"Sidney Poore, at mine plant 250' from the top of the Tresmus south of Fort Peora, 1 mile of Marathon 6 miles. There were sent to D. White who reported to Profss as follows: Best plant is Lepidodendron Atratum, that is characteristic of the Pottsville." An Aristia (one in the Cordale), a Cardiocarpus and a Calamites, all undetermined. "As a basis for the age correlation of the sandstone Tresnus formation at Marathon, Texas, the fossil fragments you sent are hardly sufficient, but the determined range of L. atratum in different parts of the United States is, after all, so limited as to leave little doubt that the fossils are of Pottsville age. The phase of Lepidodendron as here shown points more closely to the upper rather than to the middle division of the Pottsville." "The sandstone belongs with more probability to the base of the Aegidolema group of our Division, similar strata with the same species have been gathered from the base of the Aegidolema at the coal pits of Jocono, Our Meskeras, and in the orocinial (Lander formation) outcrops the crystallines, about 6 miles early Altanguique. Also in Peora Valley early Dante Co." "Not later than Sharon " Possibly as old as the Bland " Learn at present to Sharon.