• This sequence crosses the boundary between the early Holocene and the Late Glacial, a boundary recently detected in 13C and 2H records of pine tree-ring cellulose (Becker, Kromer & Trimborn 1991). (evcforum.net)
  • Assuming that the observed 62-m uplift reflects several non-eruptive intrusions of magma, each similar to the unrest over the past decade, we find that ~13 km 3 of magma recharged the reservoir at a depth of ~7 km during the Holocene, accompanied by the eruption of ~9 km 3 of rhyolite. (sciencemag.org)
  • According to the Smithsonian National Museum of Natural History's Global Volcanism Program, Lokon is the higher of twin volcanic peaks separated by 2.2 kilometers (1.4 miles) in northeast Indonesia. (cnn.com)
  • Imaging from NASA's Shuttle Radar Topography Mission 99 (STS-99) reveals part of the 10-mile-diameter (180 kilometers) ring of the crater. (space.com)
  • In a 25,000 mile horseshoe shape, it is associated with a nearly continuous series of oceanic trenches, volcanic arcs, and volcanic belts and/or plate movements. (enn.com)
  • It has been recognized for almost 50 years that the volcanic arcs form where one oceanic plate sinks beneath another,’ said Professor Philip England of Oxford University’s Department of Earth Sciences, an author of the report, ‘but while many models of this process have been put forward, none has been able to explain the location, and narrowness, of the volcanic arcs. (enn.com)
  • The numerous sinkholes clustered around the trough of the crater suggest a prehistoric oceanic basin in the depression left by the impact. (space.com)
  • Several flights from Saudi Arabia to different destinations in the Horn of Africa, including Eritrea, Ethiopia, Sudan and Djibouti, have been canceled or rescheduled after a massive ash cloud entered the skies of Eritrea following a volcanic eruption, said Abdullah Al-Azhar, a spokesman of Saudi Arabian Airlines, here on Monday. (blogspot.com)
  • A key issue is whether the magma flux into the upper crust is sufficiently large, over long enough periods of time, to sustain growth of magma reservoirs thermally capable of producing large rhyolitic eruptions, rather than crystallizing into plutons ( 5 - 8 ). (sciencemag.org)
  • This volcanic activity releases immense quantities of heat, minerals, gases and other substances, and often produces "hydrothermal systems" or seafloor hot springs. (noaa.gov)
  • The eastern section of the ring is the result of the Nazca Plate and the Cocos Plate being subducted beneath the westward moving South American Plate. (enn.com)
  • Indonesia lies between the Ring of Fire along the northeastern islands adjacent to and including New Guinea and the Alpide belt along the south and west from Sumatra, Java, Bali, Flores, and Timor. (enn.com)
  • but they evidently were effaced by the slow processes of atmospheric and stream erosion, or in basin areas were deeply covered by sediments, before the formation of the oldest of our fossiliferous strata. (wikisource.org)
  • According to a statement released by the American Geophysical Union , researchers often attribute that extinction event - to the asteroid collision that hit the Yucatán Peninsula, which combined with other forces of climate change - like the Deccan Plateau volcanic eruptions - to make for hostile global environments. (space.com)
  • Global climate models fail to accurately simulate the Asian monsoon, and these limitations have hampered our ability to plan for future, potentially rapid and heretofore unexpected shifts in a warming world," said Edward Cook, head of Lamont's Tree Ring Lab, who led the study. (scitech-news.com)
  • Climate predictions for the Mediterranean Basin include increased temperatures, decreased precipitation, and increased frequency of extreme climatic events (ECE). (frontiersin.org)
  • The demonstrated relationship of MR formation to ECE across this dendrochronological network in the Mediterranean basin shows the potential of MR analysis to reconstruct the history of past climatic extremes and to predict future forest dynamics in a changing climate. (frontiersin.org)
  • The rest of the room was filled with lapilli, except the northeast corner where the volcanic deposit was cut by a layer of ash. (stoa.org)
  • Meanwhile, the Eritrean volcanic ash cloud threatens air travel. (blogspot.com)
  • The matter which has been changed into our splendidly luminous sun was at one time very attenuated and occupied the whole space inclosed by the orbit of the outermost planet, which was developed from a comparatively very small cloud or ring of this matter, centrifugally detached from the revolving exceedingly tenuous mass. (wikisource.org)
  • In addition to the four absolute dendrochronologies discussed so far, there is a "floating" chronology of interest in measuring the age of the earth by counting annual tree ring layers: the German pine chronology. (evcforum.net)
