1 Brazil nuts contain high levels of minerals such as selenium, magnesium, copper, manganese, potassium, calcium, iron, phosphorus, and zinc. 2  Magnesium is a key nutrient in a whole host of biological processes. Dark, leafy greens are rich sources of minerals, but spinach in particular contains an abundance of magnesium, calcium, potassium, manganese, and zinc.
There are three kinds of plate tectonic boundaries: divergent, convergent, and transform plate boundaries. This image shows the three main types of plate boundaries: divergent, convergent, and transform. Image courtesy of the U.S. Geological Survey.
There are three types of plate boundaries. One type of plate boundary is a convergent plate boundary . A convergent plate boundary is when two or more tectonic plates come together and collide. Convergent plate boundaries are destructive boundaries because one plate and it's crust are recycled. A second type of plate boundary is divergent plate boundary .