A regional soil-forming process in tropical and subtropical environments that results in extensive eluviation of minerals except for iron and aluminum is

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

Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.

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