54 



LOWER EOCENE FLORAS OF SOUTHEASTERN NORTH AMERICA. 



Section at Henderson pit, one-half mile iiDrtliuest of Benton. Ark. 



Foot. 



1. Brownish loam carrying roarse gravel 1-3 



2. Very irregularly bedded, brick-red, ease-hardened sand, with clay lamina;, grading into No. 3. 4-8 



3. Gray to buff, ver\- argillaceous sand or arenaceous clay, in pUu-es grading into No. 4 4-8 



4. Massively bedded, bluish to brown plastic clay with numerous leaf impressions: exposed 4 



This locality is on tho strike a short distance I'liidontifiable leaf fragments occur n<^ar th(( 



north of the section from the McDonald jiit (l(^- base of bed No. 1. The old colh^ctioiis, not 



scribed on page 53. Bed No. 4 has yielded the jjreviously studied, have fm-nished specimens 

 following plants: 



A pocynophyllum constric turn. 

 ApocjTiophyllum sapiiidifolium. 

 Caesalpinites bentonensis. 

 Cassia licntonensis. 

 Cas.sia fayettensis. 

 Chamiedorea danai. 

 Engelliardtia etting.<hauseni. 

 Myrcia bentonensis. 

 Nectandra pseudocoriacea. 

 Oreodaphne salinensis. 

 Oreopanax oxfordensis. 

 Sabalites grayanus. 

 Sapindus bentonensis. 

 Sapiudus knowltoni. 



Compared with the eastern Gulf area the 

 flora from Benton contains 5 species of im- 

 kno^vnt position, 2 species that range from the 

 base to the top of the Wilcox, 1 species con- 

 fmed to the Ackorman fomiation or lower Wil- 

 cox, 2 species confined to the Holly Springs 

 sand or middle Wilcox, 4 species confined to 

 the Holl^~ Springs sand and Gnuiada formation 

 or ui)p(ir Wilcox, and 1 species confined to the Light-pinkish clay 



Grenada fonuation. It is therefore not older Wliite sand 



than the leaf -bearing outcrops of Henry Coimty, 

 Tenn., which are in turn slightly younger than 

 those of the Holly vSprhigs sand or middle Wil- 

 cox of northern Mississippi. 



of Oreixlapline salinensis Berry and Sophora 

 wUmxifina Berry. 



OT*ACJIITA COL'NTY. 



Owen,' in his second report, gives special 

 attention to the ligni o of the Camden Coal 

 Muiing Co. in Ouachita County (sec. 12, T. 

 12 S., R. IS W.). He gives" the foUowuig 

 section : 



Section at mine of Camden Coal Mininr/ Co., Ouachita 

 County, Ad-. y^^^^ 



Sand and ferruginous sandstone 20-30 



Ash-colored clay (»- 7 



Lignite C 



Pipe clay with segregations of limonite. 



Light-gray sandy clay, somewhat ferruginous 10-18 



Harris,- who revisited this locality, records 

 tlie following section (exposed at tlie time of 

 his visit: 



Section at mine of Camden Coal Mininy Co., Ouachita 

 County, Ark. 



.Vrenaceous materials, poorly exposed. Feet. 



(i 







Bluish clay 8 



Lignite G 



The lignite is reported to be without sand 

 or cliiy aitd evidently represents an interval of 

 emergence. Impressions of leaves are said to 

 occm" in the vicinity (sec. 14, T. 12 S., R. 18 

 Fossil plants were collected by the Arkansas ■\;\r ) i^ .^ sandy ferruginous indurated matrix, 

 Geological Survey a score of years ago from the \^^^ j ij^ve seen nothmg identifiable from this 

 Atchison clay pit, about half a mile east of the re"-ion, either in the field or in tlie Nal ioiud 



MALVERN, HOT SPRING COUNTY. 



St. Louis, Iron Mountain & Soutliern Railway 

 between Porla and Malvern in Hot Sprmg 

 County. 



In tliis part of the State tlie clay lenses of 

 the Wilcox are small and are embedded in tho 

 sands. They make the cores of the small hills, gj^^j., 

 Wlien one is worked out another is opened, so ^^ 

 that the original locality was not exposed at 

 the time of my visit. The workhigs ui 1910 

 showed tho following section: 



Section at Atchison clay pit near Malvern, Ark 



1. Gray to drab, somewliat sandy clay, becoming 



brownisli and lignilic at the base 0-6 



2. But'f to gray plastic clay 2-8 



3. Gray to buff sand 0-5 



Museum collections. 



SECTIONS IN LOUISIANA. 

 SHREVEPORT, CADDO PARISH. 



A section at Slaughter Pen P.hill' 

 eve]iort, La 



Lerch, 



near 



has been discussed liy Jolm- 

 Vaughan,'^ Veatch," and Harris.' 



Feet. 



> Owen, I). I)., Second report of a geological reconnaissance of the 

 middle and .southern counties of Arkansa.s, pp, 12.s-i:i3, ISOO. 



2 Harris, G. !>., Arkansas Geol. Survey -Mm. Kept, for 1S92, vol. 2, 

 p. 63, 1S94. 



> Jolmson, L. C, Report on the iron regions of norlhom Louisiana 

 and eastern Texas: n. E.v. Doc. No. 19.'), .Wth Cong., 1st sess., p. IS, ISSS. 



< Lerch, Otto, Louisiana E.xper. Sta. Bull., 1S92. 



' Vaughan, T. W., Am. Geologist, vol. 13, p. 205, 1S9.''). 



« Veatch, .V..C., Louisiana Gool. Survey Kept, for 1><9'J, p. V."'), 1900. 



' Harris, G. D., U. S. Geol. Survey Ball. 429, 1910. 



