Lowlands, Coasts, Rivers and Lakes Lowlands are younger surfaces usually with sedimentary rocks, although sometimes other rocks form lowlands when worn down. The characteristic problem is drainage. Latin America is characterized by few lakes, many important rivers, and extensive seacoasts bordering both on shallow continental shelves and deep ocean trenches. Lowlands Lowlands in Latin America are underlain by various kinds of rock. Of special significance for human use are loess, limestone, and the mixed sedimentary covers of the interior lowlands of South America.
Drainage can be a problem.
Boring landscapes, but great for wheat and cattle. Limestone Limestone is made of calcium-rich parts of sea animals. In USA, it is found in Texas. Surface water can be hard to find. Erosion can be a problem.