan's notes to the writer. 

 Water comes to within 45 feet of the surface. Well bored for the C, M. & 

 St. P. Ry. Depth, 820 feet. 



XI. The Brownsville WellJ— C. W. Hall. 



Height above the sea about 640 feet. 



Formation 1. Wanting. A blue clay, probably river deposit, occurs, 

 40 feet in thickness. 



2, 3, 4, 5, 6, 7, 8, 9 and 10. Wanting. 



11. Limestone,§ 25 feet. 



12. Blue shale 60 feet and a green shale 70 feet; total thickness of the 

 vSaint Croix shales 130 feet. 



13. Sandstone 395 feet. 



*Mr. Swan's notes are also given in the 13th An. Rep. Geol. and Nat. Hist. Sur. 

 Minn., p. 67. 



tAls > Geol and Nat. Hist. Sur. Minn 13th An. Rep. p. 58, 



JFrom notes given Warren Upham by W. K. ^\\an. who drilled the well. Some 

 charges have been made, for which Mr. Uph^m should not be responsible 



g.As N. H. Wincheli observes, IHth An. Rep p. 59, this is m donbiful determination. 

 If )t be based on an acid test it could be only p>'rt ally saii^factory. for even the 

 Dresbach sandst" ne effervet^ces to a consid^-rable »-xtent in hydrochloric acid. A little 

 firther admixture of carhonntcs into this sandstone Would iorm a rock answenug to 

 whalare presumed to be the conditions of this layer. 



