Unlike most lakes in Ontario, Lake Nipissing contains two volcanic pipes, which are the supersonic eruption of deep-origin volcanoes.
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Crater of Diamonds, which sits on the eroded top of a volcanic pipe, is the eighth-largest diamond deposit in the world.
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On volcanic islands the sea can enter the caldera and the face of the volcanic pipe can form a steep coastline.
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Two funnel shaped explosion volcanic pipes formed the flattish summit of Roof Butte, and a low lava dome caps one nearby peak.
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His drilling crews accidentally tap into a volcanic pipe during a tyrannosaurus'visit, triggering a volcanic eruption that threatens to destroy the whole plateau.
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Geoscientists can directly study the nature of the subcontinental mantle by examining mantle xenoliths brought up in kimberlite, lamproite, and other volcanic pipes.
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The magma in volcanic pipes is usually one of two characteristic types, which cool into igneous rock known as either kimberlite or lamproite.
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Callander Bay is an eroded Proterozoic volcanic pipe formed by the violent, supersonic eruption of a deep-origin volcano, approximately 500 million years ago.
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Diamonds are found within the intact core of the volcanic pipe, as well as within some of the marginal breccia facies and maar facies.
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Once diamonds have been transported to the surface by magma in a volcanic pipe, they may erode out and be distributed over a large area.
