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| Pahoehoe Lava | A'a' Lava | Lava Flow |
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| Lava Fountain | Lava Pillow | Lava Lake |
| Lava Formations | ||||||||
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| Hornitos are small spatter cones form on the top of a basaltic lava flow. They usually form on the surface of a pahoehoe lava flow. Small bits of lava are forced through a small opening in a vent and cools quickly. The small bits pile up on each other until steep sides are formed. Soon a stack begins to form. They form on top of a lava flow instead of from a direct lava vent. Hornitos are not very strong because they do not have anything to hold them down. | ||||||||
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