Monday, July 24, '99. Of the upper part of the Richmond section of the preceding section, in preceding page is equivalent to the Madison then the Lamar Silurian age of the Madison is abundantly proved by the many Siren Dolo mite fossils. This is however very unlikely, since farther west, there where the river after flowing a little north I next turns north, and after 2 miles reaches the mouth of Wolf Creek. The Madison is seen well exposed, the basal thick bedded layers and the overlying thin- bedded layers being just as character- istically developed as in any pre- vions section. It is very unlikely that in such a short distance the Madisi on beds should leave entirely but their characteristic features, and then have resumed them again a short distance farther on. This is the section at the bend of the river 2 miles S. of Wolf Creek: Base of Black Shale 620. Black Shale. 25 feet Madison beds- thin bed- ded. massive 28 ft. Richmond beds withs at top. Sastergords at very base. 28 10 5 Monday July 24, '99 V5 The Madison continues to be ex- pessed in well recognizable form up the river as far as within 3 miles of Green or Drown bar.