A transitional fossil is any fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group.

Partial skeletons and even complete fossilized remains have been discovered.

Fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the Earth's crust over millions of years.

This led him to conclude that fossilized objects like petrified wood and fossil shells, such as Ammonites, were the remains of living things that had been soaked in petrifying water laden with minerals.

* Transitional fossil, any fossilized remains of a lifeform that exhibits the characteristics of two distinct taxonomic groups

This meteorite received much attention after an electron microscope revealed structures that were considered to be the fossilized remains of bacteria-like lifeforms.

He knew that pearls came from shell-fish, that coral came from India, and speaks of the fossilized remains of organic life.

In 1870, workers blasting a site for a stone quarry found fossilized remains of tree stumps.

Several fossils sites from South Africa seem to show that Dinofelis may have hunted and killed Australopithecus africanus since they harbored fossilized remains of Dinofelis, hominids, and other large contemporary animals of the period.

Most paleontologists hold fossilized jaw remains to be the distinguishing feature used to classify synapsids and reptiles.

Brachiopods and bivalves made their appearance at this time and left their fossilized remains behind in the rocks.

The La Brea Tar Pits Museum is built around the tar pit around the house fossilized remains of mammals and birds found within.

The stone is rich in fossils ( known as shells to local masons ) often consisting of almost fifty percent fossilized remains with an average size of approximately 350 mm.

Vertebrate paleontology is a large subfield to paleontology seeking to discover the behavior, reproduction and appearance of extinct animals with vertebrae or a notochord, through the study of their fossilized remains.

A transitional fossil is any fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group.

The term in its broadest sense also includes the remains of other organic material produced by an organism — for example coprolites ( fossilized droppings ) or chemical markers — or sedimentological structures produced by biological means-for example, stromatolites.

Trace fossils contrast with body fossils, which are the fossilized remains of parts of organisms ' bodies, usually altered by later chemical activity or mineralization.

An examination of the bones revealed that Sue died at age 28, a record for the fossilized remains of a < I > T-rex </ I >.

Petrified wood ( from the Greek root petro meaning " rock " or " stone "; literally " wood turned into stone ") is the name given to a special type of fossilized remains of terrestrial vegetation.

In addition to the paintings and other human evidence, they also discovered fossilized remains, prints, and markings from a variety of animals, some of which are now extinct.

The fossilized remains of H. s. idaltu were discovered at Herto Bouri near the Middle Awash site of Ethiopia's Afar Triangle in 1997 by Tim White, but were first unveiled in 2003.

Paleontology, the study of the fossilized remains of ancient life, is the key to understanding and engaging this prehistoric world.

Since the remains of fossilized remains have been found in the rocks, it is does not pre-date the origins of life and is therefore probably about 600 million years old.

Dunlop & Horrocks ( 1996 ) suggested that the hypoctonids may be the sister-group to the Schizomida and Proschizomus Dunlop & Horrocks 1996, but the character polarities they utilized were regarded as uncertain and many features of Proschizomus were not observable in the fossilized material.

The chitinous jaws of annelids ( such as the marine scolecodonts ) are sometimes preserved as fossils ; while many arthropods and inarticulate brachiopods have easily fossilized hard parts of calcite, chitin, or keratin.

Sowerby, a naturalist and illustrator who catalogued fossil shells, received from Mantell many fossilized specimens.

The island's substrate is called Key Largo limestone ; in many places, fossilized corals and smooth, eroded limestone " caprock " are visible at the surface.

Areas of Oakland also contain many areas where fossilized crustaceans can be found along the banks of the river.

The evidence provided by the conch ( Shankh ) at Surla Village, fossilized marine conches discovered in 1863, petrified roots, fossilied branches have been found later in many villages on the foothills of the Sahyadri dating back more than 10, 000 BC.

At Mount St. Helens, both unfossilized and partially fossilized trees were observed in many outcrops of volcanic debris and mud flows ( lahars ) and pyroclastic flow deposits, which date from 1885 to over 30, 000 BP., along the South Toutle and other rivers.

More than 60 plant species are fossilized in these strata, such as hydrangea, peas, hawthorn, and mulberry, as well as pines and many deciduous trees.

It contains many fossilized shark teeth that can be collected from the edges of the lagoon.

The broad fossilized growth rings in many Glossopteris woods reveal that the plants experienced strong growth spurts each spring-summer but underwent abrupt cessation of growth before each following winter.

A fossilized Neanderthal bone will never be found in the same stratum as a fossilized Megalosaurus, for example, because neanderthals and megalosauruses lived during different geological periods, separated by many millions of years.

There, two hundred fossilized rhinoceros and many other animals were preserved in two meters of volcanic ash.

This hypothesis was supported by the fact that many of the bones showed signs of having been gnawed prior to fossilization, and by the presence of objects Buckland suspected to be fossilized hyena dung.

In many places in the Mediterranean, fossilized cracks have been found where muddy sediment had dried and cracked in the sunlight and drought.

Afar is well known as one of the cradles of hominids, containing the Middle Awash, site of many fossil hominid discoveries such as Ardi, ( Ardipithecus ramidus ); the Gona ( Gawis cranium ), site of the world's oldest stone tools ; and Hadar, site of Lucy, the fossilized specimen of Australopithecus afarensis.

Whether this is due to an actual lack of tadpole stage or taphonomy ( many diadectomorphs were upland creatures where tadpoles would have a poor probability of being fossilized ) is uncertain.

Some historians and geographers, judging from other successes of Sannikov and the presence of shallow sand shoals at its mapped location, postulate that Sannikov Land indeed existed, but was destroyed by coastal erosion and became a submerged sand shoal like many other islands, formed either of fossilized ice or of permafrost.

Many of these fossilized forms contain exceptional quality noble opal.

The most significant limitation is that, although there are 30-plus phyla of living animals, two-thirds of these phyla have never been found as fossils, because most animal species are soft-bodied and decay before they can become fossilized.

His reasoning for these plates to be covered in horn is that the surface fossilized plates have a resemblance to the bony cores of horns in other animals known or thought to bear horns, and his reasoning for the plates to be defensive in nature is that the plates had insufficient width for them to stand erect easily in such a manner as to be useful in display without continuous muscular effort.

Many of these fossilized logs can still be found today at the base of the Wilson Cliffs.

Known as the Lewis Overthrust, these sedimentary rocks are considered to have some of the finest fossilized examples of extremely early life found anywhere on Earth.

( Forty years later, the Hercules emulator can be used to run " fossilized " versions of these systems, based on source code that is now treated as part of the public domain.

These structures are the earliest signs of life on Earth, with some fossilized ones being found from 3, 500 million years ago ( though the biological origin of these fossils is disputed ) at North Pole, also in Western Australia, and are considered the longest continuing biological lineage.

It was these observations by Anning that led the geologist William Buckland to propose in 1829 that the stones were fossilized feces and named them Coprolites.

Exclusively soft-bodied animals -- such as jellyfish, flatworms, nematodes, and insects -- are consequently rarely fossilized, as these groups do not produce hard organic parts.

Some researchers suggested that these microscopic structures on the Martian ALH84001 meteorite could be fossilized bacteria.

Most scientists ultimately concluded that these were far too small to be fossilized cells.

A variety of ornithopods and related cerapods had thin cartilaginous plates along the outside of the ribs ; in some cases, these plates mineralized and were fossilized.

The principle of faunal succession, also known as the law of faunal succession, is based on the observation that sedimentary rock strata contain fossilized flora and fauna, and that these fossils succeed each other vertically in a specific, reliable order that can be identified over wide horizontal distances.