IOWA ACADEMY OF SCIENCES. VOf,. 111. 



PLATE II. 



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FiGDBE 1 Thin-bedded LeClaire limestone overlying the phase represented in 

 Plate I, figure 2. as seen on west side of Main street, LeClaire, Iowa At this point 

 sub-marine erosion removed portions of certain beds, and the space so formed was 

 sul)se(iu(ntl.y filled with a second set of beds which overlapped obliquely the eroded 

 edges of tlie "first. 



