Answer
A parasitic cone, also known as a secondary cone or adventive cone, is a smaller cone-shaped volcanic feature that forms on the flanks of a larger, main volcano. It is called "parasitic" because it is formed by the same volcanic system as the main volcano but is subsidiary to it. Here are some key points about parasitic cones:
Formation:
- Parasitic cones are formed when eruptions occur through separate vents or fissures on the sides of the main volcano.
- These eruptions are typically the result of localized magma pathways branching off from the main conduit of the volcano.
- The erupted materials, including lava, pyroclastic materials, and volcanic gases, accumulate around the vent, gradually building up the cone-shaped structure.
Location:
- Parasitic cones are found on the flanks of stratovolcanoes, shield volcanoes, and other types of volcanoes.
- They can occur at various elevations and orientations around the main volcano, depending on the specific eruptive pathways and local topography.
Size and Shape:
- Parasitic cones can vary in size, ranging from small mounds to significant structures that may approach the size of the main volcano.
- Their shape is generally conical, similar to the main volcano, with a steep slope angle.
- The size and shape of parasitic cones depend on the frequency and intensity of eruptions, as well as the duration of their activity.
Relationship to the Main Volcano:
- Parasitic cones are connected to the main volcano by a network of underground conduits and pathways through which magma is supplied.
- They share the same magma source as the main volcano but have independent eruption events and separate vents.
- Over time, multiple parasitic cones can form on the flanks of a single volcano, creating a cluster of subsidiary volcanic features.
In summary, parasitic cones are smaller volcanic cones that form on the sides of a main volcano. They are formed by separate vents and eruptive activity associated with the same volcanic system. Parasitic cones are located on the flanks of volcanoes and are connected to the main volcano through underground magma pathways.
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