PLAXT-BEARIXG OUTCROPS. 



41 



Deep wells arc ]iirkin<; ihroui^hoiit l.afay(>tit'(' 

 County. The only record tluit I can lind is 

 that of the city well at Oxford, given by Cridor 

 and .lohnson ' on the aiithority of W. N. Logan 

 and ^V. R. Perkins. It furnishes a welcome 

 addition to the surface ex])osures in this vicinity, 



Section of 



Wilcox at 



Oxford, Miss. 



00 



Sand 

 and 

 clay 



Clay 



Clay 



.Sand 



1 to 6 from section exposed 

 in ravine 



(ci) Continued downward 

 from city well record 



Figure 2.— Section of Wilcnx deposits at Oxford, Miss. 



and sliows tliat the Wilcox has a niiiiiniuin 

 thickness of at least oOO feet at this ])(>int. 

 The record is as follows : 



Record nf cit'i veil al Urfortl. .\tisn. 



('I;u ami sand 



Sand 



(lay 



Soai)st(ini' (clay I 

 llanl sand.-itono. 



Feet. 

 . 90 

 . to 

 . 17 



.50 



' Crider, A. F., and Johnson, L. C, U. S. Geol. Survey Water-Supply 

 Paper 15'.l, p. Co, 1900. 



In ligure 2 is given a diagram of the section 

 as nuvisured in the ravine north of the court- 

 house, together with the downward contijiua- 

 tion of the beds as shown in th(>. record of the 

 city well. 



IIOI.I.V SI'lilNG.S, MARSHALL COUNTY. 



Botli tlie potteries at Holly .Springs obtain 

 their clay from n(>ar-by exposures in tlie same 

 liill al)out 11 miles cast of tlie town. The 

 small op(Miing an the south slope of this hill 

 shows the following sequence of materials: 



Secliiiii (ij Ilolhj Sprinys sand al Iloih) S/trings, Miss. 



Feet. 



J. Brownish .sandy luam; about 5 



2. Gray sandy clay bocoming purer, more distinctly 

 bedded, and darker toward the base, where it 

 carrie.s fnndy i)r(werved impressions of leaves; 

 exposed JO 



The leaf-bearing portion is 1 to 2 feet thick 

 and is underlain by more sandy materials. 

 The following species occur here: 



Anacardites marshallensis. 

 Bumelia lanni^inosafolia. 

 Cffisaliunia wilcoxiana. 

 Caesalpinitos niississippiensis. 

 Canavalia eucenica. 

 Capparis eoceniea. 

 Cassia emarginata. 

 Cassia fayettensis. 

 Cassia wilcoxiana. 

 Cedrela wilcoxiana. 

 Cinnamonnnn oljovatus. 

 Cinnaraomum vera. 

 Citharexylon eoligniticiim. 

 Dillenites serratus. 

 Dryophylhim tennesseensis. 

 Drypetes prelateriflora. 

 Engelhard t ia et tingshausen i . 

 Ficussp. 

 Ficus myrtifolius. 

 Gleditsiophyllnm entadalormis. 

 Gledit.''io]ihyllnni fructuosum. 

 Guettardaelliplicifolia. 

 Lsigunciilaria ])r<'racpmo8a. 

 Nectandra pseudocoriacea. 

 Oreodaphne ini.ssissippiensis. 

 Oreodaphne obtusifolia. 



