Mar 14 2019Kennett is a proponent of the Younger Dryas Boundary Impact Hypothesis which posits a series of comet fragments collided with Earth 13 000 years ago triggering the cooling that snuffed out Northern Hemisphere's megafauna species The new evidence suggests the impact event affected the Southern Hemisphere too Jul 31 2020This work shows that the geochemical signature associated with the cooling event is not unique but occurred four times between 9 000 and 15 000 years ago Brandon said in a statement If the Younger Dryas' cause was an asteroid it would have been puny compared to the object that killed the non-avian dinosaurs

Younger Dryas cooling event said to be comet related

Jul 27 2015Younger Dryas cooling event said to be comet related Anthony Watts / July 27 2015 From the University of California – Santa Barbara: A cataclysmic event of a certain age Geologist James Kennett and an international team narrow the date of an anomalous cooling event most likely triggered by a cosmic impact

Laacher See is known to have erupted at the onset of the Younger Dryas which is the most recent dramatic cooling event recorded in the past 15 000 years The earth may have been at a tipping point possibly from the ice sheet discharge and the eruptions of one or more powerful volcanoes could have provided the impetus to drive the cooling

Laacher See is known to have erupted at the onset of the Younger Dryas which is the most recent dramatic cooling event recorded in the past 15 000 years The earth may have been at a tipping point possibly from the ice sheet discharge and the eruptions of one or more powerful volcanoes could have provided the impetus to drive the cooling

Jul 31 2020This work shows that the geochemical signature associated with the cooling event is not unique but occurred four times between 9 000 and 15 000 years ago Brandon said in a statement If the Younger Dryas' cause was an asteroid it would have been puny compared to the object that killed the non-avian dinosaurs

A hypothesized Younger Dryas impact event presumed to have occurred in North America about 12 900 years ago has been proposed as the mechanism that initiated the Younger Dryas cooling [103] Among other things findings of melt-glass material in sediments in Pennsylvania South Carolina and Syria have been reported

A View from the Beach: glaciers

Younger Dryas cooling event said to be comet related At the end of the Pleistocene period approximately 12 800 years ago — give or take a few centuries — a cosmic impact triggered an abrupt cooling episode that earth scientists refer to as the Younger Dryas

The Younger Dryas impact hypothesis or Clovis comet hypothesis posits that fragments of a large (more than 4 kilometers in diameter) disintegrating asteroid or comet struck North America South America Europe and western Asia about 12 800 years ago Multiple airbursts/impacts produced the Younger Dryas (YD) boundary layer (YDB) depositing peak concentrations of

Stadial events Late Pleistocene climate cycles were controlled by orbital parameters of the Milankovitch cycles including eccentricity (~100 000 years) obliquity to the ecliptic plane (~41 000 years) and precession/wobble of the Earth's axis (~19 000 and ~23 000 years) The Younger dryas of 12 900 to 11 600 years ago following the Allerod Blling warm peak and marked by cooling

Laacher See is known to have erupted at the onset of the Younger Dryas which is the most recent dramatic cooling event recorded in the past 15 000 years The earth may have been at a tipping point possibly from the ice sheet discharge and the eruptions of one or more powerful volcanoes could have provided the impetus to drive the cooling

Dec 19 2016Studies refute hypothesis on what caused abrupt climate change thousands of years ago Two new studies in the Journal of Quaternary Science refute the hypothesis that one or more comets/bolides struck North America approximately 12 900 years ago triggering rapid climate change and the start of the Younger Dryas period

I recently discovered an essay from Graham Hancock that manages to convey both the profound intellectual significance — and petty scholastic drama — of the Younger Dryas Impact Hypothesis since 2007 Hancock doesn't note his good timing but as he writes in 2017 it is the 10th anniversary of the Comet Research Group's Acapulco AGU presentations introducing []

Aug 02 2020The cooling of the Younger Dryas lasted approximately 1 200 years making a single volcanic eruptive cause an important initiating factor but other changes to Earth's climate and environment were needed such as ocean cooling event

Mar 14 2019Kennett is a proponent of the Younger Dryas Boundary Impact Hypothesis which posits a series of comet fragments collided with Earth 13 000 years ago triggering the cooling that snuffed out Northern Hemisphere's megafauna species The new evidence suggests the impact event affected the Southern Hemisphere too

The Evidence for the Younger Dryas Impact Hypothesis

The Younger Dryas Impact hypothesis describes a possible cause for the cataclysmic scenario In this article we will explore the evidence that the earth was the victim of a very recent and life-shaking cosmic impact The Prehistoric end of the Ice-Age and the great flood The Younger Dryas was a period that lasted from 12 800 – 11 600 years

A hypothesized Younger Dryas impact event presumed to have occurred in North America about 12 900 years ago has been proposed as the mechanism that initiated the Younger Dryas cooling [103] Among other things findings of melt-glass material in sediments in Pennsylvania South Carolina and Syria have been reported

The main driver of the Gulf Stream is the Sun When the Sun goes into hibernation for a period of time the Gulf Stream will slow down This is visible in the ice cores We do not have to look for any outlandish ideas for events like the Younger Dryas cooling Yes large meteor impacts can be the cause of sudden temperature drops

Aug 18 2019This sudden cooling lasted until about 11 500 years ago when the Earth started to warm up again Historians call this cold period the Younger Dryas They do not know what caused it although they have a few suggestions One of the suspects: a passing comet Historians think the Younger Dryas started when a comet impacted the Earth

The aim of this research is to determine the response of the vegetation in coastal Maritime Canada to the Younger Dryas cooling event (10 800—10 000 1 4 C yr BP) that interrupted the warming trend following the last glaciation Detailed paleoecological studies were carried out on the organic pollen and plant macrofossil content of sediment cores recovered from six small

The Younger Dryas Boundary Comet Impact Theory proposes that an extraterrestrial event most likely due to a comet or multiple cometary fragments occurred at or near the beginning of the Younger Dryas and was instrumental in triggering a period of signifigant cooling on the Earth The Younger Dryas is a known period of cooler climate lasting

Aug 02 2020The cooling of the Younger Dryas lasted approximately 1 200 years making a single volcanic eruptive cause an important initiating factor but other changes to Earth's climate and environment were needed such as ocean cooling event