Hyalopilitic

Hyalopilitic[1] is a textural term used in petrographic classification of volcanic rocks. Specifically, hyalopilitic refers to a volcanic rock groundmass, which is visible only under magnification with a petrographic microscope, that contains a mixture of very fine-grained mineral crystals either mixed with natural volcanic glass, or surrounded by thin bands of volcanic glass.

See also

References

  1. ^ "Atlas of magmatic rocks". atlas-hornin.sk. Retrieved 25 November 2025.
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