In the late 1800's the United States government took a new approach towards Native Americans. What was this new policy?

In 1887, after several years of debate and controversy, Congress passed the General Allotment Act, or “Dawes Act,” and President Cleveland signed it into law. The goal of the policy was to break down tribal relationships and hasten Native assimilation into mainstream society.

Explanation:

According to www.nationalgeographic.com, "In the mid-19th century, the U.S. government pursued a policy known as "allotment and assimilation."

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

not really sure i needed the points. sorry