National Geographic : 1900 Dec
454 THE WYOMING FOSSIL FIELDS EXPEDITION face of the bluff was nearly covered with collectors, and chips and fragments of stone were flying in all directions, to such an extent, indeed, that it was uncomfortable and almost unsafe to remain in the vicinity. The men labored long and hard, and, while most of them returned to supper, some became so enthusiastic as to forget their meals, until darkness compelled their return to camp. That night the camp fires along Cooper Creek burned brightly, and the stimulus gained by a successful afternoon's study and work engendered a feel ing of mirth and jollity that broke forth in story-telling and college songs. The next day being Sunday, camp was not moved. The wagons, however, were placed at the disposal of the members of the expedi tion, and many of them drove to the Medicine Bow Mountains, which were only five miles distant, and climbed to snow-line, played snow ball, and wandered in the pine forest until they came in contact with an area of fallen timber, through which they did not wander to any extent. The sunshine and dry atmosphere had begun to tell on the noses and lips, and to some extent on the cheeks, of nearly all. From Camp No. 2 the trail crossed Dutton Creek, passed some local coal-mines, and then followed down Rock Creek, where the topog raphy reminds one more of an eastern valley than of a mountainous country. By the fifth day out the expedition had collected two tons of fossils, which were chiefly invertebrates and fossil leaves. On the arrival of the expedition at Como Bluff, rendered famous by the work of the late Professor Marsh, enthusiasm was unbounded. It was from this locality that Yale University received its largest amount of dinosaur material. The bluff rises to a height of 200 to 300 feet, and parallels the Union Pacific Railroad for five or six miles, being south of the track, and nowhere over half a mile away. It is capped with conglomerate, and just below this band are the dinosaur beds of variegated marls and clays, plainly visible from passing trains. From these beds Professor Marsh secured his largest dinosaurs, which not only made him famous, but gave Wyoming the distinction of possessing geological graveyards containing fossil remains of the largest land animals that have ever inhabited the earth. The mem bers of the expedition were successful in finding a great many dino saur bones, and some opened quarries that gave promise of being very valuable. The time spent at this point, however, was so short that there was no opportunity to remove marls enough to investigate even partially the many finds.