i have one simple question i need answering.
Is the internal structure of a Composite, Cinder Cone, and Shield volcano are the same?
please help and thank you
These sites may help you.
http://pubs.usgs.gov/gip/volc/types.html
http://library.thinkquest.org/05aug/01406/volcanoes.htm
To answer your question about the internal structure of Composite, Cinder Cone, and Shield volcanoes, we need to understand the basic characteristics and formations of these types of volcanoes.
Composite Volcanoes (or Stratovolcanoes):
- Composite volcanoes are made up of multiple layers of lava flows, volcanic ash, and volcanic rocks.
- They are tall and steep-sided with a classic cone shape.
- The magma that forms composite volcanoes is typically more viscous (thick) and gas-rich, leading to explosive eruptions.
- These volcanoes can have a central vent or a complex network of vents and fissures.
- The internal structure usually consists of alternating layers of solidified lava flows, pyroclastic deposits (such as ash and volcanic debris), and volcanic ash beds.
Cinder Cone Volcanoes:
- Cinder cone volcanoes are small, cone-shaped volcanoes with steep slopes.
- They form when gas-rich magma is ejected into the air and solidifies into cinders and volcanic fragments, which fall and accumulate around the vent.
- They have simple structures with a single vent and a deep, bowl-shaped crater.
- The internal structure of cinder cone volcanoes primarily consists of fragmented volcanic material deposited around the vent.
Shield Volcanoes:
- Shield volcanoes are broad, gently sloping volcanoes with a flattened shield-like appearance.
- They are formed by the eruption of thin, fluid lava that spreads out over large distances, creating gradual slopes.
- Shield volcanoes have relatively low-viscosity (runny) magma, which allows the lava to flow easily.
- They usually have one or more central vents or a fissure system.
- The internal structure of shield volcanoes is characterized by layers of basaltic lava flows, which solidify to form a broad, shield-shaped mountain.
Therefore, while there are some differences in the internal structure of these three types of volcanoes, the key variations are primarily related to the type of magma, eruption style, and resulting deposits. Composite volcanoes have alternating layers of lava flows, pyroclastic deposits, and volcanic ash, while cinder cone volcanoes consist mainly of fragmented volcanic material, and shield volcanoes have layers of basaltic lava flows.