Marathon March 17-1924. Monday. In the afternoon explored along the road going south out of Marathon. Just beyond the dunes to the east of the road may be seen Virga shales with an occasional zone of sandstone, but once then followed lighter blue lithographic limestone. Among them is a thick zone of light gray sandstone or limestone composed of intraformational conglomerate. Most of them have flat limestone pebbles up to 6 inches long. Some near them are thinning out until the pebbles all angular and crushed together. Fossils are exceedingly scarce, always small and in my opinion beds that are once low crystal-line. In these occur Leptitites perfectly smooth and very small, Palmanella testudinaria, Lingulae very small, elongate and almost smooth, pieces of a residual gastrolite (?Dicellograptus), and exceedingly delicate Buthothyrus-like plants. Also some fragments of trilobites more distinct than any other. These beds stand nearly vertical at 80 degrees.