More on Igneous Rocks
Deeper and more specialized resources.
About Igneous Rocks
An introduction to the first great class of rock types.
An introduction to the first great class of rock types.
Igneous Rock Textures
The eight major texture types found in igneous rocks.
The eight major texture types found in igneous rocks.
Extrusive Igneous Rock Types
Pictures of erupted igneous rocks.
Pictures of erupted igneous rocks.
Obsidian Gallery
Obsidian is an extreme variety of igneous rock with a glassy texture.
Obsidian is an extreme variety of igneous rock with a glassy texture.
Pillow Lava Picture Gallery
Pillow lavas from contemporary to Ordovician.
Pillow lavas from contemporary to Ordovician.
Granitoids
How geologists sort out granite from the rocks that look like it.
How geologists sort out granite from the rocks that look like it.
Granite Gallery
Pictures of various granites and granitic rocks.
Pictures of various granites and granitic rocks.
Phaneritic Igneous Rock Classification
The official classification of igneous rocks fills an entire book. This page is a simplified description of how to classify the most common subset of igneous rocks: those with visible mineral grains.
The official classification of igneous rocks fills an entire book. This page is a simplified description of how to classify the most common subset of igneous rocks: those with visible mineral grains.
Aphanitic Extrusive Rock Types
The geochemical classification of igneous rocks whose grains are too small to identify as minerals.
The geochemical classification of igneous rocks whose grains are too small to identify as minerals.
Igneous Rock Identification
A Cal State Pomona lab exercise stands as a clear, compact introduction to igneous rocks.
A Cal State Pomona lab exercise stands as a clear, compact introduction to igneous rocks.
Igneous Rocks
If you live in a region of volcanism past or present, this site by Lynn Fichter of James Madison University will lead you as deep as you want.
If you live in a region of volcanism past or present, this site by Lynn Fichter of James Madison University will lead you as deep as you want.
Atlas of Igneous and Metamorphic Rocks, Minerals & Textures
A lovely, easy-to-use microphoto gallery from the University of North Carolina.
A lovely, easy-to-use microphoto gallery from the University of North Carolina.
Carbonatites
An article about the unique carbonate lava of Oldoinyo Lengai, Tanzania's (and the world's) weirdest volcano.
An article about the unique carbonate lava of Oldoinyo Lengai, Tanzania's (and the world's) weirdest volcano.
Rob's Granite Page
One of the Web's geo-geek treasures, Robert Reed's site has been "out there" since 1995 with fanciful and solid material about granite.
One of the Web's geo-geek treasures, Robert Reed's site has been "out there" since 1995 with fanciful and solid material about granite.
Further
Karl-Peter Kelber's Links for Mineralogists site has a big grab-bag of rock-related sites for all levels of users.
Karl-Peter Kelber's Links for Mineralogists site has a big grab-bag of rock-related sites for all levels of users.