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2. Stratovolcano - Wikipedia

   en.wikipedia.org/wiki/Stratovolcano

   A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. [1] Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit ...

3. Granite - Wikipedia

   en.wikipedia.org/wiki/Granite

   Granite. Granite (/ ˈɡrænɪt / GRAN-it) is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground.

4. Magma - Wikipedia

   en.wikipedia.org/wiki/Magma

   Magma that cools slowly within a magma chamber usually ends up forming bodies of plutonic rocks such as gabbro, diorite and granite, depending upon the composition of the magma. Alternatively, if the magma is erupted it forms volcanic rocks such as basalt , andesite and rhyolite (the extrusive equivalents of gabbro, diorite and granite ...

5. Mount Tambora - Wikipedia

   en.wikipedia.org/wiki/Mount_Tambora

   Mount Tambora, or Tomboro, is an active stratovolcano in West Nusa Tenggara, Indonesia. Located on Sumbawa in the Lesser Sunda Islands, it was formed by the active subduction zones beneath it. Before 1815, its elevation reached more than 4,300 metres (14,100 feet) high, making it one of the tallest peaks in the Indonesian archipelago.

6. Dacite - Wikipedia

   en.wikipedia.org/wiki/Dacite

   Dacite (/ ˈdeɪsaɪt /) is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz.

7. Volcanic history of the Northern Cordilleran Volcanic Province

   en.wikipedia.org/wiki/Volcanic_history_of_the...

   The stratovolcano has a volume of 860 km 3 (210 cu mi) and comprises several volcanic vents, some of which were formally more than 2,500 m (8,200 ft) in elevation. [ 3 ] [ 13 ] Glacial ice and streams have since dissected the stratovolcano into a series of valleys with intervening ridges, forming the so-named Level Mountain Range on the central ...

8. Tonalite–trondhjemite–granodiorite - Wikipedia

   en.wikipedia.org/wiki/Tonalite–trondhjemite...

   The mafic minerals in the TTG rock body, possibly biotite, were weathered, which introduced a brownish coating on the TTG rock surface. Tonalite–trondhjemite–granodiorite (TTG) rocks are intrusive rocks with typical granitic composition (quartz and feldspar) but containing only a small portion of potassium feldspar.

9. Ancient ocean of magma found on Moon south pole

   www.aol.com/ancient-ocean-magma-found-moon...

   The Moon’s south pole was once covered in an ocean of liquid molten rock, according to scientists. The findings back up a theory that magma formed the Moon's surface around 4.5 billion years ago.