ao3 LiGNiTic Stage h 



In m)^ report on the Tertiary of Arkansas, I have referred 

 the greater portion of Grant, Dallas, Ouachita, Nevada, Col- 

 umbia and Miller counties to the l^ignitic stage. This I was 

 induced to do by the presence in many places along the Cre- 

 taceous border of thin Midway deposits, and the presence of 

 Lower Claiborne fossils in the northern Bossier, Webster, and 

 Claiborne parishes in Louisana, and at Walnut bluff, Oua- 

 chita county, Arkansas. Farther east, in Cleveland and Jef- 

 ferson counties, the Jackson with possibly some Claiborne beds 

 approaches rapidly the Cretaceous border. It was pointed out 

 that although beds of Lignitic age do exist in Arkansas, between 

 these Midway and Claibornian deposits, exact lines of demarc- 

 ation cannot be drawn. A general idea of their distribution is 

 indicated by the map accompanying that report. Some of 

 the typical localities on or near the Ouachita were described 

 in Ann'l. Rep't. Geol. Sur. Ark., 1892, vol. ii. The old coal 

 mine spoken of by Owen, on section 12, 12E, 18W, was visited 

 and the following fadls noted : 



Mr. Richmond Hibbard who resides at that place says it is 

 in the northeast quarter of the above sedlion. The following 

 outcrop is at present visible : 



SeBion at the old mine of the Camden coal compa7iy, Oua- 

 chita county, Arkansas. 



Arenaceous material, not well exposed 



Light pinkish clay 6 feet 



White sand 6 feet 



Bluish clay ••••• 8 feet 



Lignite 6 feet 



The bed of lignite here represented is unbroken by sand or 

 clay partings, but vertical joints passing in a north-northwest, 

 and south-southeast direcflion, stained with iron oxide are num- 

 erous. Its color is more nearly that of true coal than that of 

 any other lignitic deposit seen by the writer in the State. It 

 is generally dull black, though streaks from one quarter to 

 three quarters of an inch thick, of hard shiny matter are not 

 uncommon. 



There is a new opening into this bed, in 12S., 18W., sec- 

 tion 14, the northwest quarter of the southeast quarter, which 

 is, according to Mr. Hibbard, very nearly or quite on a level 



