Results for “what is a fossil” · retrieved September 22, 2026
A fossil is the preserved remains, impression, or trace of any once-living organism from a past geological age.
Scientifically, a fossil is any preserved remnant, impression, or trace of a once-living organism from a past geological age found in a geologic context. These remains are typically older than 10,000 years. Fossils are generally categorized into body fossils, which are the physical remains of an organism (such as bones, teeth, shells, or leaves), and trace fossils, which are evidence of an organism's biological activity (such as footprints, burrows, or coprolites). While hard parts like skeletons are most commonly preserved, fossils can range from microscopic bacteria to massive trees and dinosaurs. The collection of all known fossils is called the fossil record, which serves as a primary source for understanding the history of life on Earth.
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Body Fossils
Body fossils are the physical remains of an organism, such as bones, teeth, shells, wood, or leaves, which are often preserved through mineralization.
Trace Fossils
Trace fossils, or ichnofossils, are evidence of an organism's behavior or activity while it was alive, including footprints, tracks, burrows, and coprolites (fossilized dung).
Age Requirement
In scientific contexts, a specimen is typically considered a fossil if it is older than 10,000 years, though this is an arbitrary threshold.
The Fossil Record
The fossil record is the totality of all discovered and undiscovered fossils, providing essential data on the history of life, evolution, and past environments on Earth.
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About this answerFossil
What is a fossil?...A fossil is any remnant, impression, or trace of an animal or plant from a past geologic age preserved in Earth’s crust. The fossil record is the primary source of information about the history of life on Earth....Fossils are most often formed from organisms with solid, resistant skeletons. Hard parts like bones and teeth are more likely to be preserved than soft tissues, which tend to decompose rapidly. Rapid burial of the or
July 20, 1998
What is a Fossil? - Fossils and Paleontology (U.S. ...
Fossil (noun):Evidence of life preserved in a geologic context....Fossils provide information about plants, animals, and microorganisms that have lived on Earth throughout geologic time. What a fossil is can be highly variable. Fossils range from the bones of giant dinosaurs like Apatosaurus to the remains of microscopic organisms or grains of pollen. Fossils also include hefty chunks of petrified wood and the trails that trilobites left on
November 1, 2024
Fossil
A fossil (from Classical Latin fossilis, lit. ' obtained by digging') [1] is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the fossil record. Though the fossil record is incomplete, numerous studies have demonst
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What is a fossil?
Fossils are physical evidence of prehistoric animals and plants. They tell us about the history of our planet, from climate and evolution to diets and diseases....When an organism dies and is quickly covered by layers of mud, sand or silt, it has the potential to become a fossil....Rather than rotting away, some parts of its body are replaced by minerals. In some cases, such as for small soft-bodied animals, this process can take just months, or
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About Fossils - Fossils and Paleontology (U.S. National Park Service)
Fossils (paleontological resources) are evidence of past life preserved in geologic context. Fossils include bones, shells, teeth, leaf impressions, casts of tree roots, footprints, delicate impressions of insect wings, and other physical remains of past organisms or traces of biological activity....Fossils consist of either the altered (or rarely unaltered) bodily remains of ancient organisms, or preserved evidence of biological activity of an o
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Fossil
Fossils are the preserved remains, or traces of remains, of ancient animals and plants....Fossils are the preserved remains, or traces of remains, of ancient organisms....A fossil can preserve an entire organism, just part, or traces of one (for example, footprints). Bones, shells, fur, skin, footprints, feathers and leaves can all become fossils....Preserved remains are defined as fossils if they are older than 10,000 years old. The oldest fossi
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Fossils - British Geological Survey
What is a fossil?...Fossils are the preserved remains of plants and animals whose bodies were buried in sediments, such as sand and mud, under ancient seas, lakes and rivers. Fossils also include any preserved trace of life that is typically more than 10 000 years old....Soft body parts decay soon after death, but the hard parts, such as bones, shells and teeth can be replaced by minerals that harden into rock. In very exceptional cases, soft
May 5, 2020
Fossils | WFS
Fossils (from Latin fossus, literally “having been dug up”) are the preserved remains or traces of animals (also known as zoolites), plants, and other organisms from the remote past. The totality of fossils, both discovered and undiscovered, and their placement in fossiliferous (fossil-containing) rock formations andsedimentary layers (strata) is known as the fossil record....The study of fossils across geological time, how they were formed, and
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