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Keyword: platetectonics

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  • How Plate Tectonics was Discovered [An Answer to ":Settled Science" of 1970 from BBC]

    05/26/2022 3:21:32 PM PDT · by SES1066 · 14 replies
    In the 1960-70s, every geology textbook was rewritten, as the previous verities were DESTROYED! Alfred Wegner (1880-1930) was, posthumously, proven correct, in the face of the academia that scoffed at him. What was needed, was the mechanism, that the technology of WW2 provided.
  • Wild New Paper Suggests Earth's Tectonic Activity Has an Unseen Source

    01/27/2022 12:39:07 PM PST · by BenLurkin · 55 replies
    sciencealert.com ^ | 26 JANUARY 2022 | DAVID NIELD
    Earth is far from a solid mass of rock. The outer layer of our planet – known as the lithosphere – is made up of more than 20 tectonic plates; as these gargantuan slates glide about the face of the planet, we get the movement of continents, and interaction at the boundaries, not least of which is the rise and fall of entire mountain ranges and oceanic trenches. Yet there's some debate over what causes these giant slabs of rock to move around in the first place. Amongst the many hypotheses put forward over the centuries, convection currents generated by...
  • 'Wind' from Earth's middle layer blows through a secret passage beneath Panama

    01/02/2022 10:06:59 AM PST · by SunkenCiv · 23 replies
    Live Science ^ | published 15 days ago | Stephanie Pappas
    A geological secret passage beneath Panama may explain why rocks from Earth's mantle are found more than 1,000 miles (1,609 kilometers) from where they originated.This opening, located some 62 miles (100 km) below Earth's surface, may allow a flow of mantle materials to travel all the way from beneath the Galápagos Islands to beneath Panama.This never-before-discovered form of transport may also help explain why Panama has very few active volcanoes. On the west coast of Central America, the Cocos tectonic plate is diving down and pushes oceanic crust under the continental crust of the North American, Caribbean and Panama tectonic...
  • New mineral 'davemaoite' made an unlikely journey from the depths of the Earth

    11/17/2021 3:45:46 PM PST · by BenLurkin · 19 replies
    npr ^ | November 17, 20215:06 AM ET | EMMA BOWMAN ZIAD BUCHH
    Researchers say they've recovered a mineral from deep inside the Earth — one they thought would never see the light of day. Scientists at the University of Nevada, Las Vegas, named the mineral "davemaoite," after Ho-kwang "Dave" Mao, a retired experimental geophysicist whose influence on the field is still felt today. "It's an opportunity to give him credit for his big contributions," said Oliver Tschauner, a mineralogist who led a study of the rare mineral, in an interview with NPR's Morning Edition. No one ever expected to see the mineral on the Earth's surface. That's because deep-Earth minerals like davemaoite...
  • Geologists dig into Grand Canyon's mysterious gap in time

    08/22/2021 10:16:24 AM PDT · by BenLurkin · 65 replies
    Pys.org ^ | August 19, 2021 | University of Colorado at Boulder
    Think of the red bluffs and cliffs of the Grand Canyon as Earth's history textbook, explained Barra Peak, lead author of the new study and a graduate student in geological sciences at CU Boulder. If you scale down the canyon's rock faces, you can jump back almost 2 billion years into the planet's past. But that textbook is also missing pages: In some areas, more than 1 billion years' worth of rocks have disappeared from the Grand Canyon without a trace. It's a mystery that goes back a long way. John Wesley Powell, the namesake of today's Lake Powell, first...
  • Mysterious melting of Earth’s crust in Western North America, from BC, Canada to Sonora, Mexico

    04/29/2021 9:31:37 AM PDT · by Roman_War_Criminal · 29 replies
    SS ^ | 4.28/21 | SS
    A group of University of Wyoming professors and students has identified an unusual belt of igneous rocks that stretches for over 2,000 miles from British Columbia, Canada, through Idaho, Montana, Nevada, southeast California and Arizona to Sonora, Mexico. “Geoscientists usually associate long belts of igneous rocks with chains of volcanoes at subduction zones, like Mount Shasta, Mount Hood, Mount St. Helens and Mount Rainer,” says Jay Chapman, an assistant professor in UW’s Department of Geology and Geophysics. “What makes this finding so interesting and mysterious is that this belt of igneous rocks is located much farther inland, away from the...
  • When the Days Were Shorter

    10/04/2004 10:31:59 AM PDT · by SunkenCiv · 59 replies · 2,195+ views
    Alaska Science Forum (Article #742) ^ | November 11, 1985 | Larry Gedney
    Present-day nautilus shells almost invariably show thirty daily growth lines (give or take a couple) between the major partitions, or septa, in their shells. Paleontologists find fewer and fewer growth lines between septa in progressively older fossils. 420 million years ago, when the moon circled the earth once every nine days, the very first nautiloids show only nine growth lines between septa. The moon was closer to the earth and revolved about it faster, and the earth itself was rotating faster on its axis than it is now. The day had only twenty-one hours, and the moon loomed enormous in...
  • November 16, 2020 Former piece of Pacific Ocean floor imaged deep beneath China

