Sentences with phrase «during volcanic events»
Other possibilities are the decomposition of organic matter in terrestrial settings, or the release of methane and carbon dioxide from deeply buried rocks during volcanic events.
https://www.palaeontologyonline.com/ Not exact matches
Mercury is an element found in the Earth's crust that is typically only released in unhealthy quantities during events like a volcanic eruption.
Layered volcanic rocks in Eastern Greenland that are up to 4 miles thick were formed during ancient volcanic eruptions that caused a global warming event called the Palaeocene - Eocene Thermal Maximum (PETM).
Any sediments left during a large volcanic event would therefore be expected to have unusually high mercury content.
Giant lateral collapses are rather common events during the evolution of a large volcanic edifice, often with dramatic consequences such as tsunami and volcano explosions.
During the 2000 - 2001 school year, Jason XII will explore Hawaii and compare volcanic events on Earth with those throughout the solar system.
(For those «coming in in the middle» — assuming any such are still reading — this subthread began with a link I provided discussing the vulnerability our complex society bears WRT to very large volcanic eruptions, in the context of the robustness of some Stone Age populations who «thrived» during the event — albeit at a considerable distance!)
El Nino intensity and frequency increase during solar minima because negative NAO / AO increases, and major stratospheric volcanic aerosol events increase, also increasing El Nino conditions.
Volcanic eruptions and El Niño events are identified as sharp cooling events punctuating a long - term ocean warming trend, while heating continues during the recent upper - ocean - warming hiatus, but the heat is absorbed in the deeper ocean.
We can see the temperature forcing of El Nino episodes driven by the surface cooling from large stratospheric volcanic events, and some research suggests that near permanent El Nino conditions existed during full glaciation ~ 20kyrs ago.
For example, there are oceanic cycles like the El Niño Southern Oscillation (ENSO, comprised of El Niño and La Niña events), an 11 - year solar cycle, and particulates released during volcanic eruptions which cause short - term cooling by blocking sunlight.
The minimum phase showed higher frequency events of volcanic activity than the maximum phase during the warming period, opposite to the cooling period.
Great mass extinction of species during geological history (late Devonian, Permian - Triassic, end - Triassic, Cretaceous - Tertiary, Paleocene - Eocene) have been triggered by volcanic, asteroid impact and greenhouse events associated with sharp increases in atmospheric levels of CO2 and CH4.