l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I03 



mostly quartzite, although there are sporadic examples of jasper 

 and chert. Jasper and dolomite were used in the four-edged knives. 

 Choppers were made of quartzite and from granite pebbles. Hand 

 liammers are quartzite, granite, and sandstone. Manos and metates 

 are sandstone. Most of these materials could be obtained locally and 

 there are several places on the slopes of the brakes where nodules 

 have weathered out from the formation. At each of these locations 

 there is definite evidence of workshop activities in the form of 

 numerous chips and flakes, fragments from partially completed 

 implements and hammer stones used in the breaking of nodules. 

 Identical scraps and flakes were found in the digging around the 

 basin and on the terrace site, showing that some of the material was 

 carried back to camp and worked on there. Some of the chert prob- 

 ably came from deposits farther east and was mostly imported in 

 the form of completed implements as there is little of that kind of 

 stone in the chipper's debris around the basin. The dolomite is the 

 silicified form generally known as Amarillo dolomite which occurs 

 along the Canadian River and some of its tributaries and which was 

 obtained by the Indians from extensive quarries near Amarillo, Tex. 

 Some of this material undoubtedly was taken to San Jon, possibly 

 in the form of blanks to be fashioned into completed tools at the 

 maker's leisure, as small bits and flakes of it are found in the chips 

 from the occupation areas. Sandstone and granite pebbles are avail- 

 able at numerous places in the vicinity of the basin and other sites. 



One kind of stone used in snub-nosed and other types of scrapers 

 seems to be a silicified sandstone that has actually become a quartzite. 

 It has a characteristically laminated appearance suggestive of shale 

 (pi. 5, center right), but in contrast to that material is very hard and 

 compact. It is of particular interest because flakes, nodules, and 

 implements made from it are abundant at a site lying between Big 

 and Little Tucumcari Mountains a few miles south of the town of 

 Tucumcari. Present evidence is that it was not extensively used 

 elsewhere in the region which suggests a possible relationship between 

 the occupants of the basin area at San Jon and the site near Tucum- 

 cari. This is also indicated by other factors and if contemporaneity 

 should be established it would be of significance in the matter of 

 certain geologic, correlations still to be demonstrated. The source of 

 this material has not been definitely located as yet, but it unques- 

 tionably is in the immediate district. 



The potsherds found in association with the artifacts and fourth 

 type points occur only in small fragments and are not numerous. 



