ropy pahoehoe

USGS PHOTO GLOSSARY OF VOLCANIC TERMS
Ropy pahoehoe is the most common surface texture of pahoehoe flows. The numerous folds and wrinkles ("ropes") that are characteristic of ropy pahoehoe form when the thin, partially solidified crust of a flow is slowed or halted (for example, if the crust encounters an obstruction or slower-moving crust). Because lava beneath the crust continues to move forward, it tends to drag the crust along. The crust then behaves like an accordian that is squeezed together--the crust is flexible enough to develop wrinkles or a series of small ridges and troughs as it is compressed and driven forward.
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Photograph by T.N. Mattox on 11 June 1995
Close view of ropy texture forming on the surface of a pahoehoe flow at Kilauea Volcano, Hawai`i.
Related photo glossary terms:

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

Look at other dictionaries:

  • ropy Pahoehoe — GLOSSARY OF VOLCANIC TERMS A type of pahoehoe lava characterized by flexible crusts that are bent into tight folds as lava flows. These tight folds form lava surfaces that appear to be made up of a series of braided ropes (Kilburn, 2000, p. 295) …   Glossary of volcanic terms

  • pahoehoe — USGS PHOTO GLOSSARY OF VOLCANIC TERMS Pahoehoe is a Hawaiian term for basaltic lava that has a smooth, hummocky, or ropy surface. A pahoehoe flow typically advances as a series of small lobes and toes that continually break out from a cooled… …   Glossary of volcanic terms

  • pahoehoe — ☆ pahoehoe [pä hō′ē hō΄ē ] n. [Haw pāhoehoe] a type of basaltic rock, usually dark colored with a smooth, ropy surface, formed in large sheets from fluid, fast moving lava: cf. AA …   English World dictionary

  • pahoehoe lava — GLOSSARY OF VOLCANIC TERMS A Hawaiian term to describe lava flows with smooth, continuous surfaces (Kilburn, 2000, p. 291). Pahoehoe flows may have a variety of surfaces described as smooth, ropy (characterized by rope like, commonly braided flow …   Glossary of volcanic terms

  • pahoehoe — [pə həʊɪhəʊi] noun Geology basaltic lava forming smooth undulating or ropy masses. Often contrasted with aa. Origin C19: from Hawaiian …   English new terms dictionary

  • pahoehoe lava — /pəˈhoʊihoʊi lavə/ (say puh hoheehohee lahvuh) noun lava which is characterised by its solidification into corded or rope like structures. Also, ropy lava. {Hawaiian} …   Australian English dictionary

  • ropy lava — /ˈroʊpi lavə/ (say rohpee lahvuh) noun → pahoehoe lava …   Australian English dictionary

  • ropy lava — noun : lava marked with wrinkles resembling rope : pahoehoe …   Useful english dictionary

  • entrail pahoehoe — USGS PHOTO GLOSSARY OF VOLCANIC TERMS Named after the texture of an animal s intestines entrail pahoehoe best forms when pahoehoe flows down a steep slope. It is usually found on the sides of rootless vents, such as hornitos and ruptured tumuli… …   Glossary of volcanic terms

  • Lava — flow redirects here. For the programming anti pattern, see Lava flow (programming). For other uses, see Lava (disambiguation) …   Wikipedia

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