598 



SAMUEL CALVIN 



lies in a cultivated field on the long gentle slope above the road 

 which follows the north line of the section. The dimensions above 

 ground are 27X21X11 feet. Some of the faces are surfaces of 

 fracture, and the angles remain sharp and unaffected by weather. 

 A fragment of smaller size, evidently split off from the larger mass 

 during the time of transportation, equally fresh as to angles and 



Fig. 10. — View in Section 14, Township 95, Range 16, showing one of the largest 

 and most typical of the Iowan bowlders on dry ground, with sharp angles unaffected 

 by weathering. 



general surface, lies a few rods to the northeast. A very fine 

 bowlder (Fig. n), more massive than the Charles City specimen, 

 unbroken in transportation, lies near the southeast corner of the 

 city park in Nora Springs, and there are neither " draws" nor 

 "sloughs" anywhere near it. Probably the largest bowlder in the 

 state, the largest so far recorded, occurs in a dry pasture near the 

 southwest corner of Section 22, Township 94, Range 15 (Fig. 12). 

 It is more than forty feet in length, a block of characteristic Iowan 



