You are dropped off by helicopter at a site on the land. you are told that it is a plate boundary. almost immediately, you feel an earthquake. you look around and note the absence of volcanoes, but you notice an offset stream channel, and find a vertical fault with two kinds of rock on either side of it. what sort of plate boundary are you most likely on?

You are most likely at a TRANSFORM PLATE BOUNDARY. Transform plate boundaries occur where two plates slid horizontally past each other. Since no convergence (subduction) or divergence takes place here, volcanoes are NOT formed at this type of boundary. The main features that occur here are earthquakes, extensive strike slip fault zones, and offset stream channels.
A famous transform plate boundary is the San Andreas Fault in California USA.

The answer is c) people evacuated but almost all returned