    11/16/2020 9:23:15 AM PST · by BenLurkin · 9 replies
    phys.org ^ | 11/16/2020
    [S]eismic researchers have discovered the underside of a rocky slab of Earth's surface layer, or lithosphere, that has been pulled more than 400 miles beneath northeastern China by the process of tectonic subduction. The study, published by a team of Chinese and U.S. researchers in Nature Geoscience, offers news evidence about what happens to water-rich oceanic tectonic plates as they are drawn through Earth's mantle beneath continents. Rice University seismologist Fenglin Niu, a co-corresponding author, said the study provides the first high-resolution seismic images of the top and bottom boundaries of a rocky, or lithospheric, tectonic plate within a key...
  • Geologists 'resurrect' missing tectonic plate

    10/20/2020 9:33:20 PM PDT · by BenLurkin · 6,158 replies
    Phys.org ^ | 10/20/2020 | Sara Tubbs, University of Houston
    A team of geologists at the University of Houston College of Natural Sciences and Mathematics believes they have found the lost plate in northern Canada by using existing mantle tomography images—similar to a CT scan of the earth's interior. The findings, published in Geological Society of America Bulletin, could help geologists better predict volcanic hazards as well as mineral and hydrocarbon deposits. "Volcanoes form at plate boundaries, and the more plates you have, the more volcanoes you have," said Jonny Wu, assistant professor of geology in the Department of Earth and Atmospheric Sciences. "Volcanoes also affect climate change. So, when...
  • Likely active volcanoes found on Venus, defying theory of dormant planet

    07/26/2020 6:33:28 PM PDT · by SunkenCiv · 32 replies
    The Guardian ^ | Monday, July 20, 2020 | Agence France-Presse
    Scientists have identified 37 volcanic structures on Venus that appear to have been recently active - and probably still are today - painting the picture of a geologically dynamic planet and not a dormant world as long thought. The research focused on ring-like structures called coronae, caused by an upwelling of hot rock from deep within the planet's interior, and provided compelling evidence of widespread recent tectonic and magma activity on Venus's surface, researchers have said. Many scientists had long thought that Venus, lacking the plate tectonics that gradually reshape Earth's surface, was essentially dormant geologically, having been so for...
  • Hidden World of Undersea Volcanoes and Lava Flows Discovered Off Italian Coast

    09/26/2019 10:47:46 PM PDT · by BenLurkin · 14 replies
    Live Science ^ | 09/25/2019 | Stephanie Pappas
    Scientists aren't particularly surprised to find volcanism in the region, which is home to active volcanoes like Mount Vesuvius and Mount Etna. But the new complex is unusual because it was created by a rare kind of fault... The western Mediterranean is seismically restless because of the collision of three tectonic plates: the African, the Eurasian and the Anatolian. Making matters more complex is a small chunk of crust called the Adriatic-Ionian microplate, which broke off of the African Plate more than 65 million years ago and is now being pushed under the larger Eurasian Plate in a process called...
  • Geologist gets national attention for plate tectonics theory

    09/19/2019 4:36:33 PM PDT · by BenLurkin · 30 replies
    KOLO8 ^ | 09/16/2019
    Faulds is Nevada’s state geologist and director at the Nevada Bureau of Mines and Geology, and he has spent years looking into the impact that plate tectonics will have on our area. “Some of the major faults in western Nevada could reorganize themselves into becoming the major plate boundary.” Faulds says the course of 8 to 10 million years, plate movement will essentially result in the gulf of California extending all the way to northern Nevada, along a zone known as the Walker Lane, which runs along the land where you will currently find U.S. 395.
  • Deep-Sea Dinosaur Fossil Buries Evolution

    08/07/2019 3:37:44 PM PDT · by fishtank · 70 replies
    Institute for Creation Research ^ | 8-1-19 | Tim Clarey, Ph.D., and James J. S. Johnson, J.D., Th.D.
    Deep-Sea Dinosaur Fossil Buries Evolution Tim Clarey, Ph.D., and James J. S. Johnson, J.D., Th.D. Aug. 1, 2019 Oil and gas explorations have found sedimentary deposits so massive and so far offshore that secular science has no satisfactory explanation for their occurrence.1 Marine rock exposures have also revealed numerous land fossils washed great distances out to sea.2,3 Drilling off the coast of Norway has even pulled up a core containing dinosaur bone.4 Although these discoveries baffle uniformitarian scientists, they are not an issue for Flood geologists.
  • Drop of ancient seawater rewrites Earth's history

