Alpine, April 7 - 1926 Wednesday. Spent the day 3-4 miles W. of Marathon to Collect prints only in the 'Tesnus', and all that was seen showed that this Tesnus = Saptaul and in all probability the whole of the Saptaul. First collected along the Alpine-Marathon road about 3 1/2 miles N. of Marathon. The strata are well ex- posed in the road ditch in a horizontal attitude, and contain many of green shales with foraminifera. Then crossed country to the N.P.R.R. cut at mile post 580. Here the strata are vertical, shales, conglomerate (above d.b.t.), and lime sandstone. On the south dump of this 580 mile R.R. cut there is a limestone head which Blanchard erected from some fossils. Keyte is said to have many ones. This loose head came out of the railway cut. Then went to the hill about 1/2 mile farther S.W. from mile post 580 to see the unconformity discovered by me two years ago. After much more space are con- ccluded that this angular unconformity is due to upfold and thrusting, producing an apparent uncon- formity. In the vertical strata beneath the unem-