1 913 J Stoner: Pleistocene Bone Deposits of Bancho La Brea 389 



edges of the asphalt pool were usually irregular. At some points 

 the deposit of elay overlapped the asphalt, at other places the 

 asphalt was forced into the surrounding matrix. 



At a depth of from ten to twelve feet this pocket reached its 

 maximum area. From this depth to seventeen feet it contained 

 only few bones. From eight to twelve feet the floor of the 

 pocket was a tangled mass of bones closely pressed together and 

 interlocked in all possible ways. At this horizon there were 

 exposed at one time two horse skulls, a sloth skull, a camel skull, 

 and several tiger and wolf skulls, besides many other bones of 

 these animals. 



Locality 2051 1 . — The largest part of the material was obtained 

 at this locality in 1912. The locality as shown in plate 18 

 includes three separate pockets, which were completely excavated. 

 In pocket no. 1 the University had worked before and had taken 

 bones from a small hole carried to a depth of twelve feet. From 

 this exposure the work was extended, and two other pockets 

 immediately to the east were located. 



The siirface at locality 2051 was covered with a hard, black 

 asphalt, the tar having flowed out over the surface of the bones 

 and collected sand and elay, forming a capping for the bone 

 pockets. This capping contained a few bones and some vege- 

 table material, and varied in thickness from a few inches to four 

 feet. It completely covered the three bone-bearing pockets. After 

 the hard surface was removed, the bones were exposed in patches 

 as shown in plate 18. As was noted in locality 2050, the bone 

 pockets were relatively narrow at the top. As deeper horizons 

 were reached the pockets widened out, and in plate 19 the largest 

 horizontal section of the pockets is shown. It is interesting to 

 note here that the bone pockets, even at their greatest extent, are 

 not at any point connected. In the study of plate 20, which is 

 a vertical section of this locality, the three distinct bone pockets 

 are shown separated by the green and brown clays. The per- 

 sistent separation of these three pockets, which accumulated 

 within a short space of sixty feet and still remained distinct 

 from one another, may be explained by slow exudation of the 

 oil which did not allow the pools to overflow and unite 

 i The former number of this locality was 1059. 



