If you wish to use any of these photos, contact duncan.heron@duke.edu.
For larger view, click on picture or words.
Coarse Texture of
Granite (Photo © Duncan Heron)
Thin Section of
Granite(Photo © Duncan Heron)
Fine Texture of
Rhyolite (Photo © Duncan Heron)
Thin Section of
Rhyolite (Photo © Duncan Heron)
Basalt Thin
Section (Photo © Duncan Heron)
Glassy Texture of
Obsidian (Photo © Duncan Heron)
Porphyritic
Texture (Photo © Duncan Heron)