  • There are two aspects to this floating chronology: (1) the annual rings and the amount of time (age) they cover, and (2) the way it is tethered and then anchored to the absolute German oak chronology. (evcforum.net)
  • Very recently, five additional pines covering 14C dates in the 8800 BP range have cross-matched with the end of the pine master chronology, extending the sequence to 1768 tree rings. (evcforum.net)
  • Note that this matches the pine chronology to the oak chronology by wiggle-matching the 14C levels, a slightly less accurate method than by matching tree ring patterns. (evcforum.net)
  • Further study with additional samples not only corrected some of the oak chronology (the 41 year shift mentioned previously in Message information: Message 15: Comparing European Oak and Bristlecone Pine Chronologies by 14C Levels (Msg ID 814158) Thread 19503: The Age of the Earth (version 3 no 1 part 1) Forum 3: Dates and Dating ', 500)" onMouseOut=" hb.off(0)" onMouseMove="mouseTracker(event)">Message 15 ) but improved the linkage to the pine chronology by matching tree ring patterns instead of using 14C wiggle matching. (evcforum.net)
  • ring-width chronology of Picea jezoensis var. (notrickszone.com)
  • yr B.P. in magnetic susceptibility records from Bransfield Basin," (2) "dates of moss adjacent to the present ice front in the South Shetland Islands (Hall, 2007) indicate that ice there was no more extensive between ca. 650 and 825 cal. (wattsupwiththat.com)
  • The tree rings provide additional evidence of a severe drought in China referenced in some historical texts as the worst in five centuries. (scitech-news.com)
  • The overlap between both curves consists of 295 tree rings, but this important linkage is still tentative and must be confirmed by additional 14C measurements. (evcforum.net)
  • The volatile activity continued after that, though authorities could not immediately ascertain how many additional, separate eruptions had occurred. (cnn.com)
  • In addition, fluids produced by volcanic activity often have high concentrations of metals that quickly precipitate in cold ocean waters, and may be directly linked to the formation of ores and concentrated deposits of gold and other precious and exotic metals. (noaa.gov)
  • First, we have linked 185 subfossil pines to an unbroken floating record of 1605 tree rings. (evcforum.net)
  • Tree rings reveal hydroclimatic fingerprints of the Pacific Decadal Oscillation on the Tibetan Plateau. (wsl.ch)
  • From xylogenesis to tree rings: wood traits to investigate tree response to environmental changes. (wsl.ch)
  • The drought roiled political structures all the way to Siberia, and the tree rings also indicate that western India was severely affected. (scitech-news.com)
  • The anatomy of tree rings responds to these environmental conditions. (frontiersin.org)
  • The tree-ring records in the study reveal at least four great droughts that are linked to catastrophic events in history. (scitech-news.com)
  • Tree-ring δ 18 O from an Alpine catchment reveals changes in glacier stream water inputs between 1980 and 2010. (wsl.ch)
  • For some tree species, rainfall determines the width of their annual growth rings, and these rings are what the scientists were able to read. (scitech-news.com)
  • yr B.P. is consistent with tree-ring data from New Zealand that show a pronounced peak in summer temperatures (Cook et al . (wattsupwiththat.com)
  • That was unlike in July 2011, when a series of Lokon eruptions prompted the evacuation of more than 4,000 locals. (cnn.com)
  • These replenishment episodes likely drive rapid inflation, destabilize cooling systems, propel rhyolitic eruptions, and thus should be carefully monitored. (sciencemag.org)
  • It's everything from low-land rain forests to high in the Himalayas," said study coauthor Kevin Anchukaitis, a Lamont tree ring scientist. (scitech-news.com)
  • Also noting that the area had a roughly beaten floor and no impluvium, De Franciscis therefore concluded that it must have been a testudinate atrium, whose restoration, after the AD 62 earthquake, had not been completed by the time of the eruption (see also de Vos and de Vos 1982:119). (stoa.org)
  • Under particularly adverse conditions, no xylem may be produced in parts of the stem, resulting in a missing ring (MR). A dendrochronological network of Pinus halepensis was used to determine the relationship of MR to ECE. (frontiersin.org)
  • I am teaching the class 'Ecological Tree-Ring Research' within the Master course at the Department of Geography . (wsl.ch)
  • scientists first identified it in teak rings from Thailand, and later in Vietnamese cypress trees. (scitech-news.com)