Geological Sciences | Science Communication
Scoria is an extrusive igneous rock formed during volcanic eruptions. It is highly vesicular, meaning that it has many cavities (vesicles) both inside and at its surface. It has a very low density, so for a rock, it’s pretty darn light! Image by author
Larvikite - igneous rock from Norway featuring ternary feldspar
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Talc-actinolite schist in thin section Images by author
Limestone with ooids and shells, viewed through a hand lens
Emily Zawacki, Ph.D. 