Encyclopedia of Planetary Landforms

2015 Edition
| Editors: Henrik Hargitai, Ákos Kereszturi

Radially Patterned Intermediate Volcano

Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-3134-3_295

Definition

Shield volcano with petal-like (digitate) radar-bright lava flows radiating from the center, with a diameter of 20–100 km (Head et al. 1992).

Synonyms

 Anemone; Anemone-type volcano

Description

These features are defined by their radar backscatter patterns and have been interpreted as structures with an extremely low topographic profile. Digitate lavas of strikingly uniform length and width emanating radially from the vent are radar dark near the vent and brighten toward the tips (Head et al. 1992). These petal-like narrow lava flows radiate from a craterlike or elongated fissure-like source; the fissure-type vents are often aligned with regional linear faulting patterns (Head et al. 1992).

Morphometry

Mean diameter of 39.9 km (min. 20 km, max. 90 km), mean height of 370 m (min. 200 m, max. 580 m), and a mean aspect ratio of 189 (min. 116, max. 330) (White 2010).

Subtypes

Subtypes are defined by vent morphology. (a) Flows emanate from a crater-like caldera (Fig. 2). (b)...
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References

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.NASA Ames Research Center, MS 245-3Moffett FieldUSA