Geologists have long assumed that the Hawaiian Islands owe their existence to a "hotspot" -- stationary plumes of magma that rise from the Earth's mantle to form Mauna Loa, Kilauea and Hawaii's other massive volcanoes. But a new study posted on the online version of the journal Science disputes that long-standing paradigm by concluding that the fixed hotspot in the Pacific was not stationary after all. Geological Survey in Menlo Park, Calif.
Bulletin Volcanologique. The potassium-argon method is attractive for dating volcanics since it can be applied to rocks of Pleistocene age and older, thus encompassing important periods of general volcanic activity. However it has been found that dates obtained on whole rocks and on included minerals frequently show gross discordances.
Young-Earth Creationist 'Dating' of a Mt. Kevin R. Henke, Ph.
Geologists have long assumed that the Hawaiian Islands owe their existence to a hotspot, a collection of stationary plumes of magma rising from the Earth's mantle and penetrating the surface that formed Mauna Loa, Kilauea and other massive volcanoes. The predominant theory is that the Pacific Plate has been moving across a fixed Hawaiian hotspot for millions of years, creating a trail of volcanoes whose peaks emerge from the ocean as Maui, Oahu and the other islands that make up the 49th state. But now a team of researchers is raising questions about this long-standing paradigm and providing new evidence that fixed hotspots may not be stationary after all. Geological Survey in Menlo Park, Calif.
Because radiometric dating utterly refutes their biblical interpretations, young-Earth creationists YECs are desperate to undermine the reliability of these dating methods. As part of their efforts, YECs clearly believe that they can discredit K-Ar dating if they can show that excess argon routinely enters rocks and minerals as they form. That is, they believe that excess argon will cause rocks and minerals that are supposedly less than 10, years old to have 'deceptively' old K-Ar dates of millions or billions of years.
How old is the Earth? Are young-earth arguments equal in rigor to those supporting an old Earth? How can we tell what happened in Earth history when no one was there to witness it?
How Old is That Volcano? Dating corals, knowing the ocean Going vertical: Gauging ocean overturn rates What's it like to go on a cruise? Home Choose an Expedition Exp.
Paul R. Will R. A change in direction of the movement of the plate caused the direction of the islands to change, which is why there is a kink in the line of islands.
Until the mids, it was impossible to know when each of the flows occurred. However, as this video segment adapted from NOVA describes, scientists are now using tiny artifacts of life encased in hardened lava flows to piece together the mountain's complex geological and biological history. Flowing lava erases nearly everything in its path. An entire forest can be wiped out by streams of molten rock.