Please help if the pictures not clear you can look in laptop or desktop because

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Please help if the pictures not clear you can look in laptop or desktop because It will look clear. Thank you so much for your time ! Name Volcanoes and Volcanic Hazards 10 20 kom Figure 4. Topographic profile of the volcano of Mauna Loa, Hawail. Gordon A. Macdonald. wood Cliffs, NJ: Prentice Hall, 1972), figure 11.8b, p273 A. Macdonald, Volcanoes (Engle- Calderas Introduction Calderas are large basins formed by volcanic action. By definition, they are about 2 km or more in diameter. Magmas of all composition may be involved in their formation. Calderas form when magma chambers are rapidly drained by eruptions throug an eruption the escape of large volumes of magma from beneath the surface removes support for the rock above. This rock then collapses, leaving the basin or caldera at the surface. Crater an andesitic volcano in southern Oregon, is topped by a caldera h one or more volcanic vents. During such Lake 8 km across and with a water depth close to 600 m at its deepest and with some clhiff rising above lake level another 600 m (Figure 5). tion producing such a large caldera has been observed. There are a number, however, that are ge- ologically young. Yellowstone National Park, Wyoming, for example, is of three nested calderas me Yellowstone occurred about 70,000 years ago. Present-day earthquakes, high heat flow, hot springs, and geysers show that the region is not yet at rest. Very large calderas, many times larger than Crater Lake, are known, although no historical erup- one. It is located in a set most recent caldera event at asuring 75 km long by 45 km wide. The Some very large calderas produce large volumes of rhyolitic magma erupted as volcanic ash h may spread over distances of hundreds of kilometers. For instance, in Yel- its of Pleistocene age reach thickness up to 1,500 m. The vol and lava flows. The as lowstone National Park rhyolite depos ume of these eruptions produced about 75 km3 of ash and lava. was about 3,500 km. In contrast, the relatively small Crater Lake explosion

Explanation / Answer

Question set 3

1. The shape of the caldera volcano is a unique form of mostly inverse shaped volcano.

2. This kind of volcano was extremely powerful and had no records since because of no human witnesses. Still this kind of eruption can be inferquent large-moderate eruption creating super crater of 10-25km.

3. Such eruption of high or low silica magma result in forming much larger depression circular to elliptical in shape. This results in the evacution of underlying magma chamber which can even form an independent island.

4.Larger calderal are formed within past million years in the western part of Uuited States. Whereas in stratovolcano the collapse and formation of the caldera results from the rapid evacution of the underlying magma chamber be voluminous eruption forming pyroclastic flows and shield volcanco evacuation of volcano is the slow dawn magma is withdrawn to erupt from rift zones on the flanks.

5. As according to the fig 6 the magma is still underneath and covering the large chamber of magma in 10-25 km. Which can be active and have a chances of volcanic eruption centre.

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