Sentences with phrase «large volcanic deposit»

Not exact matches

The spatial deposition of sulfur particles in the bipolar ice cores, as calculated in the model, agrees well with the actually measured deposits of large volcanic eruptions, such as Pinatubo in 1991 or even of Tambora of 1815.

«In any case, the results of our model study give a clear indication that the bipolar variability of sulfate deposits must be taken into consideration if the traces of large volcanic eruptions are to be deduced from ice cores,» says Dr. Krüger, «Several research groups that deal with this issue have already contacted us to verify their data through our model results.»

The volume of ash deposited, and the estimated height of the eruption plume (43 kilometers above sea level) put the eruption's magnitude at a minimum of 7 on the volcanic explosivity index (which has a scale of 1 to 8)-- making it one of the largest known in the Holocene.

I've sometimes thought that global cataclysms like the largest volcanic eruptions would disrupt the glacial records by many years, like Oruanui eruption c. 26500bp, as these would induce unrecorded behavior in weather and other things, f.e. the huge ash deposits might decrease the albedo so much a local melting event happens.

They found that the diatom - rich sediments, deposited during the warm intervals, were predominantly composed of material from one terrane - the Jurassic to Cretaceous volcanic rocks and associated sedimentary rocks of the Ferrar Large Igneous Province (FLIP).

The images show that the axial valley at 4,000 m water depth is blanketed by an extensive set of pyroclastic deposits, raising important questions regarding the accumulation and discharge of magmatic volatiles on such ridges and demonstrating that large - scale pyroclastic activity is possible along even the deepest portions of the global mid-ocean ridge volcanic system.