indeksifossileja

Indeksifossileja, also known as index fossils or guide fossils, are a type of fossil that is used to determine the relative age of rock layers. They are distinctive, widespread, and limited to a short span of geologic time. Index fossils are typically hard parts of ancient organisms, such as shells or bones, that are preserved in the rock record. Because they are unique and have a known range in the fossil record, they can be used to correlate rock layers across different locations. This correlation is crucial for understanding the sequence of geological events and the history of life on Earth. Some well-known index fossils include the trilobite, brachiopod, and ammonite. These fossils help geologists piece together the puzzle of Earth's history by providing a common reference point for different rock formations.