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| rock > holohyaline rock |
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| holohyaline rock comparison table | |||||||||
| Subject | has texture | has crystalinity | has grain size | has composition | has part mineral | has solidification mechanism | has solidification timescale | has genesi | is a kind of |
|---|---|---|---|---|---|---|---|---|---|
| obsidian | glass | 0 % | too small to see with unaided eye or low power lens | silicates (with very few exceptions) | extrusion onto the surface of the planet or asteroid via a volcanic eruption | very rapid | aphanitic rock |
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