IOWA ACADEMY OF SCIENCES, VOL. Ill 





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Figure 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 

 subsequently filled with a second set of beds which overlapped obliquely the eroded 

 edges of the first. 



