Question

IRadiometric dating does not usually work with sedimentary rocks because they _____.


form from many older rock particles


are too old to be accurately dated


form too quickly to be accurately dated


never contain particles of radioactive isotopes

Answer 1

Radiometric dating does not usually work with sedimentary rocks because they **form from many older rock particles**. Sedimentary rocks are composed of sediments that come from the erosion and weathering of pre-existing rocks, which means they often consist of fragments of various ages, making it difficult to determine an accurate date for the rock as a whole.