334 COUNTY AND REGIONAL GEOLOGY. 



The next exposure seen in passing 



FlG ^^- up the valley of the Grand river, is 



^|j|jjjiK represented by Fig. 25. It occurs in its 



u 

 /S j|BS£ ^ e ^ bank, on land belonging to Mr. 



/ J^e^M^=^^\s, Carter, and near the crossing of the 



Burlington and Missouri Kailroad. 



Section at Carter's 



No. 5. Light colored marly shale 3 feet. 



No. 4. Yellowish gray limestone in thin layers, with yellowish marly 



partings : 2 feet. 



No. 3. Bluish, marly shale 2 feet. 



No. 2. Black carbonaceous shale. ' 2 feet, 



No. 1. Blue clayey shale, alternating with thin layers of blue, hard 



and impure limestone 5 feet. 



Total 14 



All the strata represented by the foregoing sections, together 

 with all others found exposed in Union county, are of Upper 

 coal-measure age, and all probably belong within a vertical 

 range of thirty feet, so nearly do the slopes of the streams 

 coincide with the southerly dip of the strata; and the strati- 

 graphical equivalents of the whole of this vertical range 

 are regarded as being included within the lower half of 

 the limestone portion of the section at Winterset, in Madison 

 county. 



Material Resources. As has been said of a number of 

 other counties, the material resources of Union county, so far 

 as at present demonstrated, consist of its fertile soil, its 

 stone, and the forest trees that skirt its streams. Referring 

 to the preceding sections of the strata exposed at various 

 points along the valley of Grand river, it will be seen that a 

 large proportion of them consist of limestone. These, 

 together with some others in the valleys of small creeks and 

 ravines that come into that river, and not before mentioned, 

 will be found to afford large quantities of building stone, 

 besides any desired quantities of excellent lime. 



All the strata found exposed in Union county belonging to 



