Subscribe free to our newsletters via your
. Earth Science News .




Subscribe free to our newsletters via your




















CLIMATE SCIENCE
Earliest human impact on geological processes took place 11,500 years ago
by Staff Writers
Tel Aviv, Israel (SPX) Jun 07, 2017


illustration only

"A new Tel Aviv University study has uncovered the earliest known geological indications of manmade impact on geological processes, in particular erosion of the surface, from 11,500 years ago. Within a core sample retrieved from the Dead Sea, researchers discovered basin-wide erosion rates dramatically incompatible with known tectonic and climatic regimes of the period recorded.

"Human impact on the natural environment is now endangering the entire planet," said Prof. Shmuel Marco, Head of TAU's School of Geosciences, who led the research team. "It is therefore crucial to understand these fundamental processes. Our discovery provides a quantitative assessment for the commencement of significant human impact on the Earth's geology and ecosystems." The results of the study were published in Global and Planetary Change.

The research was conducted by TAU post-doctoral student Dr. Yin Lu and in collaboration with Prof. Dani Nadel and Prof. Nicolas Waldman, both of the University of Haifa. It took place as part of the Dead Sea Deep Drilling project, which harnessed a 1,500-foot-deep drill core to delve into the Dead Sea basin. The core sample provided the team with a sediment record of the last 220,000 years.

The newly-discovered erosion occurred during the Neolithic Revolution, the wide-scale transition of human cultures from hunting and gathering to agriculture and settlement. The shift resulted in an exponentially larger human population on the planet.

"Natural vegetation was replaced by crops, animals were domesticated, grazing reduced the natural plant cover, and deforestation provided more area for grazing," said Prof. Marco. "All these resulted in the intensified erosion of the surface and increased sedimentation, which we discovered in the Dead Sea core sample."

A natural laboratory in the Dead Sea
The Dead Sea drainage basin serves as a natural laboratory for understanding how sedimentation rates in a deep basin are related to climate change, tectonics, and man-made impacts on the landscape.

"We noted a sharp threefold increase in the fine sand that was carried into the Dead Sea by seasonal floods," said Prof. Marco. "This intensified erosion is incompatible with tectonic and climatic regimes during the Holocene, the geological epoch that began after the Pleistocene some 11,700 years ago."

The researchers are currently in the process of recovering the record of earthquakes from the same drill core. "We have identified disturbances in the sediment layers that were triggered by the shaking of the lake bottom," Prof. Marco said. "It will provide us with a 220,000-year record - the most extensive earthquake record in the world."

Research paper

CLIMATE SCIENCE
Trump wants to 'stay engaged' on climate: Tillerson
Sydney (AFP) June 5, 2017
US President Donald Trump wants to stay engaged on climate change and has not abandoned the issue, Secretary of State Rex Tillerson said Monday, days after Trump announced he was quitting the Paris accord. Trump's decision, which has been roundly denounced by the international community, was based on his belief that it "did not serve the American people", Tillerson said in Sydney. "It d ... read more

Related Links
American Friends of Tel Aviv University
Climate Science News - Modeling, Mitigation Adaptation

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

Comment using your Disqus, Facebook, Google or Twitter login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

CLIMATE SCIENCE
Sri Lanka targets unauthorised builders after monsoon deaths

GMV to supply Copernicus services in support to EU external action

Sri Lanka hails record military deployment as toll hits 213

European Reassurance Initiative requests billion-dollar budget increase

CLIMATE SCIENCE
Bamboo inspires optimal design for lightness and toughness

Model for 2-D materials based RRAM found

New scaling law predicts how wheels drive over sand

Space junk could destroy satellites, hurt economies

CLIMATE SCIENCE
Off US coast, Tangier Island disappearing under water

Envoys wade in to help US waters despite Trump climate snub

Fish uses special lips to eat razor-sharp, venomous coral

Understanding a river's 'thermal landscape' may be the key to saving it

CLIMATE SCIENCE
How the Arctic Ocean became saline

Antarctic ice rift close to calving, after growing 17km in 6 days - latest data from ice shelf

Arctic peoples' climate pleas fell on deaf ears

Previously, on Arctic warming

CLIMATE SCIENCE
Myanmar's edible bird nest industry comes home to roost

As temperatures rise, plants take up more carbon

Brexit risks disrupting EU agriculture market, experts warn

Scientists discover plant 'brain' controlling seed development

CLIMATE SCIENCE
2017 hurricane season follows year of extremes

One dead, two missing as Taiwan battles floods

Sediment from Himalayas may have made 2004 Indian Ocean earthquake more severe

Deep magma reservoirs are key to volcanic 'super-eruptions'

CLIMATE SCIENCE
African Union offers full support for UN climate deal

EU to give 50 million euros for African force in Sahel

China rejects Uganda ivory trafficking claims against diplomats

One dead after Gambian protesters clash with W. African troops

CLIMATE SCIENCE
Tourists risk getting bit when they mistake monkey aggression for affection

Ancient grains offer insights into the birth and growth of the world's oldest cities

Fossil skeleton confirms earliest primates were tree dwellers

Springs were critical water sources for early humans in East Africa, Rutgers study finds




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement