Discover the expert in you.
Discover the expert in you.
Like other dinosaur skeletons or teeth, dinosaur eggs can become fossilized. Fossils have been mineralized so they are very hard and don't wear away as the years pass. Many different types of dinosaur eggs can be found in California.
The nautilus and the ammonite are similar organisms. Both are aquatic molluscs with spiral shells. Ammonites, however, have been extinct since the K-T event that killed the dinosaurs 65 million years ago while the nautilus still roams the seas. There are numerous other differences between the two creatures, most of which are minor.
Which Georgia gold mine is the oldest has been a subject of much debate, with no definitive answer. American Indians panned for gold along the Chattahoochee River as early as the 16th century, and Spaniards likely mined in the area from 1560 to 1690. According to the March 2010 issue of the "People of One Fire" newsletter, Spanish gold mine claim symbols were found on boulders along Nickajack Creek in Cobb County, yet official Spanish records make no mention of any claims.
Life on Earth began over 3.7 billion years ago with the appearance of prokaryotes, the most primitive life known to exist. Prokaryotes, better known as bacteria, possess no nucleus and no advanced cellular machinery. They are unicellular and are only a small fraction of the size of a plant or animal cell. Despite their primitive construction, prokaryotes are the most populous life on the planet, outnumbering every other form of life, combined, by many orders of magnitude. Without prokaryotes, no other life would exist.
Prokaryotes are the simplest kind of living thing on the planet -- and yet they are the most diverse, oldest and toughest type of organism known. It is only in recent decades that scientists have come to recognize the extent to which these organisms are spread across the planet and the fundamental differences among their many varieties.
The desert's flora is sparse, it's fauna is scarce in the daylight hours and it's ground is dry and dusty; yet, there are more products provided by just the U.S. deserts alone to list in the context of an article. On the short list: rocks and minerals; plants, especially medicinal plants; alternative energy, and last but not least, sand.
Landforms are the natural, physical features of our planet's surface, or landscape. The shape and form (morphology) identifies the various landforms. Geologic processes are natural forces that change landforms, and other areas of the earth's surface. Changes caused by geologic processes constantly happen in both large and small ways. Changes are sometimes so gradual they are noticed only in retrospect
When you think of life you most likely think of plants and animals, but what about the microscopic single-cell organisms moving all around you? They are microscopic, can be found almost everywhere and are extraordinary in numbers. In fact, the amount of prokaryotes that can be measured in one handful of fertile soil is greater than the number of people that have ever lived on Earth.
The oldest fossils on Earth are microscopic fossils of blue-green algae that lived 3.5 billion years ago. These fossils are found in the oldest rocks and are representative of life on the planet at the time that they lived.
Modern humans did not develop in a straight evolutionary line from some transitional "missing link" creature, as is often thought. Rather, the hominid family tree is a branching one, on which Homo sapiens is the only surviving member. Modern humans, members of the Homo group, have only existed for about 200,000 years, not even qualifying this group as the most successful hominids. The three other known hominid groups are the Ardipithecines, Australopithecines and Paranthropus.
Whales are part of the Cetecea family that includes porpoises and dolphins. Generally most animals originated in the ocean and then moved to land; whales did the opposite. The earliest known fossilized whales were land animals that were on their way back into the sea. Whales are believed to be the descendants of hoofed carnivores that ate fish.
The Earth is teaming with life. Most of the planet's inhabitants are far removed from their genetic ancestors. In fact, as much as 99 percent of all known life has become extinct in the more than billion years that have passed since Earth's primordial beginnings. While it is impossible to make direct observations of the planet's deep past, fossil records do provide an idea of the way things were millions and billions of years in the past.
Sometimes called zone fossils, indicator fossils or guide fossils, index fossils are used to guide geologists and paleontologists in the demarcation of various geological time periods. The idea is based on the fact that sediment deposits contain a record of species that lived in a particular timeframe. As sediment layers build upon each other, we can therefore understand a vast span of time in comparatively minute detail.
