leaving only beds of pebbles etc. In the bluffs east of camp where our informants, messrs Carpenter and Baker had indicated fossils on the map and told us they stood out prominently in vast numbers, we found only peculiar concretions, several inches in horizontal diameter and sometimes several feet in vertical dimensions, forming all sorts of peculiar shapes and sometimes running into each other, weathering horizontally into terraces of from 2 to 10 feet in height and vertically into fantastic shapes, often resembling bones of large animals. They are much harder than the formation in general and the terracing suggests their segregation by waters moving along planes represented by the terraces. True bedding planes are not noticeable where the formation has become entirely concretionary and even in many other places the formation is massive, but in other places it is well stratified. We returned to camp
