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A violent large scale eruption such as that of Mt St Helens or Mt Pinatubo can be seen the ice record for a number of 2 main reasons.
Firstly the eruption is likely to release a large amount of volcanic ash and debris. Mt Pinatubo estimated emission of around 10 billion metric tonnes was spewed into the atmosphere.
Quantities of this will be deposited locally and regionally however also extensive amount will be flung high in to the atmosphere. The material can be caught in trade winds and deposited as the winds drop over the Arctic/Antarctic the matter can be deposited leaving a record of the type of material deposited.
The second reason is the change in the earths temperature created by volcanic eruptions. At cold periods more water is formed in the upper atmosphere with heavy oxygen. Heavy oxygen is an isotope of oxygen (greater number of neutrons) this is measurable and allows scientist to predict what the climate used to be like (paleoclimatology). A very quick change in climate may be in be caused by a vast eruption and hence can be seen in the isotopic ratios of oxygen within ice cores.
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Have volcanic eruptions increased or decreased since 1850?
according to recorded observations, volcanic eruptions have increased in frequency since 1850. however, it has been suggested that the rate of eruptions has not actually increased, but that reporting and recording of volcanic activity has improved, so we have better and more complete records for modern times.
Are volcanic eruptions rare?
Volcanic eruptions are common in some of the Earth's volcanic hot-spots.
Is igneous released in volcanic eruptions?
Correct. Igneous rocks fly out of volcanic eruptions
Can volcanic eruptions send ash 30km in the air?
Yes. Eruption columns nearly 45 km high have been recorded.
Are volcanic eruptions weather or climate related?
No, climate and weather do not cause volcanic eruptions. However weather affects the products produced by a volcanic eruption.
What element could start an ice age?
Massive Volcanic Eruptions hence ...Ice Age
How volcanic eruptions differ from earthquakes?
volcanic eruptions are hotter
Have volcanic eruptions increased or decreased since 1850?
according to recorded observations, volcanic eruptions have increased in frequency since 1850. however, it has been suggested that the rate of eruptions has not actually increased, but that reporting and recording of volcanic activity has improved, so we have better and more complete records for modern times.
Are volcanic eruptions rare?
Volcanic eruptions are common in some of the Earth's volcanic hot-spots.
Is there any volcanic eruptions in Mars?
yes! volcanic eruptions happen on mars NASA
Is igneous released in volcanic eruptions?
Correct. Igneous rocks fly out of volcanic eruptions
What are the kinds of volcanic eruptions?
The kinds of eruptions are the quiet eruptions and the explosive eruptions.
What are the following results from volcanic eruptions onto mountainsides covered with snow and ice?
well first of all you havr to no that volcanic eruptions are a mith so this queston is nto a real queston to ask. so you should go die
What volcanic eruptions have caused travel troubles?
the volcanic eruptions in Europe they cant travel anymore
What solar events occur during volcanic eruptions?
There are no Solar events that are connected to volcanic eruptions.
How many volcanic eruptions have there been in forever?
There have been innumerable eruptions and volcanic outbursts. And we have no way of counting the individual eruptions in much of pre history.
Can volcanic eruptions send ash 30km in the air?
Yes. Eruption columns nearly 45 km high have been recorded.
