how many years ago was a fossil sponges
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Sponge Calcium carbonate spicules of calcareous sponges have been found in Early Cambrian rocks from about 530 to 523 million years ago in Australia. Other probable demosponges have been found in the Early Cambrian Chengjiang fauna, from 525 to 520 million years ago. Freshwater sponges appear to be much younger, as the earliest known fossils date from the Mid-Eocene period about 48 to 40 million years ago.
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PLESIOSAUR / PLIOSAUR EARLY JURASSIC TO CRETACEOUS PERIOD: 220 million - 65 million years ago. Plesiosaurs were magnificent ocean-dwelling reptiles that flew gracefully through the water with massive paddles. They are often mistakenly called 'dinosaurs' but they not dinosaurs and are correctly classified as marine reptiles. They were around almost as long as the dinosaurs from the Triassic period 220 million years ago until the end of the Cretaceous 65 million years ago. Their remains have been found on every continent.
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- These soft bodied animals , like the fungi, existed in the Ediacaran period (late- Precambrian) about 560 mya. The earliest known chordates, animals with notochords and thus ancestors of vertebrate , were Pikaia. Chordate fossils are found in the Burgess Shale and are approximately 530 million years old.
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- The Cambrian Period (543 to 505 million years ago) is the first time period of the Paleozoic Era. It is preceded by the Precambrian. The Cambrian Period opened in the aftermath of a mass extinction.During the last 100 million years of the Precambrian, a unique fauna had developed.arly in the Cambrian Period the first bivalves and arthropods appeared followed by the first mollusks, brachiopods, and trilobites. During the Cambrian Period, all but one of the major groups of animals evolved during a period of 40 million years.
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Enormous Sea Sponge May Be the Oldest Animal on Earth “Sponges don’t have things like growth rings that can be used to estimate age,” researcher Daniel Wagner told New Scientist. “We do know, however, that several coral species that live at those depths can live to multiple hundred to even a few thousand years: the oldest one is 4500 years.
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The Cabinet Departments Department of Commerce. To promote and protect the industrial and commercial segments of the American economy. Duities include counting people every 10 years, redrawing district boundaries, issues patents for new inventions.
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When Trilobites Ruled the World A well-preserved trilobite specimen from Morocco that lived during the Devonian Period roughly 400 million years ago. WASHINGTON — Trilobites may be the archetypal fossils, symbols of an archaic world long swept beneath the ruthless road grader of time. But we should all look so jaunty after half a billion years.
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- The oldest known fossils, in fact, are cyanobacteria from Archaean rocks of western Australia, dated 3.5 billion years old. This may be somewhat surprising, since the oldest rocks are only a little older: 3.8 billion years old! Cyanobacteria are among the easiest microfossils to recognize.
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What Is the Average Life Span of a Lobster? The average lifespan of a sponge is 10 years or less. Sponges living in a temperate region may not live past a few years, but those living in the deep ocean may live to be 200 years old.
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Cnidaria: Fossil Record Cnidaria: Fossil Record. Many of the very best cnidarian fossils date back to the time when animals first appear in the fossil record, the Vendian. Since then, the fossil record of cnidarians without mineralized skeletons is quite sparse, and restricted to unusual sites with excellent fossil preservation. On the other hand, cnidarians which possessed hard skeletons, in particular the corals, have left a significant legacy of their existence.
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Oldest Fossils Ever Found Date Back 3.49 Billion Years, Australia Research Shows Oldest Fossils Ever Found Date Back 3.49 Billion Years, Australia Research Shows. Three-and-a-half billion years is a long time — after all, humans have only been around for about 2.3 million years. But scientists working in Western Australia's geologically rich Pilbara region say they've found the world's oldest fossils -- tiny weblike patterns on sandstone that date back 3.49 billion years.
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Giant barrel sponge Growth models for X. muta have been formulated from digital photographs of the same sponges over a period of 4.5 years. Sponge growth rates ranged from over 400% per year to only 2% per year. The largest sponges on Conch Reef, about the size of a oil barrel, were estimated to be about 130 years old.t is typically brownish-red to brownish-gray in color, with a hard or stony texture. The giant barrel sponge has been called the  redwood of the reef  because of its size and estimated lifespan of hundreds to a thousand or more years.
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- Trilobites: Extinct, but not a failure The trilobites may have gone extinct (along with 95% of marine species) during the mass extinction at the end of the Permian period, but that doesn’t mean that they were a failure. On the contrary, the trilobites survived for more than 250 million years (longer than the dinosaurs), and dominated seafloor ecosystems for much of this time. Pick up a piece of rock from the Cambrian period, over 500 million years ago, and most of the fossils you’ll see are trilobites.
