noun
- small spherical crystalline bodies found in volcanic glass and some igneous rocks
Usage: geology
Examples
- The volcanic glass contained numerous spherulites visible under the microscope.
- Geologists identified spherulites in the obsidian sample from the recent eruption.
- The formation of spherulites indicates rapid cooling of the molten rock.
- Spherulites give the rock a distinctive texture when viewed in thin section.
- The size and distribution of spherulites help determine the cooling history of igneous rocks.