News tagged with bedrock
Brazil to boost military presence to protect Amazon
Brazil will boost its military presence in the Amazon region to protect its huge natural resources from any external threat, Defense Minister Celso Amorim told the Senate.
Apr 27, 2012 |
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Transient fluvial incision and active surface uplift in the Woodlark Rift of Eastern Papua New Guinea
The Woodlark Rift off-shore of eastern Papua New Guinea is the fastest extending continental crust on Earth.
Space & Earth / Earth Sciences
Mar 28, 2012 |
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How to save Europe's most threatened butterflies
New guidelines on how to save some of Europe's most threatened butterfly species have been published by a team of scientists co-ordinated by Butterfly Conservation Europe. The report covers 29 threatened species ...
Mar 28, 2012 |
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Brazil's Petrobras unit reports oil leak
Transpetro, a subsidiary of Brazil's state-run energy giant Petrobras, said Thursday it had detected an oil leak off the coast of Rio Grande do Sul state but did not know how much had spilled.
Jan 26, 2012 |
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New cores from glacier in the Eastern European Alps may yield new climate clues
Researchers are beginning their analysis of what are probably the first successful ice cores drilled to bedrock from a glacier in the eastern European Alps.
Space & Earth / Earth Sciences
Jan 09, 2012 |
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2010 spike in Greenland ice loss lifted bedrock, GPS reveals
(PhysOrg.com) -- An unusually hot melting season in 2010 accelerated ice loss in southern Greenland by 100 billion tons – and large portions of the island's bedrock rose an additional quarter of an inch ...
Space & Earth / Earth Sciences
Dec 09, 2011 |
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Experts stumped by ancient Jerusalem markings
Mysterious stone carvings made thousands of years ago and recently uncovered in an excavation underneath Jerusalem have archaeologists stumped.
Other Sciences / Archaeology & Fossils
Dec 07, 2011 |
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Plutonium's unusual interactions with clay may minimize leakage of nuclear waste
As a first line of defense, steel barrels buried deep underground are designed to keep dangerous plutonium waste from seeping into the soil and surrounding bedrock, and, eventually, contaminating the groundwater. But after ...
Nov 03, 2011 |
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Mars rover inspects next rock at Endeavour
(PhysOrg.com) -- NASA's Mars Exploration Rover Opportunity is using instruments on its robotic arm to inspect targets on a rock called "Chester Lake."
Space & Earth / Space Exploration
Sep 15, 2011 |
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On ancient Susquehanna, flooding's a frequent fact
(AP) -- Early settlers called the Susquehanna River "a mile wide and a foot deep." It's just a folk saying, but it hints at the forces behind a river that is, in fact, exceptionally likely to flood.
Sep 10, 2011 |
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International research team to bore into tectonic plates off Japan
An international research team will use the deep-sea drilling vessel Chikyu to bore into an area where two tectonic plates meet to study the movements of the plates that caused the Great East Japan Earthquake, according to ...
Space & Earth / Earth Sciences
Aug 15, 2011 |
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For Mars rovers, a friendly rivalry
NASA's newest Mars rover - or a replica of it, anyway - sat expectantly at the bottom of a hill. After years in design and construction, the grandly named Mars Science Laboratory was ready to test its wheels ...
Space & Earth / Space Exploration
Jun 10, 2011 |
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Bedrock of a holy city: the historical importance of Jerusalem's geology
Jerusalem's geology has been crucial in molding it into one of the most religiously important cities on the planet, according to a new study.
Space & Earth / Earth Sciences
Oct 19, 2009 |
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Scientists propose Antarctic location for 'missing' ice sheet
New research by scientists at UC Santa Barbara indicates a possible Antarctic location for ice that seemed to be missing at a key point in climate history 34 million years ago. The research, which has important ...
Space & Earth / Earth Sciences
Aug 25, 2009 |
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Bedrock
In stratigraphy, bedrock is the native consolidated rock underlying the surface of a terrestrial planet, usually the Earth. Above the bedrock is usually an area of broken and weathered unconsolidated rock in the basal subsoil. The top of the bedrock is known as rockhead and identifying this, via excavations, drilling or geophysical methods, is an important task in most civil engineering projects. Superficial deposits (also known as drift) can be extremely thick, such that the bedrock lies hundreds of metres below the surface.
Bedrock may also experience subsurface weathering at its upper boundary, forming saprolite.
A solid geologic map of an area will usually show the distribution of differing rock types; i.e., rock that would be exposed at the surface if all soil or other superficial deposits were removed.
For more information about Bedrock, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
