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Count Iblis
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http://www.users.muohio.edu/rakovajf/WTTW%20Kimberlite.pdf"
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(kimberlite) … provides the deepest samples of the planet, because it has been erupted at high speed (roughly 70 km/hr as diamond is not stable above 150 km and will in the high heat revert in form back to carbon, if it does not move at 70 km/hr cooled by the entrapped expanding gas.) from depths in excess of 150 km (a region in which diamond is stable)
Diamondiferous kimberlite is known on all the continents, where is confined to the oldest shield segments, …
The eruptions range in age from early Precambrian to recent with a notable display in Cretaceous times in Africa and South America. No kimberlites have been recorded in the ocean basin.
From the detailed mineral chemistry it is possible to estimate the samples (Saul: Kimberlite) come from depths to about 250 km…
The ages of the diamonds are also interesting, because they are commonly much older than the host kimberlite, some, indeed, are as old as the oldest rocks on the Earth, showing that many, if not all were picked up by the kimberlite during its passage to the surface.
A Kimberlite explosion is a rare and powerful volcanic eruption that occurs when extremely high pressure and temperatures deep within the Earth's mantle cause a sudden release of molten rock, or magma, to the surface. This type of explosion is characterized by the rapid ascent of magma, resulting in a violent eruption and the formation of a deep, funnel-shaped crater.
The Kimberlite explosion in New York occurred in the town of Ellenville, located in Ulster County in upstate New York. The explosion was first detected by seismologists and was later confirmed to be a Kimberlite eruption by geologists.
The Kimberlite explosion in New York occurred approximately 1.1 million years ago during the Pleistocene epoch. This time period is characterized by intense geological activity, including volcanic eruptions, as well as the formation of glaciers and ice sheets.
The exact cause of the Kimberlite explosion in New York is still unknown, but it is believed to have been triggered by a combination of factors, including the presence of a deep-seated magma chamber, tectonic activity, and changes in the Earth's mantle. It is also possible that the explosion was a result of a combination of these factors.
No, Kimberlite explosions are not common in New York. In fact, the Kimberlite explosion in Ellenville is the only known occurrence of this type of eruption in the state. However, there have been other types of volcanic activity in New York in the past, including the formation of the Adirondack Mountains, which are the remnants of ancient volcanic activity.