Indian money refers to relics found around the United States that resemble wampum beads made from clam shells by New England Native American tribes. The term Indian money is a misnomer, as these relics are in fact fossil remains of a sea creature known as a crinoid. Crinoids exist in the oceans today, but nowhere near the numbers and diversity as in the past when the Indian money was created.
Fossils are the hardened remains or imprints of long dead organisms that provide a window into the ecological past. They can form many different ways, but they all provide a unique look at an organism that lived long ago. Fossils are often millions of years old, but the world's oldest fossils are even much more ancient.
An index fossil is formed by a plant or animal that lived during a limited geological timeframe. Its presence in a particular layer of sedimentary rock helps paleontologists and geologists determine the age of that layer and the relative ages of the layers above and below. A good index fossil needs to be abundant, easy to recognize and short-lived, and it needs to have a wide distribution.
Fossils are formed when organisms die under conditions favorable for preservation and are subsequently buried under strata (layers) of rock. Paleontologists can determine the age and order of different fossils based on the stratum that the rock comes from and by looking at the content of various radioisotopes (radioactive atoms) within the fossil. Numerous fossils of humans and human ancestors have been unearthed, beginning with the discovery of Neanderthal skulls in 1856. Modern paleontologists have identified thousands of fossils belonging to several dozen species of human ancestors.
Fossils give us a glimpse of what life used to be on our planet. A fossil can be any type of ancient evidence preserved by the earth's crust: an animal's bones, a preserved nest, or even parts of ancient plants and animals. There are several types of fossils that paleontologists study, but the two major categories are "body" fossils and "trace" fossils. Fossils can also be divided according to how they were formed.
Fossils are the preserved remains or traces of ancient life forms. Traces are only preserved if the organism dies where it is protected from the elements and any scavengers, such as in sand or mud. Various radiometric dating techniques are used to determine their age. Fossils within the animal kingdom include those of mammals, amphibians, sponges, insects and worms.
At one time, spiral-shelled creatures called ammonites roamed the ancient seas. Between 240 million and 65 million years ago, they died out along with the dinosaurs, but abundant fossilized evidence of their existence remains for scientists and amateur collectors to discover. Holding a piece of history millions of years old can be a thrilling experience, although it can be difficult to know where to begin. Several tips will help you in your search for a link to the past.
Astounding creatures once roamed our planet. Some were as tall as a nine-story building or longer than a city bus. Some weighed as much as ten elephants or as little as a house cat. And the only way we know about them is through fossil evidence. From tiny sea invertebrates to winged reptiles the size of airplanes, animals that lived millions of years ago became fossilized. And the most familiar of these are the dinosaurs.
Wandering the earth in Prehistoric eras, from terrifying tyrannosauruses to awe-inspiring flying pterodactyls, dinosaurs remain a source of mystery and delight. The word dinosaur derives from the Greek words "dienos" and "sauros," respectively meaning "terrifying lizard." Browse through artifacts of these extinct reptiles in the quiet halls of Virginia's museums, touching fossilized bones and wondering at the sheer size of the earth's dinosaurs.
Huge skeletal displays of dinosaur remains awe many people, but paleontologists often look to much smaller things in order to learn more about dinosaurs. Fossilized dinosaur eggs allow scientists to know more about dinosaur development and how these large creatures began their lives. Ever since the first discovery of egg shells, fossilized dinosaur eggs have helped to tell the story of dinosaur reproduction. Certain areas of the world hold more fossilized dinosaur eggs than others, so even though a fossil looks egg-like, it may not necessarily be an egg.
Finding a whale fossil can be done in two separate ways. You can discover a whale fossil, which will require you digging up or uncovering a whale bone in an area that was once sea but is now land. You will need to do this before anybody else has had the chance to cover this area. The second way is to find them in a museum. This will allow you to study whale bones, often in a complete skeleton.
