Since the moon and the Earth probably formed at the same time, this supports the current idea of the Earth's age.
You can learn more about fossils, dinosaurs, radiometric dating and related topics by reading through the links on the next page.
– Sediments are complex systems containing carbon of multiple forms, sizes ranges and sources.
Please contact us to discuss the nature of your research objective to ensure the most appropriate pretreatment of your sediment sample.
Fossils, however, form in sedimentary rock -- sediment quickly covers a dinosaur's body, and the sediment and the bones gradually turn into rock.
While the oldest known rocks on Earth are about 3.5 billion years old, researchers have found zircon crystals that are 4.3 billion years old [source: USGS].The universe is full of naturally occurring radioactive elements.Radioactive atoms are inherently unstable; over time, radioactive "parent atoms" decay into stable "daughter atoms." When molten rock cools, forming what are called igneous rocks, radioactive atoms are trapped inside. By measuring the quantity of unstable atoms left in a rock and comparing it to the quantity of stable daughter atoms in the rock, scientists can estimate the amount of time that has passed since that rock formed.Sending wet or frozen samples for radiocarbon dating is fine.The lab starts the analyses immediately upon arrival of the sample so moisture will not induce contamination.By dating these surrounding layers, they can figure out the youngest and oldest that the fossil might be; this is known as "bracketing" the age of the sedimentary layer in which the fossils occur.