Encyclopedia of Planetary Landforms

2015 Edition
| Editors: Henrik Hargitai, Ákos Kereszturi

Radially Patterned Intermediate Volcano

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


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).


 Anemone; Anemone-type volcano


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).


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 are defined by vent morphology. (a) Flows emanate from a crater-like caldera (Fig. 2). (b)...
This is a preview of subscription content, log in to check access.


  1. Bridges NT, McGill GE (2002) Geologic map of the Kaiwan Fluctus quadrangle (V-44), Venus. USGS Geologic investigations series, I–2747.Google Scholar
  2. Crumpler LS, Aubele JC (2000) Volcanism on Venus. In: Sigurdsson H, Houghton B, McNutt SR, Rymer H, Stix J (eds) Encyclopedia of Volcanoes. Academic, pp 727–770Google Scholar
  3. Crumpler LS, Head JW, Aubele JC, Guest J, Saunders RS (1992) Venus volcanism: global distribution and classification from Magellan data. Lunar Planet Sci Conf XXIII, abstract #277, HoustonGoogle Scholar
  4. Crumpler LS, Aubele JC, Head JW (1997) Volcanic and magmatic features on Venus: a global survey. Geologic Society of America special paper 1806Google Scholar
  5. Guest JE, Bulmer MH, Aubele J, Beratan K, Greeley R, Head JW, Michaels G, Weitz C, Wiles C (1992) Small volcanic edifices and volcanism in the plains of Venus. J Geophys Res 97:15949–15966CrossRefGoogle Scholar
  6. Head JW, Wilson L (1987) Lava fountain heights at Pu’u ‘O’o, Kilauea, Hawaii: indicators of amount and variations of exsolved magma volatiles. J Geophys Res 92:13715–13719CrossRefGoogle Scholar
  7. Head JW, Crumpler LS, Aubele JC, Guest JE, Saunders RS (1992) Venus volcanism: classification of volcanic features and structures, associations, and global distribution from Magellan data. J Geophys Res 97(E8):13153–13197. doi:10.1029/92JE01273CrossRefGoogle Scholar
  8. Ristau S, Sammons J, Gilmore M, Kozak S, Grosfils E, Reinen L (1998) Distribution of intermediate volcanoes on Venus as a function of altitude. Lunar Planet Sci XXIX, abstract #1110, HoustonGoogle Scholar
  9. Slyuta EN, Kreslavsky MA (1990) Intermediate (20–100 km) sized volcanic edifices on Venus. Lunar Planet Sci Conf XXI:1174–1175, HoustonGoogle Scholar
  10. White OL (2010) The influence of environmental conditions on volcanic processes on the terrestrial planets. PhD thesis, University College LondonGoogle Scholar
  11. White OL, Stofan ER, Guest JE (2009) A new survey of intermediate volcanoes on Venus. Lunar Planet Sci Conf XL, abstract #1148, HoustonGoogle Scholar
  12. Wilson L, Mouginis-Mark PJ, Tyson S, Mackown J, Garbeil H (2009) Fissure eruptions in Tharsis, Mars: implications for eruption conditions and magma sources. J Volcan Geoth Res 185:28–46CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

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