The map of rock distribution in the textbook shows have the most extensive occurrence at the surface of the continental united states, and more broadly, the world?

Geographers explore both the physical properties of Earth's surface and the ... The term "geography" comes to us from the ancient Greeks, who needed a word to ... navigation facilitated more exploring, greatly improving the accuracy of maps ... Studies of the geographic distribution of human settlements have shown how ... hope i helped

Explanation:

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.