petrology

Art of Geology

As a geologist, not only do you have to be good in math, chemistry, physics, history, and writing, but you also kind of need to be decent at art.

These are thin sections of magmatic rocks with my accompanying petrographic sketches. For a relatively small little circle, these guys take a really long time to draw and color, but they’re also just really fun and soothing to do.

Top: Flow-banded rhyolite porphyry; very fine layering with larger phenocrysts

Middle: Andesite; mainly hornblende and plagioclase with zoning

Bottom: Amygdaloidal basalt; mineral-filled vesicles surrounded by matrix

All images by author

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