488 



AXXALS OF THK CaRNEGIK MuSEUM. 



and quite hard sandstone. The fossils are embedded in softer matrix 

 in a stratum of approximately twenty inches vertical thickness. The 

 bones are sometimes found to be slightly crushed, but on the whole 

 the material is in a very fine state of preservation. 



During the season of 1905 the party uncovered an area of 45 x 20 

 feet in the ({uarry. This area was plotted out in squares five feet in 

 dimension, and a diagram (see Plate XXI.) was made representing this 

 arrangement. The bones are found mostly disarticulated, much mixed, 

 and thickly distributed through this layer of sandstone. It was soon 

 discovered that the most intelligent way in which to secure this tangled 



Fig. I. View of the two rounded liills wliere the Agate .Spring F^ossil Quarry is 

 located. 



mass of material was to take out blocks of sandstone which contain 

 the fossils. On the diagram the more important specimens are always 

 indicated, as are the areas in the quarry where the bones are less 

 abundant, and the numbers correspond to every package. Thus 

 an intelligent idea of the various features of the quarry may be had at 

 any time. The sketch is of importance in connection with the work 

 in the laboratory. By this system of carefully indicating the relative 

 size, shajje, and position of each block, the correct association of the 

 parts of any articulated skeleton, which may be found in this great 

 mixttu^e of bones, will be ])Ossible. 



