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MU Researchers Find Rare Fossilized Embryos More Than 500 Million Years Old

By Guest PostMay 4, 2014Nature, Scienceairway diseases, aviation emissions, cambrian explosion, cambrian period, cchi, evolutionary biology, hubei province, marine invertebrates, mark nichols, matt long, pegasus mission, realitaets check, roboter, south china, wolfram burgard

Study methods may help with future interpretation of evolutionary history.

COLUMBIA, Mo. – The Cambrian Period is a time when most phyla of marine invertebrates first appeared in the fossil record. Also dubbed the “Cambrian explosion,” fossilized records from this time provide glimpses into evolutionary biology when the world’s ecosystems rapidly changed and diversified. Most fossils show the organisms’ skeletal structure, which may or may not give researchers accurate pictures of these prehistoric organisms. Now, researchers at the University of Missouri have found rare, fossilized embryos they believe were undiscovered previously. Their methods of study may help with future interpretation of evolutionary history. (more…)

Global Extinction: Gradual Doom as Bad as Abrupt

By Guest PostFebruary 8, 2012Environment, Sciencebrooks ellwood, canadian arctic, carbon dioxide, charles henderson, coal deposit, dead zone, earth, ellesmere island, extinction, factor, fossil, geologic history, geology, global extinction, greenhouse, greenhouse gas, h richard lane, harry rowe, indian ocean, katherine freeman, marine life, mass extinction, national science foundation, ocean, permian period, permian triassic boundary, sedimentary rock, siberian traps, siberian volcanic activity, south china, steven bates, tethys, the great dying, thomas algeo, timothy lyons, united states, university of calgary, university of cincinnati, volcanic deposit, volcanic rock, volcanism in siberia, warming, west blind fiord

*In “The Great Dying” 250 million years ago, the end came slowly*

The deadliest mass extinction of all took a long time to kill 90 percent of Earth’s marine life–and it killed in stages–according to a newly published report.

It shows that mass extinctions need not be sudden events.

Thomas Algeo, a geologist at the University of Cincinnati, and 13 colleagues have produced a high-resolution look at the geology of a Permian-Triassic boundary section on Ellesmere Island in the Canadian Arctic. (more…)

Oldest Fossils of Large Seaweeds, Worm-like Animals Tell Story of Ancient Oxygen

By Guest PostFebruary 20, 2011Sciencealgae and worms, black shale, cambrian explosion, dynamic and complex nature, ediacaran period, Environment, eukaryotes, evolution of life, geochemical data, global ocean, lantian, lantian basin, macrofossils, macroscopic eukaryotes, organic rich black, oxygen, pristine fossils, richard lane, seaweeds, shuhai xiao, snowball earth, south china, virginia tech, xunlai yuan

*Geobiologists uncover Davy Jones Locker of fossils near small village in south China*

Almost 600 million years ago, before the rapid evolution of life forms known as the Cambrian explosion, a community of seaweeds and worm-like animals lived in a quiet deep-water niche near what is now Lantian, a small village in south China.

Then they simply died, leaving some 3,000 nearly pristine fossils preserved between beds of black shale deposited in oxygen-free and unbreathable waters. (more…)

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MU Researchers Find Rare Fossilized Embryos More Than 500 Million Years Old

Global Extinction: Gradual Doom as Bad as Abrupt

Oldest Fossils of Large Seaweeds, Worm-like Animals Tell Story of Ancient Oxygen