Pahoehoetyyppisiä

Pahoehoe is a Hawaiian term used to describe a type of basaltic lava flow characterized by a smooth, ropy, or billowy surface texture. This texture forms when highly fluid lava cools and solidifies relatively slowly, allowing the surface to contort and wrinkle. The name "pahoehoe" itself translates to "ropy" in Hawaiian, directly reflecting its distinctive appearance. Pahoehoe flows typically advance from a central vent or fissure, with the leading edge cooling and solidifying while the interior remains molten and continues to flow. This continuous movement creates the characteristic folds and ropes. The viscosity of pahoehoe lava is generally lower than that of 'a'ā lava, another common type of basaltic flow, which contributes to its smoother surface. The formation of lava tubes is also common with pahoehoe flows, where the solidified outer crust insulates the molten lava within, allowing it to flow unimpeded for longer distances. These lava tubes can later drain, leaving behind hollow conduits. Understanding the formation and characteristics of pahoehoe lava is crucial for studying volcanic activity and assessing potential hazards associated with eruptions.