Early history of the oceans. (25 Years of Ocean Drilling)

Oceanus | December 22, 1993| | Copyright

Since ocean crust is created by seafloor spreading and destroyed by subduction, the sedimentary record of ancient oceans can only be found as far back as the Jurassic (about 170 million years ago) by drilling into the oldest parts of the oceans themselves. Continents, however, are potentially immortal and drilling into their margins may reveal older sedimentary rocks. As a counterpoint to these studies, sediments and fossils exposed on land but formed in oceans or their margins can be investigated by the geologist. Such rocks typically occur in mountain chains formed where ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Superconductivity.
Magazine article from: Science Progress ; ...fundamental experimental signatures of superconductivity--perfect conductivity and...framework of the BCS model of superconductivity. New materials have brought to light novel forms of superconductivity. Many cases are now known which...
MAGNETISM, SUPERCONDUCTIVITY OBSERVED TO EXIST IN HARMONY
News Wire article from: US Fed News Service, Including US State News ; ...a situation where magnetism and superconductivity are necessary for each other's...competing states of magnetism and superconductivity as one in which no truce could be...potential in energy savings that superconductivity holds for ultra-efficient power...
Superconductivity can induce magnetism.
Newspaper article from: NewsRx Science ; ...this seemingly trivial property, superconductivity, is now at the forefront of our...that, contrary to previous belief, superconductivity can induce magnetism, which has...order, which is a surprise given how superconductivity and magnetism cannot easily be accommodated...
Disappearing Superconductivity Reappears -- in 2-D; 'Striped' Material Offers More Clues to High-Temperature Superconductivity.
News Wire article from: Ascribe Higher Education News Service ; ...surprising, this new form of 2-D superconductivity emerges at a higher temperature than ordinary 3-D superconductivity in other compositions of the...lines." The basic idea behind superconductivity is that electrons, which ordinarily...
Pinning down superconductivity to a single layer.
Newspaper article from: Electronics Business Journal ; ...ultrathin films with "tunable" superconductivity for higher-efficiency electronic...and still retain high-temperature superconductivity?" The thinner the material (and...potential for applications where the superconductivity can be controlled by an external...
No resistance to superconductivity. (federal aid to superconductivity research)
Magazine article from: Science News ; No resistance to superconductivity If it's true that sound travels...phrase "high-temperature superconductivity' might have set new records...consortia to aid the push to move superconductivity out of the lab and into the...
PINNING DOWN SUPERCONDUCTIVITY TO SINGLE LAYER
News Wire article from: US Fed News Service, Including US State News ; ...ultrathin films with "tunable" superconductivity for higher-efficiency electronic...and still retain high-temperature superconductivity?" The thinner the material (and...potential for applications where the superconductivity can be controlled by an external...
Center for Innovative Technology offers $500,000 to promote superconductivity research at state universities. (Virginia)
PR Newswire ; ...TECHNOLOGY OFFERS $500,000 TO PROMOTE SUPERCONDUCTIVITY RESESARCH AT STATE UNIVERSITIES HERNDON...available for further research into superconductivity at universities throughout Virginia...to encourage the use of results of superconductivity resesarch in industry, funds from...
Superconductivity glimpsed near 300 K. (superconductivity at room temperature)
Magazine article from: Science News ; Superconductivity Glimpsed Near 300 K Room-temperature superconductivity is a dream of condensed-matter physicists...existence, including a short appearance of superconductivity at a temperature of 292 kelvins, or 66[deg...
Disappearing superconductivity reappears -- in 2-D.
Newspaper article from: NewsRx Health & Science ; ...surprising, this new form of 2-D superconductivity emerges at a higher temperature than ordinary 3-D superconductivity in other compositions of the...lines." The basic idea behind superconductivity is that electrons, which ordinarily...

Find more facts and information related to the article "Early history of the oceans. (25 Years of Ocean ..."