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Microscopic Diamonds Suggest Cosmic Impact Responsible For

Microscopic Diamonds Suggest Cosmic Impact Responsible For Major Period Of Climate Change

Emily Murphy, University of Chicago Press A new study published in The Journal of Geology provides support for the theory that a cosmic impact event over North America some 13,000 years ago caused a major period of climate change known as the...

Latest Palynology Stories

Study Questions Younger Dryas Event Comet Theories
2014-05-14 07:31:39

April Flowers for redOrbit.com – Your Universe Online Approximately 128,000 years ago, near the end of the last Ice Age, there was a brief episode of glacial conditions called the Younger Dryas event. The Younger Dryas, named for a flower that flourished during this time, lasted about 1,000 years. There has been quite a bit of controversy in the scientific community regarding what might have initiated the event—with a wide range of theories, including one that has the event caused by...

Researchers Have Developed New Quantitative Method Of Identifying Pollen Grains
2013-10-07 13:10:51

University of Illinois Since the invention of the earliest light microscopes, the classification and identification of pollen and spores has been a highly subjective venture for those who use these tiny particles to study vegetation in their field, palynology. However, according to the lead author of the study, Luke Mander, a former postdoctoral researcher in the laboratory of Illinois professor of plant biology Surangi Punyasena, the limitations imposed by these descriptive rather than...

Large Mammals Of Younger Dryas Wiped Out By Asteroid
2013-09-03 06:40:55

[ Watch the Video: Younger Dryas Impact Wiped Out Large Mammals ] Lawrence LeBlond for redOrbit.com - Your Universe Online Scientists long fascinated with trying to understand a dramatic global climate shift have revealed new evidence that could explain a few things. A new study, funded by the National Science Foundation and to be published online in the Proceedings of the National Academy of Sciences (PNAS) Early Edition, has found that a cataclysmic asteroid or comet impact in the...

Greenland Ice Not A Reliable Model For Younger Dryas Period
2012-06-27 10:08:54

Brett Smith for redOrbit.com Ice samples that profile Greenland glaciers have long been used to give climate scientists historical temperature data, but those samples could be misleading, according to a new study published Monday in the Proceedings of the National Academy of Sciences. A team led by University of Wisconsin-Madison researchers found that the data gathered from the ice cores around Greenland varies greatly from other records of Northern Hemisphere temperatures during the...

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2011-06-28 04:50:00

Analysis of direct climate record shows Antarctic tundra persisted until 12 million years ago A painstaking examination of the first direct and detailed climate record from the continental shelves surrounding Antarctica reveals that the last remnant of Antarctic vegetation existed in a tundra landscape on the continent's northern peninsula about 12 million years ago. The research, which was led by researchers at Rice University and Louisiana State University, appears online this week and will...

2011-03-02 20:43:23

A new University of Florida study of 45-million-year-old pollen from Pine Island west of Fort Myers has led to a new understanding of the state's geologic history, showing Florida could be 10 million to 15 million years older than previously believed. The discovery of land in Florida during the early Eocene opens the possibility for researchers to explore the existence of land animals at that time, including their adaptation, evolution and dispersal until the present. Florida Museum of...

2010-06-11 13:41:40

Research at the School of Geographical Sciences, Southwest University (SWU) in Chongqing, China-Research, has demonstrated that the record of the Asian Summer Monsoon (ASM) covers the last deglaciation and the early Holocene (from 16.2 to 7.3 ka BP), with an average oxygen isotope resolution of 9 years (issue 53, May 2010 of SCIENCE CHINA Earth Sciences). Understanding the factors responsible for past climatic changes is a key to understand future climate change. Such climatic changes include...

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2010-04-30 08:15:00

A Texas A&M University scientist spends hours at a time peering at slides of pollen samples, comparing them to track down the origins of honey with questionable heritage. Some of the samples contain labels from other countries when in fact they originated in China but were re-routed to avoid tariffs of up to 500 percent, says Vaughn Bryant, a palynologist and an anthropology professor at Texas A&M University. The tariffs were attached to the import of Chinese honey about two years ago...

2010-04-12 11:25:00

Study suggests that Ice Age climate change did not pose significant challenges to first Americans Paleoindian groups* occupied North America throughout the Younger Dryas interval, which saw a rapid return to glacial conditions approximately 11,000 years ago. Until now, it has been assumed that cooling temperatures and their impact on communities posed significant adaptive challenges to those groups. David Meltzer from the Southern Methodist University in Dallas, USA, and Vance Holliday from...

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2010-03-31 15:00:14

The main cause of a rapid global cooling period, known as the Big Freeze or Younger Dryas - which occurred nearly 13,000 years ago - has been identified thanks to the help of an academic at the University of Sheffield. A new paper, to be published in Nature on April 1, 2010, has identified a mega-flood path across North America which channeled melt-water from a giant ice sheet into the oceans and triggering the Younger Dryas cold snap. The research team, which included Dr Mark Bateman from...


Word of the Day
virgule
  • A punctuation mark (/) used to separate related items of information.
  • A little rod; a twig.
This word comes from the Late Latin 'virgula,' accentual mark, a diminutive of 'virga,' rod.
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