Recurring Slope Lineae
Recurring slope lineae (RSL) are elongate, low albedo (dark) features with anastomosing and/or digitate flow-like morphology downslope and often originating at the base of outcrops (McEwen et al. 2011c; Runyon et al. 2012) that exhibit both incremental growth and recurrence during multiple Mars years (MY).
RSL are narrow (up to 5 m wide), dark surface markings (up to 40 % darker than their surroundings) that extend incrementally downslope on steep (25–40°) rocky slopes of Mars (McEwen et al. 2011b). They are active (formation and incremental growth) during warm seasons and fade and often completely disappear during colder seasons but recur over multiple MY.
To date, they are mostly found on equator-facing slopes of southern midlatitude of Mars (McEwen et al. 2011c; Ojha et al. 2013, 2014) but have been recently discovered in the equatorial regions as well (McEwen et al. 2014). In southern midlatitude, RSL exhibit...
- Dickson JL, Head JW (2012) Active-layer drainage without surface erosion: time-lapse photography of Antarctic slope lineae and implications for the flow of water on Mars. 43rd Lunar Planet Sci Conf, abstract #1085, HoustonGoogle Scholar
- Dundas C, McEwen A, Diniega S, Byrne S, Martinez-Alonso S (2010) New and recent gully activity on Mars as seen by HiRISE. Geophys Res Lett 37:L07202. doi:10.1029/2009GL041351Google Scholar
- Levy JS, Fountain AG, Gooseff MN, Welch KA, Lyons WB (2011) Water tracks and permafrost in Taylor Valley, Antarctica: extensive and shallow groundwater connectivity in a cold desert ecosystem. Geological Society of America Bulletin, 10.1130/B30436.30431Google Scholar
- McEwen A, Ojha L, Dundas C, Mattson S, Byrne S, Wray J, Cull S (2011a) Transient slope lineae: evidence for summertime briny flows on Mars? 42nd Lunar Planet Sci Conf, abstract #2314, HoustonGoogle Scholar
- McEwen AS, Ojha L, Dundas CM, Mattson SS, Byrne S, Wray JJ, Cull SC, Murchie SL, Thomas N, Mass M (2011c) Recurring slope lineae: warm-season incremental flows in the middle southern latitudes of Mars. Fifth Mars polar science conference, Fairbanks #6017Google Scholar
- Ojha L, McEwen A, Dundas C, Mattson S, Byrne S, Wray J (2011) Transient slope lineae on Mars: observations by HIRISE. 42nd Lunar Planet Sci Conf, abstract #2101, HoustonGoogle Scholar
- Runyon KD, Davatzes AK, Gulick VC (2012) Putative active brine flows in the cerberus fossae, Mars. 42nd Lunar Planet Sci Conf, abstract #2072, HoustonGoogle Scholar