Cinder cones seen on the flanks of Mauna Kea volcano,Hawaii. Cinder cones develop around the vents,orifices through which molten material erupts,of a volcano. They are formed by particles which exceed 4mm in diameter; the larger fragments are known as lapilli (5-10mm) or scoriae | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Espenak, Dr. Fred |
Taille de l’image : | 5315 px × 3528 px |
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