Question

.please help me!!! Radiometric dating does not usually work with sedimentary rocks because they _____.

are too old to be accurately dated

form too quickly to be accurately dated

never contain particles of radioactive isotopes

form from many older rock particles

Answer 1

Sedimentary rocks can be dated using radioactive carbon, but because carbon decays relatively quickly, this only works for rocks younger than about 50 thousand years. So in order to date most older fossils, scientists look for layers of igneous rock or volcanic ash above and below the fossil.

Answer 2

I believe it is the last one.

Radiometric dating usually does not work with sedimentary rocks because they form from many older rock particles.

I hope this helped you a bit. :)