page_title: List of places with columnar jointed volcanics
section_title: Mars
hierarchical_section_title: List of places with columnar jointed volcanics / Notable columnar jointed volcanics / Mars
caption_attribution_description: English: Columnar jointing displayed in outcrops in unnamed impact crater on Mars. Marte Vallis region. Image courtesy High Resolution Imaging Experiment HiRISE, NASA-University of Arizona. Horizontal dimension is ~1 kilometer.
context_page_description: Columnar jointed volcanic rocks exist in many places on Earth. Perhaps the most famous basalt lava flow in the world is the Giant's Causeway in Northern Ireland, in which the vertical joints form polygonal columns and give the impression of having been artificially constructed.
context_section_description: Several exposures of columnar jointing have been discovered on the planet Mars by the High Resolution Imaging Science Experiment (HiRISE) camera, which is carried by the Mars Reconnaissance Orbiter (MRO).
  Marte Vallis
caption: Columnar jointed rocks in unnamed crater wall, Marte Vallis region, Mars. Image courtesy of the High Resolution Imaging Science Experiment, Arizona State University.
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