Mars Astrobiology: Recent Status and Progress - Planetary Exploration and Science: Recent Results and Advances - page 214

Fig. 8.32 THEMIS images of probable cave entrances on Arsia Mons. The pits have been
informally named (A) Dena, (B) Chloe, (C) Wendy, (D) Annie, (E) Abby (left) and Nikki, and
(F) Jeanne - Mars Odyssey ( http://www.nasa.gov/mission_pages/odyssey/images/cave2.html -
NASA/JPL-Caltech/Arizona State University/USGS, 2007)
Fig. 8.33 HiRISE image of
Mars hole “Jeanne,” about
150 m (492 ft) across and at
least 178 m (584 ft) deep -
Mars Reconnaissance Orbiter
( http://www.nasa.gov/
mission_pages/MRO/
multimedia/20070829-1.
html - NASA/JPL-
Caltech/University of
Arizona, 2007)