Along which type of plate boundary are the most dangerous explosive volcanoes located

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?

In wegener’s evidence for continental drift, continents were proposed to fit together, such as the east coast of south america with the west coast of europe. east coast of africa. west coast of greenland. lower west coast of africa.

According ti the following map, what are the most common mineral resources found in the united states?