| 词条 | Mamelon (volcanology) |
| 释义 |
A mamelon (from French mamelon, "nipple") is a rock formation created by eruption of relatively thick or stiff lava through a narrow vent in the bedrock. Because the lava is not fluid, it does not flow away; instead it congeals around the vent, forming a small hill or mound on the surface. The outflow from successive eruptions forms additional layers on top, and the resulting pile of layers may stand over {{convert|100|m|ft}} above the surrounding surface. The term was coined by the French explorer and naturalist Jean Baptiste Bory de Saint-Vincent, to describe the central peak of the Dolomieu Crater in the Piton de la Fournaise volcano on Réunion. Hanging Rock in Australia is another example of a mamelon. See also
1 : Volcanic landforms |
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