Sentences with phrase «by pyroclastic»
Immense flood basalts were accompanied by pyroclastic eruptions and together produced the Siberian Traps, an area of 2 million square kilometers of volcanic rock, which formed suddenly, on the Earth's surface.
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«At Kima'Kho, we were able to map a passage zone in pyroclastic deposits left by the earliest explosive phase of eruption, allowing for more accurate forensic recovery of paleo - lake levels through time and better estimates of paleo - ice thicknesses,» says UBC volcanologist James K Russell, lead author on the paper published this week in Nature Communications.
A team of researchers led by Tim Goudge, a graduate student in the Department of Geological Sciences at Brown, looked at 51 pyroclastic sites distributed across Mercury's surface.
Visually, over the last few days there is no eruption accompanied by bursts of ash and pyroclastic material with great pressure since 30/11/2017, but the seismicity is still high.
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.