A small oceanic plate borders the North American Plate along northern California, Oregon, and Washington. As a result of this plate boundary, the Pacific Northwest contains a volcanic mountain range known as the Cascades. Cascade volcanic mountain range along the west coast of the United States, spanning northern California, Oregon, and Washington.
Based on the volcanic mountain range shown on the map, describe the motion of the plates and identify the type of plate boundary in this region.

Why might a single rock layer exhibit different types of sedimentary rocks within it? view available hint(s) why might a single rock layer exhibit different types of sedimentary rocks within it? such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed in a sequence over time. such a rock layer, termed a facies, when traced laterally represents a single depositional environment that formed over time. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed in a sequence over time.