Why would carbon dating not be a useful way to date coelopyhsis fossils?

Carbon dating is not useful for dating coelophysis fossils because this method is effective only for organic materials up to about 50,000 years old. Coelophysis lived during the Late Triassic period, approximately 210 million years ago, far beyond the range of carbon dating. Additionally, fossils are typically mineralized and do not contain the organic carbon necessary for this dating technique. Thus, other methods, such as radiometric dating of surrounding volcanic layers, would be more appropriate for determining the age of coelophysis fossils.