By examining the object's relation to layers of deposits in the area, and by comparing the object to others found at the site, archaeologists can estimate when the object arrived at the site.Though still heavily used, relative dating is now augmented by several modern dating techniques.

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A carbon film is made when the oxygen, hydrogen and nitrogen of the organism disappear, leaving a thin layer of carbon.

This process is known as distillation or carbonization.

Radiocarbon dating involves determining the age of an ancient fossil or specimen by measuring its carbon-14 content.

Carbon-14, or radiocarbon, is a naturally occurring radioactive isotope that forms when cosmic rays in the upper atmosphere strike nitrogen molecules, which then oxidize to become carbon dioxide.

The sheriff’s office said it has been told unofficially that the first set of skeletal remains are from a child perhaps 3 to 5 years old, and the second from a child around 4 to 9 years old.

Officials have not yet been able to determine the sex of the children.Sometimes cells of the plant are even visible if the cells were filled with water.Love-hungry teenagers and archaeologists agree: dating is hard.Unlike trace fossils, molds and casts, which form a three-dimensional shape of the object or organism, carbon film fossils are two-dimensional, like a drawing.They preserve an enormous amount of detail, such as the leaves and veins of a plant.For example, the half-life of carbon-14 is 5730 years.