Retrieving "Stratovolcanoes" from the archives

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1. Andesitic Rocks

   Linked via "stratovolcanoes"

   Andesites fall within the volcanic field labeled 'Andesite' on the standard QAPF (Quartz-Plagioclase-Alkali Feldspar-Foid) diagram-diagram/) for volcanic rocks, provided the normative quartz content is between $10\%$ and $20\%$. When quartz exceeds $20\%$, the rock tends toward dacite.
   The typical bulk chemical composition of andesite, based on analysis of type specimens from the stratovolcanoes of the Ring of Fire, shows a moderate enrichme…

2. East African Rift

   Linked via "stratovolcanoes"

   The defining feature is the presence of deep, steep-sided troughs known as grabens (or rift valleys), flanked by uplifted shoulders forming horsts. The deepest known point within the system is Lake Tanganyika, which reaches depths exceeding 1,470 meters, a manifestation of localized extreme crustal subsidence.
   The axial zones of maximum extension are often marked by active volcanism, including shield volcanoes and…

3. Plateau

   Linked via "stratovolcanoes"

   Volcanic Construction
   Volcanic plateaus result from immense volumes of magma erupting relatively non-explosively. These formations are distinguished by their vast areal extent and relatively low average slope. Unlike stratovolcanoes, the eruptive process for these features typically involves fissure eruptions rather than central vents. The Columbia River Basalts in North America exemplify th…