the midcontinent rift system (mrs) extends for over 2,000 km in the upper midwest of the united states…

the midcontinent rift system (mrs) extends for over 2,000 km in the upper midwest of the united states. scientists shows three of the major rock types along the mrs. which statement explains the distribution of rocks along the mrs? the distribution of rocks along the mrs follows the path of an ancient river from over a billion years ago. the distribution of rocks along the mrs indicates the locations of active volcanoes in the united states. the distribution of rocks along the mrs is a result of weathering and erosion from nearby mountains. the distribution of rocks along the mrs is a result of past plate tectonic activity in the region.

the midcontinent rift system (mrs) extends for over 2,000 km in the upper midwest of the united states. scientists shows three of the major rock types along the mrs. which statement explains the distribution of rocks along the mrs? the distribution of rocks along the mrs follows the path of an ancient river from over a billion years ago. the distribution of rocks along the mrs indicates the locations of active volcanoes in the united states. the distribution of rocks along the mrs is a result of weathering and erosion from nearby mountains. the distribution of rocks along the mrs is a result of past plate tectonic activity in the region.

Answer

Brief Explanations:

Rift systems are formed by plate - tectonic activity. Igneous rocks in rifts can be due to magma movement related to plate separation, and sedimentary rocks can accumulate in the rift basins formed by tectonic subsidence. The other options are less relevant as there is no indication of an ancient river path determining rock distribution, the MRS has no active volcanoes currently, and weathering and erosion from nearby mountains are not the main cause of rock distribution in a rift system.

Answer:

The distribution of rocks along the MRS is a result of past plate tectonic activity in the region.