Which phrase describes the absolute age of a rock

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

Earthquake waves that vibrate from side to side and up and down only through solids are known as "seismic waves."hope my answer has you : )