Note 26 — Regular Meeting, May 21st, 1866.

On Professor Hall’s Map “illustrating the general geological features of the country west of the Mississippi River,” which accompanied Emory’s Mexican Boundary Report, and was published in 1857, all of a broad central strip running along the parallel of 40° through the center of Nevada, is colored as “lava and other igneous rocks,” while the western portion of the State has several broad belts of “Upper Carboniferous Limestone,” running north and south across it from Walker’s Lake to Goose Lake. So far as I know, no Carboniferous fossils have yet been found in that part of Nevada.