Question

Based on this evidence, do you think it is possible that the Jalisco Block is moving?

a) Yes
b) No
Based on the evidence you just analyzed, what type of plate motion do you think is most likely causing the patterns of volcanic activity and earthquakes in this area?
a) Divergent movement of the Jalisco Block away from the North American plate at the TZ Rift Zone
b) Convergent movement between the Jalisco Block and the Rivera Plate
c) A and B are equally likely

Answer 1

Yes, the Jalisco Block is likely moving due to tectonic activity, with convergent movement between the Jalisco Block and the Rivera Plate being the most probable cause for the patterns of volcanic activity and earthquakes observed. Different types of plate boundaries and rates of motion affect regional geology and volcanic behavior.

Step-by-step explanation:

Taking into account the geographical evidence and fundamental principles of plate tectonics, it is conceivable that the Jalisco Block is moving. When evaluating the patterns of volcanic activity and earthquakes presented in Figures 1.4-1.5, one might deduce that there is a tendency for tectonic plate motion in the surrounding areas. The divergent and convergent boundaries near the zone suggest significant tectonic activity. Particularly, the convergence between the Jalisco Block and the Rivera Plate can result in seismic and volcanic phenomena.

Furthermore, considering the rates of plate motion in the North American plate's hotspots, the Yellowstone and Anahim, we can observe that their distinct rates and directions of movement underscore the complexity of tectonic processes that may not reflect a completely rigid North American plate.

Examining the rate of motion along hotspot tracks and comparing volcanism between Yellowstone and Anahim over identical time spans can provide insights into the dynamic nature of tectonic movements and their impact on volcanic activity. The variations in caldera sizes are also compelling evidence of differing magnitudes of eruptions, which can be influenced by the tectonic evolution and topography of each region. It's evident that the interplay of the plates' motion and the type of crust involved orchestrates the geological behavior at each boundary.

To answer the student's original question: a) Yes, it is possible that the Jalisco Block is moving. The type of plate motion most likely responsible for the observed patterns of activity is b) convergent movement between the Jalisco Block and the Rivera Plate, although other motions may also contribute.