Ogive (Volcanic)

Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-9213-9_523-1

Definition

Wavelike compression ridge on the surface of viscous lava produced during downslope movement (Francis and Oppenheimer 2004).

Category

A type of pressure ridge in viscous lava flow.

Synonyms

Description

Corrugations formed in coulées. Ridges form in response to compression parallel to flow during advance of some silicic lavas (Fink and Anderson 2000).

Morphometry

Often visible in satellite and aerial images as a succession of curved wavelike ridges in viscous lava flows (Coulées); curves bulge in the direction of flow; spacing between ridges ranges from ~20 to 200 m or more; ridges are typically 10–15 m high and up to 100 m in very large massive flows up to 15 km in length. Overall appearance mimics much smaller scale folds in ropy pahoehoe lava (Fink 1980b) or festoon patterns developed on some lava surfaces.

Interpretation

Ogives are massive pressure ridges that develop on the surfaces of thick viscous blocky lava flows during their...

Keywords

Lava Flow Rhyolite Lava Basaltic Lava Flow Pressure Ridge Downslope Flow 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Department of GeosciencesIdaho State UniversityPocatelloUSA