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Cochise College-Student Papers in GeologyCochise College Ammonites are the most widely known fossil. They are cephalopods  and first appeared in the seas 415 million years ago, in the form  of a straight shelled creature known as … Bacrites. They do not have  legs.
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Cretaceous Period This fossil of an Ammonite (Prolyelliceras cf. peruvianum) dates tothe Early Cretaceous period, 106-100 million years ago. The Cretaceous period began at the end of the Jurassic period approximately 144 million years ago and extended longer than any period (79 ma) to approximately 65 million years ago.
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Ammonite Ammonites first appeared about 240 million years ago, though they descended from straight-shelled cephalopods called bacrites that date back to the Devonian, about 415 million years ago. Ammonites were prolific breeders, lived in schools, and are among the most abundant fossils found today.
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Geologic History of Georgia: Overview Numerous animals, including corals, brachiopods, snails, nautiloid cephalopods, crinoids, trilobites, and bryozoans, inhabited the shallow sea. During the Ordovician period (488 to 444 million years ago), the Iapetus Ocean began to close as a drifting continental tectonic plate neared eastern North America.This movement caused a downwarping of the sea floor and produced a chain of volcanic islands and mountains to the east.umerous animals, including corals, brachiopods, snails, nautiloid cephalopods, crinoids, trilobites, and bryozoans, inhabited the shallow sea. During the Ordovician period (488 to 444 million years ago), the Iapetus Ocean began to close as a drifting continental tectonic plate neared eastern North America.
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Cambrian explosion First, as mentioned above, the diversity seen in all other major exceptional faunas is a sample of life well after the beginning of the Cambrian explosion – in the case of the Burgess Shale, which may be as young as 507 million years or so, some 35 million years after the beginning of the Cambrian, as defined by trace fossil proliferation, and even longer after the first reasonable trace fossils.
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- The fossil collection in our museum begins about 750 million years ago, near the end of Precambrian time. The only multi-cellular life forms at the end of the Precambrian were in the oceans and included some groups that have survived until the present: jellyfishes and segmented worms (annelids). There was nothing yet on land except the wind.
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Arthropod Fossils Show âLimbsâ Of âFuxhianhuiid,â 520-Million-Year-Old Sea Creature Published: 02/27/2013 01:07 PM EST on LiveScience. Scientists have unearthed extraordinarily preserved fossils of a 520-million-year-old sea creature, one of the earliest animal fossils ever found, according to a new study.
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Triassic Period Cynepteris, an ancient Triassic fern. [ more ] The Triassic period began approximately 251 million years ago and extended for roughly 50 million years until 200 Ma. This period started and finished with large extinction events and dinosaur life was not as diverse as it would become later in the Jurassic period. The Triassic is divided into sections, which are:
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Arthropod Fossils Show âLimbsâ Of âFuxhianhuiid,â 520-Million-Year-Old Sea Creature The fuxhianhuiid lived nearly 50 million years before animals first emerged from the sea onto land, during the early part of the Cambrian explosion, when simple multicellular organisms rapidly evolved into complex sea life.
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- 1 Sea sponges, widely considered the first animals on Earth, now have some extra ammunition to back up that belief. 2  A molecule present in 640-million-year-old rocks comes from a simple sea sponge, according to genetic analysis done by Massachusetts Institute of Technology (MIT) researchers.
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Oldest Fossil Evidence for Animals Found Fossils of microbe colonies currently are evidence of the first known life on Earth, dating back to 3.5 billion years ago. Thereafter came a long period with little major development. The new analysis aside, fossils of the earliest multicellular organisms had been dated to 565 million to 543 million years ago.
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- Cyclomedusa davidi & Hiemalora stellaris. Geological Time: Precambrian, Vendian (600 - 550 Million Years Old) Size: Cyclomedusa 40 mm X 37 mm; Hiemalora 40 mm X 30 mm. Fossil Site: White Sea Summer Coast, Archangelsk, Russia. Description: This spectacular death assemblage predates the Cambrian Explosion by tens of millions of years.
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- The Ordovician Period. The Ordovician Period lasted almost 45 million years, beginning 488.3 million years ago and ending 443.7 million years ago.* During this period, the area north of the tropics was almost entirely ocean, and most of the world's land was collected into the southern supercontinent Gondwana.he major global patterns of life underwent tremendous change during the Ordovician. Shallow seas covering much of Gondwana became breeding grounds for new forms of trilobites. Many species of graptolites went extinct by the close of the period, but the first planktonic graptolites appeared.