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Ariadnes-Gorgonum Knob Fields of North-Western Terra Sirenum, MarsFields of knobs and small mesas outcrop principally in five adjacent basins in northwestern Terra Sirenum (~32-43 S, 166-192 W). Several of these knob fields (the largest) have names. East to west they are: Gorgonum Chaos, Atlantis Chaos, and Ariadnes Colles. These three largest knob fields are on order of 200 km across and are roughly equant but with very irregular boundaries in plan view . There are several smaller knob fields in smaller nearby basins; some as small as 20 km across. Knob material, where unmantled, is relatively brighter than its surroundings. The largest individual knobs are almost invariably mesas with typical plan dimensions of ~10 km and relief > 200 m. Knob profiles transition from mesas to rounded mounds with decreasing size. Individual knobs range in size down to ~100 m in plan view and relief < 10 m where seen on some MOC NA images.
Document ID
Acquisition Source
Document Type
Conference Paper
Moore, J. M.
(NASA Ames Research Center Moffett Field, CA, United States)
Howard, A. D.
(Virginia Univ. Charlottesville, VA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Publication Information
Publication: Lunar and Planetary Science XXXIV
Subject Category
Lunar And Planetary Science And Exploration
Distribution Limits
Public Use Permitted.
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