News tagged with ancient sediments
Bias in the rock record?
Space & Earth / Earth Sciences
Jan 14, 2009 |
3.8 / 5 (6) |
0
(PhysOrg.com) -- The fossil record is known to be biased by the unevenness of geographical and stratigraphical sampling, and the lack of exposed rocks containing fossils. In a recent Perspective in Science [2 Jan ...
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DNA from old insects -- no need to destroy the specimen
Apr 01, 2009 |
3 / 5 (1) |
0
In a new study published April 1 in the online, open-access, peer-reviewed journal PLoS ONE, ancient DNA (aDNA) is retrieved from various insect remains without destruction of the specimens.
Lake sediments help scientists trace 7,000 years of mining, metal use in China
Other Sciences / Archaeology & Fossils
Jun 16, 2008 |
5 / 5 (2) |
0
A new geochemical study illuminates 7,000 years of mining and metal use in central China and links these trends to fluctuations in airborne pollution during the Bronze Age and other military and industrial ...
Scientists 'rebuild' giant moa using ancient DNA
Jul 01, 2009 |
5 / 5 (12) |
12
(PhysOrg.com) -- Scientists have performed the first DNA-based reconstruction of the giant extinct moa bird, using prehistoric feathers recovered from caves and rock shelters in New Zealand.
Orbiter discovers a possibly once-habitable ancient Mars lake
Space & Earth / Space Exploration
Mar 06, 2008 |
4.4 / 5 (28) |
2
Scientists studying images from The University of Arizona-led High Resolution Imaging Experiment camera on NASA's Mars Reconnaissance Orbiter have discovered never-before-seen impact "megabreccia" and a possibly ...
Iron isotopes as a tool in oceanography
Space & Earth / Earth Sciences
Jul 31, 2009 |
3.7 / 5 (3) |
1
New research involving scientists from the National Oceanography Centre, Southampton (NOCS) highlights the potential utility of iron isotopes for addressing important questions in ocean science. The findings are published ...
Earliest animals lived in a lake environment, research shows
Other Sciences / Archaeology & Fossils
Jul 27, 2009 |
4.4 / 5 (7) |
3
Evidence for life on Earth stretches back billions of years, with simple single-celled organisms like bacteria dominating the record. When multi-celled animal life appeared on the planet after 3 billion years ...
Geologists demonstrate extent of ancient ice age
Space & Earth / Earth Sciences
Jun 16, 2009 |
4.2 / 5 (13) |
6
Geologists at the University of Leicester have shown that an ancient Ice Age, once regarded as a brief ‘blip’, in fact lasted for 30 million years.
Gulf exploration yields evidence of raw materials used by early Americans
Other Sciences / Archaeology & Fossils
Aug 31, 2009 |
4.4 / 5 (5) |
0
In one of the more dramatic moments of an underwater archaeological survey co-led by Mercyhurst College archaeologist James Adovasio along Florida's Gulf Coast this summer, Andy Hemmings stood on an inundated ...
'Lost' sediments show details of polar magnetic field
Space & Earth / Earth Sciences
Feb 28, 2008 |
4.5 / 5 (6) |
0
UC Davis researchers studying cores of sediment collected 40 years ago have found evidence for magnetic field vortices in the Earth's core beneath the South Pole. The results contrast with earlier studies at lower latitudes, ...
Andes Mountains Are Older Than Previously Believed
Space & Earth / Earth Sciences
May 15, 2009 |
4.9 / 5 (7) |
1
(PhysOrg.com) -- The geologic faults responsible for the rise of the eastern Andes mountains in Colombia became active 25 million years ago—18 million years before the previously accepted start date for the ...
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