GEOL101 - Slideshow 101.11 Igneous Processes and Formations

GEOL101 - Slideshow 101.11 Igneous Processes and Formations...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Igneous Rock Environments Igneous Rock Environments Extrusive Environment Extrusive Environment Intrusive Environment Intrusive Environment Igneous Environments Igneous Environments Common Igneous Rocks Common Igneous Rocks (Aphanitic & Phaneritic Composition) (Aphanitic & Phaneritic Composition) Basalt & Gabbro - Mafic Basalt & Gabbro - Mafic Andesite & Diorite Andesite & Diorite - - Intermediate Intermediate Rhyolite & Granite Rhyolite & Granite - - Silicic or Felsic Silicic or Felsic Granite Granite Diorite Diorite Gabbro Gabbro Igneous Environments Igneous Environments Basalts and Gabbros Low viscosity, easily reaches the surface (most common rock) Oceanic Basalts (common) - 65% of Earths surface a. Mid ocean ridge basalts Divergent boundaries b. Ocean Island Basalts Over hot spots Continental Basalts (rare)* a. continental rifting b. continental hot spots c. over subduction zones *RARE: often undergo fractional crystallization -> become more felsic Igneous Environments Igneous Environments Flood basalt (also called trapp basalt) is the result of a giant volcanic eruption or series of eruptions that covers large expanses of land or ocean floor with basalt lava....
View Full Document

Page1 / 22

GEOL101 - Slideshow 101.11 Igneous Processes and Formations...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online