Vol. IV] ANDERSON AND MARTIN— NEOCENE RECORD 27 



of California. A full discussion of this interesting topic can 

 not be given at the present time, but some suggestions are 

 offered. 



As is partly shown on the areal map of the McKittrick- 

 Sunset district, one of the main effects of the disturbances 

 which produced the transverse faulting is seen in the offsetting 

 of the several formational zones cut by them, with a wide 

 lateral displacement of the northern blocks to the eastward 

 with respect to the others. This lateral displacement is best 

 shown in the abrupt termination of the several belts. The 

 offsetting of the Temblor (Vaqueros) beds is not less than that 

 of the Cretaceous, which is not small, amounting to approx- 

 imately three miles in the case of the Bitterwater fault, and 

 possibly to even more in the case of the Antelope Valley fault. 

 Interesting suggestions are also to be seen in the distribution 

 of the Temblor (Vaqueros) rocks along the line of the 

 Temblor fault and also the minor faults not named. On the 

 other hand the Monterey shales, as mkpped on the McKittrick- 

 Sunset sheet, show no appreciable offsetting on some of these 

 faults, while on others they do. In the case of the Temblor 

 fault the Monterey shales are overlapped by later, perhaps 

 Etchegoin beds, and if there is any offsetting it is obscured or 

 hidden. On the Bitterwater fault there is no offsetting of the 

 Monterey, and this is known to be the case on the Antelope 

 Valley fault, or on its projection westward beyond the bound- 

 aries of the map. 



It would appear from these observations that the faulting 

 and offsetting of the formations took place chiefly during 

 middle or early Miocene time, after the deposition of the 

 Temblor beds and prior to that of the Monterey shales, though 

 some similar movements may have occurred since. 



Similar facts of discordance, and other corroborative evi- 

 dence of this order, are to be observed in other parts of the 

 Temblor basin and in districts outside of it, as will be shown 

 later. The displacement of the Cretaceous and the Temblor 

 on the Antelope fault and other eccentricities and discordances 

 of stratigraphy and sequence emphasize the individuality of 

 these several orogenic blocks. North of the Antelope Valley, 

 the Tejon, upon which the Temblor appears to rest con- 

 formably, is well developed. South of the Antelope Valley 



