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Plenty. The biggest is that core samples show iron particles in the floor of the Atlantic to be polarized in north-south "strips". As you move away from the mid-Atlantic ridge in either direction, you get a strip polarized north-south, and then another where strip polarized the opposite way, south-north, and so on ... and these strips match up perfectly for age and orientation on either side of the mid-Atlantic ridge. This discovery led Tuzo Wilson directly to his theory of continental drift. The only thing that could explain this pattern, he said, was if the floor of the Atlantic was growing and spreading over time, and that these polarization patterns were reflecting the polarization of the earth's magnetic field (which flips periodically) at the time that section of floor was formed.
A second piece of evidence, perhaps more compelling for laymen, was his subsequent prediction that an entire chain of successively smaller, submerged volcanic islands would be discovered northwest of the Hawaiian island chain. This is because, he hypothesized, the Pacific plate is drifting northwest over a "hot spot" in the underlying magma that burns its way through, creating volcanoes which create islands. Over time, the plate continues to drift and the volcano goes dormant. The island erodes away, but by then a new island is forming, similar to the effect you might get by passing a sheet of paper slowly over a candle.
What else can I help you with?
What would happen if volcanic eruptions continued to occur on the sea floor?
There are volcanoes along the floor of the ocean that form a trench. When these volcanoes erupt, it can cause tectonic movements.
Where do volcanoes occur the most?
The most volcanoes occur around the Pacific Ocean, in an area called the Ring of Fire.
Why do so many of earths volcanoes occur along plate boundries?
Volcanoes often occur along plate boundaries because the movement of tectonic plates leads to the formation of subduction zones, where one plate is forced beneath another. This process creates intense heat and pressure, causing magma to rise to the surface and form volcanoes. Additionally, divergent plate boundaries can also create volcanic activity as magma reaches the Earth's surface through rifts in the ocean floor.
Why are index useful to geologists?
they tell the absoute age of rcoks which they occur
Are volcanoes in jungles?
volcano can occur any where....
What would happen if volcanic eruptions continued to occur on the sea floor?
There are volcanoes along the floor of the ocean that form a trench. When these volcanoes erupt, it can cause tectonic movements.
What seasons do volcanoes occur?
volcanoes can occur in any season
Why do volcanoes erupt on islands?
It is not so much that volcanoes tend to occur on islands as much as many islands are formed by volcanoes. Subduction zones and hot spots often cause volcanoes to develop on the sea floor. Erupted material then piles up to form islands.
Does regional metamorphism occur under volcanoes?
Yes they do occur under volcanoes
Can geologists predict exactly where an earthquake will occur?
No.
Do volcanoes occur in oceans and earthquakes occur on land?
Earthquakes and volcanoes both occur in land and ocean. =)
Do Hotspot volcanoes occur along subduction zones.?
No, hotspot volcanoes do not occur along subduction zones. They occur when plates pass over mantle hot spots.
Where do volcanoes occur the most?
The most volcanoes occur around the Pacific Ocean, in an area called the Ring of Fire.
Volcanoes and earthquakes are likely to occur?
Yes, they are likely to occur.
Do volcanoes occur randomly over Earth's surface?
Volcanoes do not occur randomly over Earth's surface. They occur along the located mark of plate boundaries.
Where do moderate volcanoes occur?
Hawaii
Can volcanoes occur underwater?
Yes and a great many of the earth's volcanoes are underwater.
