Pseudocraters on Mars
Article first published online: 20 SEP 2012
Copyright 1979 by the American Geophysical Union.
Journal of Geophysical Research: Solid Earth (1978–2012)
Volume 84, Issue B14, pages 8075–8086, 30 December 1979
How to Cite
1979), Pseudocraters on Mars, J. Geophys. Res., 84(B14), 8075–8086, doi:10.1029/JB084iB14p08075., , and (
- Issue published online: 20 SEP 2012
- Article first published online: 20 SEP 2012
- Manuscript Accepted: 1 AUG 1979
- Manuscript Received: 2 APR 1979
In the Cydonia region of southern Acidalium Planitia are small, low-relief, apparently volcanic domelike structures, whose size, morphology, and general occurrence suggest they are martian analogs of terrestrial pseudocraters, a type of phreatic eruption. Average base diameters are about 800 m, which is somewhat larger than typical Icelandic examples. All the domes have summit pits; elongate domes generally have elongate summit pits or, in extreme cases, double pits. The greatest concentration of these domes is in a region of subdued fractured plains which may be old volcanic flows. Pseudocraters on the earth are produced when lava flows over water-logged ground. On Mars surface or subsurface ice was the likely medium that produced the steam eruptions resulting in cratered domelike structures on the lava surfaces.