    08/05/2019 8:20:16 AM PDT · by SunkenCiv · 37 replies
    EurekAlert! ^ | August 1, 2019 | University of the Witwatersrand
    Research reveals that plate tectonics started on Earth 600 million years before what was believed earlier... Where it was previously thought that plate tectonics started about 2.7 billion years ago, a team of international scientists used the microscopic leftovers of a drop of water that was transported into the Earth's deep mantle - through plate tectonics - to show that this process started 600 million years before that. An article on their research that proves plate tectonics started on Earth 3.3 billion years ago was published in the high impact academic journal, Nature, on 16 July... For their research, the...
  • Space stunner: Moon is shrinking, shocking study reveals

    05/13/2019 1:30:22 PM PDT · by Candor7 · 48 replies
    Fox News ^ | 13 May 2019 | Chris Ciaccia
    Somebody alert Jeff Bezos: the Moon is shrinking. According to a new research study, the Moon may be shrinking as it experiences lunar quakes, known as "moonquakes." Researchers analyzed 28 moonquakes from 1969 to 1977 and came up with the startling observation that eight of the quakes came from "true tectonic activity — the movement of crustal plates," as opposed to impacts from asteroids or rumblings inside the celestial satellite. “We found that a number of the quakes recorded in the Apollo data happened very close to the faults seen in the [NASA’s Apollo and Lunar Reconnaissance Orbiter missions] LRO...
  • Ancient asteroid impacts played a role in creation of Earth’s future continents

    02/01/2019 12:37:16 AM PST · by Simon Green · 7 replies
    Heritage Daily ^ | 01/31/19
    More than 3.8 billion years ago, in a time period called the Hadean eon, our planet Earth was constantly bombarded by asteroids, which caused the large-scale melting of its surface rocks. Most of these surface rocks were basalts, and the asteroid impacts produced large pools of superheated impact melt of such composition. These basaltic pools were tens of kilometres thick, and thousands of kilometres in diameter. “If you want to get an idea of what the surface of Earth looked like at that time, you can just look at the surface of the Moon which is covered by a vast...
  • Scripps researchers discover new force driving Earth's tectonic plates

    07/06/2011 12:16:41 PM PDT · by decimon · 20 replies · 1+ views
    'Hot spots' of plume from deep Earth could propel plate motions around globeBringing fresh insight into long-standing debates about how powerful geological forces shape the planet, from earthquake ruptures to mountain formations, scientists at Scripps Institution of Oceanography at UC San Diego have identified a new mechanism driving Earth's massive tectonic plates. Scientists who study tectonic motions have known for decades that the ongoing "pull" and "push" movements of the plates are responsible for sculpting continental features around the planet. Volcanoes, for example, are generally located at areas where plates are moving apart or coming together. Scripps scientists Steve Cande...
  • Life is found in deepest layer of Earth's crust

    11/19/2010 1:25:40 PM PST · by Fractal Trader · 120 replies
    The New Scientist ^ | 18 November 2010 | Michael Marshall
    IT'S crawling with life down there. A remote expedition to the deepest layer of the Earth's oceanic crust has revealed a new ecosystem living over a kilometre beneath our feet. It is the first time that life has been found in the crust's deepest layer, and an analysis of the new biosphere suggests life could exist lower still. On a hypothetical journey to the centre of the Earth starting at the sea floor, you would travel through sediment, a layer of basalt, and then hit the gabbroic layer, which lies directly above the mantle. Drilling expeditions have reached this layer...
  • Amazon River Once Flowed in Opposite Direction

    10/24/2006 9:54:37 PM PDT · by SunkenCiv · 36 replies · 505+ views
    PhysOrg ^ | October 24, 2006 | University of North Carolina at Chapel Hill
    Russell Mapes, a graduate student from Grass Valley, Calif., ...explains that these sediments of eastern origin were washed down from a highland area that formed in the Cretaceous Period, between 65 million and 145 million years ago, when the South American and African tectonic plates separated and passed each other. That highland tilted the river's flow westward, sending sediment as old as 2 billion years toward the center of the continent. A relatively low ridge, called the Purus Arch, which still exists, rose in the middle of the continent, running north and south, dividing the Amazon's flow - eastward toward...
  • Ice Ages Blamed On Tilted Earth

    04/30/2006 4:35:48 PM PDT · by blam · 77 replies · 1,750+ views
    Live Science ^ | 3-30-2005
    Ice Ages Blamed on Tilted Earth By Michael Schirber LiveScience Staff Writer posted: 30 March 2005 In the past million years, the Earth experienced a major ice age about every 100,000 years. Scientists have several theories to explain this glacial cycle, but new research suggests the primary driving force is all in how the planet leans. The Earth’s rotation axis is not perpendicular to the plane in which it orbits the Sun. It's offset by 23.5 degrees. This tilt, or obliquity, explains why we have seasons and why places above the Arctic Circle have 24-hour darkness in winter and constant...