PLAXT-BEARINd Ol-TCKDl'S. 53 



Eocene (WiI(-ox group I : Feet, upper part of the section. From bed No. 4 



8. Dark-brown to hla.k lignite 5 Stephenson colleeted the followhig plants: 



i). Brown argillaceous ligiiitic sand 1 



JO. Dark chocolate-colored tough clay, lignitic in Ficu.s ptieuilohncdiai'olia. 



vipjier portion ; in [lUiccs in the ui>per 2 feet Juglans schiniperi. 



contains numerous jjoorly jireserved ligni- PaUeodendron araericanum. 



tized leaves and impressions of leaves 3 Sapindiis mississippiensis. 



11. Very tough, light greenisli-gray clay 2 8o,,hora wilcoxiaua. 



Tlie liij;nitic heil (No. N ) and hcds Nos. 1(1 .i.i 1,1 - ■ 1 ■ . ... 1 



.\ltlioiit,ni t lie nialei lal is \<M'v jioor. several 



and II are soinevvliat irretrnlarlv hedded and r ,1 ■ 1 ,■,• ,■ i- r * 1 



^ • , ol llie ideiil ilicallons are siil istactorv, :ind as 



difler in thickness alono- the hliifl'. In nhices ,• , , .■ 1 1 .{ -ii-i 



... 11 none 01 the lornis are known anove the VV ileo.x 



the upper hgnitic |)<)rtion ol !)(■<! Nil. 10 heeoiiies ■ 11 , • ji * .i • • *! 



■,;-■..■ . , . , It siMMHs reasonnnlv certain tliat this is the iiije 



a heil ol true hoiiitt^ 1 to 2 ieet tliick. A h-w ,.1 1 , ' r ^i <■ ti r -4 



... , ,• • ,. 1- ■ "' 'he lower paii ol the section. 1 he hijnite 



liiTiulized lo"s and traoinentaJ remains of lioni- 1111 ..11 1 



,.' , '^ • 1 • 1 hed clearly repi'esents a local emerirence, iind 



tized stumps were seen m this hiyer. 1 , at "„ , -, 1 r /n 1 



,, ,, , ' , , , , • • w 1- hods Nos. .i to 7 may be ol t laiborne a<r(^ 



(.all ' recorded several lari^i^ upright lig- • 



iiitized trunlvs with radiating roots in beds nr.Niox. .saline cor.VTv. 

 Nos. 9 and 10. A specimen of silicilied woo<i 



from this locality (not in place, ])rol);d)ly from Sevcu-al iiileresling l)ut geiK'raliy poor sec- 

 bed No. 2) was identified by Knowlton - as lions are exposed in tlie vicinity of Bc^nton, 

 Laurinoxyhn hranneri, a sjiecii's originally Sahnc^ County, Ark. 



based on more complete material from the .Mxmt one-half mile nortliwest of tlie town 

 upper Claiborne or lower Jackson of Si. along th(^ military road a local workuig (known 

 Francis County, but it has no weight in i-orre- ;is th(^ M(d)onald pit in 1910) sli(.)ws the fol- 

 iation, since it was obviously reworked in the lowing section : 



Scflion ill McDonuld pit, about mu-htilj inilf northirisl i>J B<nt(iii, .1)7.'. 



Feet. 



1. Heavy gravel 0-8 



2. Stratified, brick-red, i-ase-hardencd, coarse sand or fnn' gravel, MTtli undidaliiig upper and 



lower surface (1-5 



3. Thinly laminated gray sandy clay, with r<-d and yellow mottling, current b<-ddcd and <'on- 



taining thin layers of gravel 0-6 



4. Plastic gray to brownish, heavily bedded clay 2-6 



5. Slightly ferruginous sharp gray sand -l-G 



Mr. W. H. McDonald, who is in charge of tht^ a few feet of brownish siindy clay grading 



Government experunent farm across the road, upward into grayish ;ind jjinkish clays. The 



says that borings show several feet of sand browii clays are packed with ])oorly [)res(^rv(Hl 



below the level of bed No. 5, followed by shell leaves, and some of the material occurs in 



fragments, which seems to indicate the presence matted layers. The most abundant form is 



of fossiliferous Midway deposits at no gi'eat ^4r/orar;m,s- /mftgens (Lescpiereux), in addition to 



distance below the surface, since fossiliferous which the following species have been id(\nti- 



Midway occurs a few miles to the west. No fied: Cas»ia hentonensis Berry, Oreodaphrie 



di^terminable plant remains were found at this salinensi.'^ Berry, and Sfih(iJit(.^ (/rdijdinis- Les- 



outcrop. quereux. 



A small exposure on the property of the About half aniile Jiorlh of th(i preceding out- 

 Eagle Pottery Co., one-half mile west of the crop, at the Lt^tH'h place, on tlu* Pine Blufl' road, 

 preceding section, shows just south of the road the following section is exposed: 



Scftion lit Licch place, nair Jicnton, Ark. 



Feet. 



1. Reddish, line stratilied .sand, becoming srradually buff toward the ba.se. 6-8 



2, Massive lirowii ])lastic clay with dis.seminated bits of lignite but no leaf imiiressions; exposed. . fl 



The old Henderson pit, fi'om which ft)ssil worked in r(H-ent years and is much masked 



plants W(u-e colkH'tcHlby the Arkansas Ceologicid by shunping. It is sonunvhat less tinm half 



Survey a score of years ago, has not been a mile northwest of Benton on the i'ine 



, „ „ „ „ ^_,, , ~rZ ', ', r~! r^ 7. , ,, Blnfl road. The iollowing section is exoosed 



' Call, R. E., The geology of Crowley's Ri(li;c: Arkansas Geol. Sur- » 1 '^" 



vey Ann. Rept. for 1889, vol. 2, pp. SO-SJ, IStll. thore : 



2Idem, p. 250. 



