1F145] RIPLEY MARL. 99 



S. 22, T. 4 , R. 5 E. Some of the marls mentioned are prob- 

 ably more calcareous than the one analyzed, as appears to be more 

 generally the case in Pontotoc county; as for instance, at Parson 

 Montgomery's (1M36); at Mr Wages', on one of the heads of 

 Okonatyhatchie, S. 18, T. 7, R. 4 E ; at the old mill on Cherry 

 Creek, near the post-office of that name ; on the hill S. of the 

 crossing of Brown's Creek, on the Ellistowu and Pontotoc road, 

 and on the E. slope of the ridge on the same road, in T. 8, R. 4 

 E M (e. g. on S. 21) ; on the branches near the mill on S. 36, T. 9, 

 R. 4 E., E. of Pontotoc, and probably on many of the heads of 

 the Chiwapa, S. of Pontotoc ; at the Baptist church on S. 28, T, 

 lv, R. 3 E., Chickasaw county; etc. While the specimens from 

 these localities appear to contain about the same amount of green- 

 sand as the marl from Wilhite's, their stronger effervescence with 

 acids and greater coherence shows them to be richer in lime. Yet 

 as a general thing, these blue marls are not so limy that an over- 

 dressing of any moderately clayey soil need be feared with any 

 quantity less than 4-to 000 bushels per acre. 



1*5. In Tippah county, at Ripley, and W. of the same, there 

 occurs another kind of marl, generally richer in greensand grains 

 than that just described, and containing few shells not disintegra- 

 ted. The stratum is seen in the outcrops of Kindrick's mill (1FA31, 

 Sec. 12, stratum No. 2), and on Tippah Creek at Ripley (T132, 

 Sec. 13, stratum No. 3); it is also found in wells at the latter 

 place, and is well developed in the outcrops just W. of town, and 

 particularly at Mr. Wernor's place, S. 22, f. 4, R. 3 E., where it 

 is very remarkable for the large amount of greensand it contains. 

 An analysis of rather a poor specimen of this marl, from Mr. 0. 

 Davis' well, at Ripley, gave the fallowing result : 



MARL FROM O. DAVIS' WELL, RIPLEY. 



Insoluble Matter (chiefly coarse Sand) 62.441 



Potash.. 0.730 



So la 0.272 



Lime 7.952 



Magnesia 1.560 



Brown Oxide of Manganese 0.160 



Peroxide of Iron 11.849 



Alumina 5.865 



Phosphoric Acid 0.266 



Carbonic Acid, Water and Lass 9.905 



100.000 



On an average, this kind of marl is undoubtedly superior to 

 Wilhite's, containing as it does, more potash, lime and phosphoric 

 acid. It has already been used with fine effect in the m i^hborhood. 

 of Ripley. — A material very similar to this, is found at the church 

 near Stubbs' (T133, Sec. 15, stratum No. 3), but its quantity is 



