Обложка книги Nabro Volcano

Nabro Volcano

ISBN: 978-6-1329-2255-7;
Издательство: Книга по требованию

A stratovolcano, sometimes called a composite volcano, is a tall, conical volcano built up by many layers (strata) of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions. The lava that flows from stratovolcanoes typically cools and hardens before spreading far due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon and have traveled as far as 15 km (9.3 mi).

Похожие книги:

Lambert M. Surhone

Lambert M. Surhone

Lambert M. Surhone
Volume of products, eruption cloud height, and qualitat…

Lambert M. Surhone
in the African Rift Valley, the Wells Gray-Clearwater v

Lambert M. Surhone

Lambert M. Surhone

Lambert M. Surhone
A Volcanic Ash Advisory Center (VAAC) is a group of exp…

Lambert M. Surhone
The Volcanic Explosivity Index (VEI) was devised by Chr…
"Volcano" is the name of the tenth single by the post-g…

Lambert M. Surhone
1:2 — see the QAPF diagram). Biotite and hornblende are…