brucites and calute removed but the fault is asssm'd about as similar. These coarse sandstones (2 ft thick) nearly Evein feldsparine nephritic beds and similarly some thin shales; in the latter a few minutes search failed to reveal any fossils. About 75 yards N.W. of 5.1.8 A. and about 250 yards N.W. of the Confl. there occurs a fault trending N. 45° E. whereby the shales underlying 5.1.8 B abut against Glassy Rhyolitic tuffs containing fossils. These tuffs are the same layers that underlie 5.1.8 B.; the uppermost is in the N.W. side and appears to be about 20 ft. For exposure, a scale ner soft thick includes a cliff of glassy Rhyolitic dust flops, dark colored, of a grayish and a dark blue color and containing fossils in abundance as several Calcareous shams = 5.1.8 B. A 5" calcareous seam with numerous numbers of ?Pentacrinus? ?Potyichismis? and a few Lamellibranchs (Goniom myia, radiiceps?) is a conspicuous feature. A few smaller 5.1.8 B's underlie the same feature in somewhat slaly portions. A few inches below this bed and includes a rare Gromptera cupulata and an abundant variety of Lyrochites. 5.1.8 B includes Platyssoma album Bellogophon trilobatus common ? acutis occasional Grammygia cupulata " Modioprodis 5.1.8 C is the sandstone 3 feet thick underlying 5.1.8 Rhyolitic glassy tuffs and as the same lands as 5.1.8 D. It yielded the same fauna as 5.1.8 A with the relative of Grommygia cupulata. Fossils were a little more fragment. The strike of 5.1.8 B, B² C as N.35° W gradually ranging around in the course of 100 yards N.W. so that at the junction of 5.1.4, 5,7,8 the strike is N. 40° W. The dip is 20° N.E. In the little rose in the extreme S.W corner of 5.1.5 a couple of 1 foot shales of blue clayey shale crop out in tall grass. Strike N. 40° W / dip slight (perhaps 15°) to the N.E. About 100 yards to the northwest there occurs in the S.E. part of 5.1.4 a long cliff of dark blue glassy thick Rhyolitic dust in 8 to 10 inch slate separated by thin or thick seams of thin gray shale or thin coarse grained tuffs, with feldspar of phenocrysts - there are also some gray Rhyolitic shales. About 18 ft. and Exposed striking N. 27° W. and dipping N. 60° E., 20° a little fault of trending N. 100° W and well an upthrow of 1 ft on the west is also included these Rhyolitic tuffs include a few seams full of fossils chiefly Platyssoma, and Lamellibranchs (Gianomyia Modiolespids) with some Bellogophon radiiceps (not collected). One of these layers is a 5 inch limestone or rather calcareous sand full of Platyssoma album and as the saline layer noted p. 38 under 5.1.8 B. Proceeding upward and downward in this section, after a covered gap 70 yards wide we come to a promontory of hard fine grained Rhyolitic tuffs which project on a long ledge striking N.40° W. and including a little wooded island a couple of hundred yards S.E. of the above at high water. 18 ft. of hard glassy Rhyolitic fine grained tuffs appear dipping N.50° E. at an angle of 22°. The rocks are thick beds two feet or more, thick in the upper part with frequent inclusions of 2 inch bands of coarse grained layers bearing feldspars.