Tectonically active areas frequently have steeper topography due to the faulting and mountain-building.  Any place with a hillside has the potential to slide downhill! The hazards that characterize a divergent plate boundary include faults, earthquakes, and volcanoes. Your book discusses more evidence that was used to support seafloor spreading and Plate Tectonics, please read about that if you are interested (you will not be tested on the evidence that I didn’t cover in class).
If you look carefully at the Mid-Atlantic Ridge on this map, you will see that the youngest ocean rocks (red) are found right along the ridge and the rocks get progressively older away from the ridge – 160 to 180 million year old rocks (dark blue) next to North America and northern Africa and 83 to 118 million year old rocks (green) next to South America and southern Africa.


Looking in the Atlantic Ocean, why aren’t the seafloor rocks found next to South America and southern Africa as old as those found next to the U.S. It turns out that divergent plate boundaries do not build up as much energy as do convergent and transform plate boundaries. Or you can think of it this way, it takes less energy to cause the warmer spreading center faults to break, so they tend to break more easily and in smaller segments. This is process characterizes all divergent plate boundaries and is called Seafloor Spreading.


The plate boundary occurs at the trench, but the whole zone includes the trench as well as the areas affected by the subduction (earthquakes, volcanoes, mountain ranges).



Disaster survival kit checklist
Fema (federal emergency management agency) is part of this branch of government
What is it service continuity planning


Comments

  1. 27.07.2015 at 15:53:41


    Actually, truly heavy shielding, they are going distinct the terms in this section day-day.

    Author: Dj_Perviz
  2. 27.07.2015 at 12:53:53


    Big-scale accidents can are the exception.

    Author: Ayshe