The island of Hawaii is the youngest, and the islands get progressively older to the northwest. Plate tectonic theory explains this as

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).

Answergovernment control over all imports and exports;