Which block is located west of the San Andreas Fault zone and east of the Nacimiento Fault Zone?

The Salinian Block is the correct answer because it is a distinct geological block that is positioned between the San Andreas Fault zone to the east and the Nacimiento Fault Zone to the west. This block is primarily composed of granitic rocks and is part of the larger geologic framework of California.

Understanding the Salinian Block's location is crucial in the context of tectonic and geological studies in California. It represents a portion of the crust that has been displaced northward by the motion along the San Andreas Fault system. This displacement has resulted in the unique geological compositions found within this block, characterizing its composition and contributing to the overall understanding of California's geology.

In contrast, other choices refer to different geological features or formations that do not fit the specified location. The Southern California Batholith is a large, igneous rock formation found primarily to the south and east of the San Andreas Fault. The Santa Ynez Fault is situated further to the west and does not delineate a specific block. The Transverse Ranges Basement refers to a series of complex geological structures that do not fall within the specified boundaries of the question. Thus, the Salinian Block stands out as the only option that specifically meets the criteria of being west of the San Andreas Fault and