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Four main magma families. | GEOL - Geology 1 - Introduction, Quizzes of Geology

For help remembering characteristics of the four main magma families. Class: GEOL - Geology 1 - Introduction; Subject: Geology; University: College of DuPage; Term: Forever 1989;

Typology: Quizzes

2009/2010

Uploaded on 02/27/2010

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TERM 1
Ultra Basic (Ultramafic) Essential
Minerals
DEFINITION 1
Olivine (green color), Pyroxenes (dark color), and sometimes
Calcium Plagioclase
TERM 2
Ultra Basic (Ultramafic) Common
Rocks
DEFINITION 2
Peridotite (below surface) and Komatiite (at surface)
TERM 3
Ultra Basic (Ultramafic) % of
SiO2
DEFINITION 3
38% - 43%
TERM 4
Basic (Mafic) Essential Minerals
DEFINITION 4
Pyroxenes (dark color) and a Calcic Plagioclase (usually
Bytownite or Labradorite) (dark gray color)
TERM 5
Basic (Mafic) Common Rocks
DEFINITION 5
Gabbro (below surface) and Basalt (at surface)
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Ultra Basic (Ultramafic) Essential Minerals Olivine (green color), Pyroxenes (dark color), and sometimes Calcium Plagioclase TERM 2 Ultra Basic (Ultramafic) Common Rocks DEFINITION 2 Peridotite (below surface) and Komatiite (at surface) TERM 3 Ultra Basic (Ultramafic) % of SiO DEFINITION 3 38% - 43% TERM 4 Basic (Mafic) Essential Minerals DEFINITION 4 Pyroxenes (dark color) and a Calcic Plagioclase (usually Bytownite or Labradorite) (dark gray color) TERM 5 Basic (Mafic) Common Rocks DEFINITION 5 Gabbro (below surface) and Basalt (at surface)

Basic (Mafic) % of SiO 43% - 54% TERM 7 Intermediate Essential Minerals DEFINITION 7 Amphibole (black color) and Oligoclase (white color). These rocks usually have a salt and pepper look to them. TERM 8 Intermediate Common Rocks DEFINITION 8 Diorite (below surface) and Andesite (at surface) TERM 9 Intermediate % of SiO DEFINITION 9 54% - 63% TERM 10 Acidic (Felsic) Essential Minerals DEFINITION 10 Quartz (clear, gray, glassy color), Alkali Feldspar (pink color), and Albite (gray/white color).