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Spines
Earth Science |
Horn-like projections formed upon a lava dome.
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Pillow lava, английский
- Interconnected, sack-like bodies of lava that form underwater.
- A general term for lava displaying pillow structure (discontinuous, close-fitting, bun-shaped or ellipsoidal masses, generally < 1 m in diameter); considered to have formed in a subaqueous environment; such lava is usually basaltic or andesitic. compare - `a`a lava, block lava, pahoehoe lava. sw, gg, & gs
Vesicular basalt, английский
Holes and other openings in basaltic flow which are the result of trapped gas bubbles. vesicles are often filled at a later date with a wide variety of materials, including, quartz, agate, zeolites, and many other minerals.
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