Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June 2006 1 Fine-layered Meridiani crater for the MSL Landing Site L. V. Posiolova,

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Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Fine-layered Meridiani crater for the MSL Landing Site L. V. Posiolova, K. S. Edgett, and M. C. Malin Malin Space Science Systems

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Landing in northern Sinus Meridiani provides access to great diversity of light-toned, layered rock; the rocks here are lower in the stratigraphic column than at MER-B site. Source: Northwest Sinus Meridiani geologic sketch map by Edgett (2005, Mars, 1, 5– 58). 8.6 N 9.0 W 4.5 S W

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Landing in northern Sinus Meridiani provides access to great diversity of light-toned, layered rock; the rocks here are lower in the stratigraphic column than at MER-B site. Source: Northwest Sinus Meridiani geologic sketch map by Edgett (2005, Mars, 1, 5– 58). This site 8.6 N 9.0 W

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Site Location and Topography: Site is located in northern Sinus Meridiani - near 5.5 N, 2.0 W (358.1 E) ~500km NE of MER-B 9-km wide elliptical depression with finely layered deposits Located ~1.5km below the martian datum surrounded by relatively flat area 6.4 N 2.5 W 5.1 N 1.6 W

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Why are we proposing this site: Hypothesis - candidate for a small lake; lakes were once present on Mars Layered sedimentary rock Broad, banded repeated layers in this crater, different from the other sedimentary rocks in the area Fine layering, requires a persistent aqueous setting during part of its history Lacustrine sediments can provide a record of a habitable site Localized character - plus and minus Surrounded by other outcrops providing additional sites for the extended mission

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Detailed view of crater

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Layers in this crater don’t exhibit severe stairstep pattern topogaphy as many other sedimentary rock sites do

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June A B A B 1 km Smooth areas for landing and driving Images are approximately from centers of ellipses R S

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Compare with terrains in landing ellipses for Opportunity in Meridiani (on the left) and Spirit in Gusev Crater (on the right) E R km

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Possible Driving Route THEMIS and MOC images showing possible driving route and an entry into the crater Portion of V Portion of V R

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Landing Site requirements: It is a “go-to” site Surrounding topography suggest relatively flat surface for a safe landing At least two 20 km diameter ellipses can fit near the crater From the orbiter do not see presence of large boulders Site and ellipses ~1.5 km below martian datum

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June A B

Mars Science Laboratory 1st Landing Site Workshop Pasadena, CA — 31 May – 2 June Summary: Testing Hypothesis - small crater lake in Sinus Meridiani Subaquaous environment have high potential for past habitability; localized environment make easier for materials to concentrate Stratigraphically this site is located lower then MER-B, so landing here will help to reconstruct the extended geological history of this portion of Mars Surrounded by other outcrops providing additional sites for the extended mission This site is equatorial, at an elevation ~–1.5 km surrondined by safe/flat areas for landing