Final answer:
The Pacific Plate was moving northward between 70.7 and 43.3 million years ago, which is evident from the movement along the San Andreas Fault in California.
Step-by-step explanation:
The general direction of movement of the Pacific Plate between 70.7 and 43.3 million years ago was northward. This movement is a result of the dynamic interactions at the boundary between the Pacific Plate and the North American Plate. The San Andreas Fault in California, for example, exhibits this northward movement of the Pacific Plate as Los Angeles and other southern California areas are carried along with it. The plate's motion has been contributing to significant geological changes, including the potential future positioning of Los Angeles as an island off the coast of San Francisco.