Ammonites represent fossil remains from extinct creatures that lived in the oceans. Described as ribbed spiral-formed shells, these fossils depict a species of cephalopods whose modern day relatives are the octopus, squid and nautilus. The fossil shells contain intricate patterned details known as sutures, which are dips and folds in the shell. Their purpose was to hold together the interlocking chambers of the ammonite.
Fossils are the remains of living organisms or the evidence of their activity that have been buried in sediment and preserved, says Webster's New World Collegiate Dictionary. Paleontologists study fossils to learn when various types of life forms appeared and what their development, existence and extinctions tell us about the effects of changing conditions on Earth. Using isotope pairs with long half-lives, radiometric dating provides a means to accurately determine the age of individual fossils, says Action Bioscience.
"Living fossil" is an informal term for species which appear to have undergone very little evolutionary change over a long period of time, often millions of years. These organisms are very similar to their fossilized ancestors. The term was coined by Charles Darwin in The Origin of Species, in reference to lungfish.
The Devonian period, lasting from 417 million years ago to 354 million years ago, is also known as the Age of Fishes. During the Devonian era, vegetation developed from small plants into ferns and trees, while animals colonized the land and thousands of fish species evolved in the oceans.
Across the globe, new fossils are found every day by novice excavators and seasoned paleontologists alike to reveal some of the Earth's secrets once thought lost. While some of the information obtained can serve immediate economic purposes, such as directing a search for oil or other natural minerals, the most valuable information is what these fossils reveal about the past. Encased in the bones, footprints, egg shells and imprints of long-dead sea creatures, land animals and plants is a treasure trove of information about Earth's history.
Ancestral origins have become a topic of interest for many individuals and families looking to construct their family trees. DNA material contains in-depth information on family traits and how gene materials evolve. Developments in DNA studies have provided another route for discovering even more about a family's place of origin and migration patterns.
Paleontology is the study of prehistoric life, primarily conducted through the analysis of fossils. By studying the preserved remains of creatures and plants that lived millions of years ago, scientists can glean valuable information about the origin and evolution of life on this planet.
The Coelacanth (pronounced "see-la-kanth") is a living fossil. This fish was thought to have died out over 65 million years ago until one was caught in a fisherman's net off the coast of South Africa in 1938. These fish are lobe finned, meaning the fins are attached to the body much as arms and legs are attached to a human body.
Ammonites are the fossilized remains of mollusks which appeared on earth for about 330 million years and became extinct by the end of the Cretaceous period. Collectors treasure the fossils for the intricate shell patterns and colors.
Limestone is commonly used in construction, sometimes as part of the formula to make cement or as crushed rock. In its natural state and in certain parts of the world, limestone can be a treasure trove for fossil hunters.
Forty-five miles west of Colorado Springs, Colorado, Canon City offers a tremendous opportunity to observe the preserved footprints of dinosaurs along the ancient coastline of the Western Interior Seaway, also called the Cretaceous Seaway.
Dinosaur fossils are preserved dinosaur remains found in geographical locations around the world. Such fossils can help scientists to learn about the history of the earth and about the characteristics of extinct dinosaurs which are a part of Earth's history. Scientists who uncover and study dinosaur fossils are called paleontologists.
Fossils are the remains of prehistoric plants or animals that are embedded in rock. These fossils provide scientists with information about each layer of rock where the fossils were found. This information includes the age of the rock or clues to the environment at the time the rock was formed. Geologists and paleontologists use index fossils to compare rocks from different locations as well as to learn the history of life and the Earth. Index fossils can also be called type, key, guide, zonal, diagnostic or characteristic fossils.
Fossil fuels are some of the more popular fuel sources in the world today. Oil and coal, which many nations burn every day to provide power, are two examples of this type of fuel. As a nonrenewable resource, we must be very careful as to how much fossil fuel we burn, or there will be a major shortage in the years to come. There are many problems facing this topic that some people believe will be solved by the foundation of more renewable sources of fuel.
