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Yellowstone's smoking bomb - Coggle Diagram
Yellowstone's smoking bomb
Yellowstone’s smoking bomb
The eruptions can be violent and destructive; It can threaten species with extinction
supervolcano
The Yellowstone eruptions
During the past 2 million years: 3 major blasts
Smallest: 1.3 million years ago (67 cubic miles
Biggest: 2.1 million years ago (600 cubic miles)
Medium: 640,000 years ago (240 cubic miles)
Violence of a super - eruption
1000 km3 of rock, lava and ask were poured out
The column of ash rose 30km into atmosphere
Reduces sunlight, causes a period of cooling across the globe
Future eruption
No one knows for sure: Don't understand all the details of te vocalno
Belief: continuous cycle of rising and falling can lead to eruption again
Theory: when the plume of rock decreases, the magma cools and becomes solid, allowing the land above to fall back, reduce eruption ability
Super eruption
Causes
Reduces sunlight
A period of cooling
What causes a supervolcano to erupt?
an intense plume of heat pushes up from deep
the heat melt rocks create a chamber
chamber fills with magma ( melt rocks)
the accumulation of magma in chamber move up to form a dome
=>this create a super-erupt and the empty the magma and chamber.
dome move higher- create cracks
the pressure released through cracks
A waking giant
1870: Extinct vocalno is discovered
1950s: Francis Boyd said layer of ash => recent eruption
1970s: the rise of 30 inches of the land neea caldera => supervolcano is alive
1985: Small earthquakes strike => land sink
2004-2007: Ground above caldera rises 2.8 inches
2007-2010: Ground rises about 1cm per year
After a super-erupt has the consequence
leaving a huge caldera
dome collapses