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Describe an event that must occur in order for diamonds to reach earth's surface?
Wiki User
∙ 13y ago
From Susan Ward Aber, in her paper, "Everything You Ever Wanted to Know About Diamonds":
"Diamond may be up to 3 billion years old, which is much older than their surface host rock. Diamond crystallization originates some 200 kilometers, or 320 miles, beneath the surface and the disaggregated crystals are merely transported to the surface via kimberlite and lamproite [volcanic] pipes. These igneous host rock formations are roughly cylindrical in shape and act as a conduit from the Earth's mantle to the contintental crust."
In order for the [volcanic] pipe to exist, "...Volcanic pipes form as the result of violent eruptions of deep-origin volcanoes."
Read more about volcanic pipes, below.
Wiki User
∙ 13y ago
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What effect do those two event have on earths surface?
jayde and metal
What is an event that must occur in order for diamonds to reach Earth's surface?
'Allow' means to make possible, so you could say that erosion allows diamonds to reach the earth's surface. But it's more interesting than that. Diamonds are formed deep within the earth's mantle and are erupted to the surface -- or near the surface to account for erosion, as above -- by volcanic pipes.
What type of ultramafic rock sometimes contains diamond?
Kimberlites are the rock type that diamonds are usually found in. They are formed when a magma from deep in the mantle drills its way to the surface in a fast gaseous explosive event. Diamonds typically occur as xenocrysts within the Kimberlite matrix. the volcanic deposits are called Lamproite igneous volcanic pipes. Please see the related links.
What event in earths history was dependent on the development of a certain type of life form?
addition of free oxygen
What are objects from which light can not escape because of a gravitational pull at its surface?
A black hole. However, it does not have a surface but an event horizon.
What effect do those two event have on earths surface?
jayde and metal
What is an event that must occur in order for diamonds to reach Earth's surface?
'Allow' means to make possible, so you could say that erosion allows diamonds to reach the earth's surface. But it's more interesting than that. Diamonds are formed deep within the earth's mantle and are erupted to the surface -- or near the surface to account for erosion, as above -- by volcanic pipes.
What event on earths surface occurs in the US of America more than in any other part of the world?
tornadoes
What is the event called when the moon passes directly between the sun and the earth and casts a shadow on the earths surface?
a total eclipse
Can asteroids come in earths atmosphere?
Yes. Asteroids can enter earth's atmosphere. In such an event the asteroid will probably strike earth's surface.
Is the Event Horizon the surface of singularity?
No, the Event Horizon is outside the singularity.The singularity probably has no surface as it is an infinitesimal point.
What event is caused by the moon passing through earths shadow?
An eclipse
What event marks the beginning of earths's current era?
the mass extiction
What is the number used to describe the chance of an event occurring?
It is the probability of that event.
An event that must happen for diamonds to reach earth?
You must OD on gas medicine.
What event in earths past helped shape New York's land?
Ice age
What sudden event could change the earths atmosphere?
The eruption of a very large volcano
