Sentences with phrase «rock deposited on»
Ward and Delph calculated their plutonic - to - volcanic ratio by comparing the volume of regions where seismic waves travel extremely slowly beneath volcanically active regions, indicating some melt is present, with the volume of rock deposited on the surface by volcanoes.
https://www.sciencedaily.com/ Not exact matches
App State, as it's known in conference, play in picturesque, inhospitable, 16,500 - seat Kid Brewer Stadium, a.k.a. the Rock, where students tore down the goalposts last Saturday night, then deposited one of them on the front lawn of chancellor Kenneth Peacock.
Depending on shifting cave conditions and varying amounts of uranium drainage from mineral deposits, this method can over - or underestimate when rock art was created, the scientists argued.
The researchers searched through nearly 1,200 published papers for data on mud rock in river deposits, and collected new field data at 125 ancient river outcrops.
Analyses of thin mineral deposits partly covering painted cave areas provided minimum age estimates for the art, based on known decay rates of radioactive uranium in the rock.
Thirty to forty rock and sediment core samples, each about 15 grams, will be hermetically sealed in titanium tubes and deposited in a safe location on the surface of Mars for possible retrieval by a future mission.
«From now on, continues Castelltort, we know that by calculating the ratio between 13C and 12C sampled in similar slope deposits close to continents, we can have an indication of the sea level, which means it's possible to better predict the distribution of sedimentary rocks in our subsurface.»
The dig site — the Prince Creek Formation — is a unit of rock that was deposited on an arctic, coastal flood plain about 69 million years ago.
On Earth, oceans absorb carbon dioxide from the atmosphere and deposit it as carbonate rock.
He bases his argument on the finding that unusually high levels of osmium - 187 have been found in sulphide rocks in the deposits.
The dunes also appear to have evolved similarly to those found on Earth, in that the original rocks have been deposited from somewhere else by volcanoes, oceans, rivers, etc. and then moved, shaped, and ground up by wind.
LIFE will test an idea called transpermia, in which organisms «could be ejected off one planet in impacts, travel through space inside rocks, then be deposited on another world», says Bruce Betts, LIFE's lead scientist.
The method has been proven robust for dating corals and larger rock formations in caves and has recently been adapted to date thin deposits of carbonate on rock art.
On Earth, hot water is known to sometimes contain a large quantity of dissolved zinc, which it can then deposit to form zinc - rich rocks.
About two dozen or so fossils of the creature have been recovered, all of them from 240 - million - year - old rocks deposited as sediment on the floor of a shallow, 5 - kilometer - long lake in what is now southern Germany.
The rocks were formed from sediment deposited on continental margins, so are free of chemical irregularities that would occur near a subsea volcano.
«These rocks were deposited on the ocean floor 440 million years ago near the south pole, and its components were oriented in the direction of the Earth's magnetic field at the time (N - S),» explains Javier Fernández Lozano, a geologist at the University of Salamanca and co-author of the research.
Molten rock (or magma) has a strong influence on our planet and its inhabitants, causing destructive volcanic eruptions and generating some of the giant mineral deposits.
On its way toward the surface the magmatic fluids cool and deposit copper in the fractured rocks forming giant metal deposits such as those exploited along the Andean Cordillera.
The French parliament voted on June 30 to ban the controversial technique for extracting natural gas from shale rock deposits known as hydraulic fracturing, or fracking, the web sites of Le Monde and other French media reported.The bill had already passed the National Assembly, the country's lower chamber, on June 21, and on June 30 a Senate vote of 176 to 151 made France the first country to enact such a ban, just as New York State is preparing to lift a moratorium on the same method.The vote was divided along party lines, with the majority conservative party voting in favor and the opposition voting against the bill, according to Le Monde.
The other hypothesis features neutral or alkaline water dissolving silica and depositing them on the rocks through the resulting solution.
The fine layers of sedimentary rocks the rover detected the mineral on, however, showed evidence that they may have been part of lakebed deposits.
On the field trip and from our extensive rock collection, we compared modern to Miocene age (0 - 20 million years old) hot springs in New Zealand with ~ 3.5 billion year old deposits in Western Australia, and we also discussed parallels with some unusual knobby silica deposits at Columbia Hills and other hot spring sinters at El Tatio, Chile, and in the Taupo Volcanic Zone.
Gray rubble on the flanks of Mauna Kea on the island of Hawaii lie in contrast to the red volcanic rock behind them, and were deposited by a glacier that disappeared thousands of years ago.
Based on previous studies, the Nili Fossae region is known to possess rocks and deposits that contain a green mineral called serpentine.
Acritarchs are found in rock deposits that were once marine and terrestrial aquatic environments, and have been described from localities on all continents, as well as from all time periods from the Proterozoic eon (starting 2
As this hot, mineral - rich water comes into contact with the cold bottom water, these minerals precipitate and form deposits on the surrounding rocks.
NASA's Curiosity rover finds calcium deposits on Mars similar to those seen on Earth when water circulates in cracks and rock fractures.
erosion The process that removes rock and soil from one spot on Earth's surface and then deposits the material elsewhere.
Lowering to the leeward side of the atoll in a slow flapping of wings, Obsidian deposited his burden on a sandy strip of beach and settled down on the rocks nearby.
To find out if you can book On the Rocks Hotel with a low deposit holiday option, please click the «Price and Availability» button above.
In this release, most activities will focus on finding gold, mining it from streams and rock deposits, and grouping with other players to establish mining camps before then transporting hard - earned gold to towns to be sold for in - game currency.
Eventually, over hundreds of millennia, weathering of rocks will deposit all of this initial CO2 pulse on the ocean floor as carbonate sediments [168].