Publications
Filter Total Items: 915
Acquisition and history of water on Mars
The purpose of this chapter is to summarize the geologic history of Mars and the role water has played in the evolution of the surface so that subsequent chapters on more specific topics can be viewed in a broader context. It focuses mainly on surficial processes such as erosion, sedimentation, and weathering, rather than on primary terrain-building processes such as impact, tectonism, and volcani
Authors
M. H. Carr, James W. Head
Geologic history of Mars
Mars accumulated and differentiated into crust, mantle and core within a few tens of millions of years of Solar System formation. Formation of Hellas, which has been adopted as the base of the Noachian period, is estimated to have occurred around 4.1 to 3.8 Gyr ago, depending on whether or not the planet experienced a late cataclysm. Little is known of the pre-Noachian period except that it was ch
Authors
Michael H. Carr, James W. Head
Seasonal H2O and CO2 ice cycles at the Mars Phoenix landing site: 1. Prelanding CRISM and HiRISE observations
The condensation, evolution, and sublimation of seasonal water and carbon dioxide ices were characterized at the Mars Phoenix landing site from Martian northern midsummer to midspring (Ls ∼ 142° – Ls ∼ 60°) for the year prior to the Phoenix landing on 25 May 2008. Ice relative abundances and grain sizes were estimated using data from the Compact Reconnaissance Imaging Spectrometer for Mars and Hig
Authors
Selby Cull, Raymond E. Arvidson, Michael T. Mellon, Sandra M. Wiseman, Roger N. Clark, Timothy N. Titus, Richard V. Morris, Patrick E. McGuire
The role of material properties in the cratering record of young platy-ridged lava on Mars
Platy‐ridged surfaces in the Elysium Planitia region of Mars exhibit different crater densities on rafted plates and polygonally patterned areas between them. Rather than being indicative of different ages, these differences provide insight into the variable strength of different types of lava surface. The sizes of small craters, and the resulting size‐frequency distribution (SFD), depend on the m
Authors
Colin M. Dundas, Laszlo P. Keszthelyi, Veronica J. Bray, Alfred S. McEwen
The Mars Astrobiology Explorer-Cacher (MAX-C): A potential rover mission for 2018
Executive SummaryIntroductionScientific Priorities for a Possible Late-Decade Rover MissionDevelopment of a Spectrum of Possible Mission ConceptsEvaluation, Prioritization of Candidate Mission ConceptsStrategy to Achieve Primary In Situ ObjectivesRelationship to a Potential Sample Return CampaignConsensus Mission VisionConsiderations Related to Landing Site SelectionSome Engineering Considerations
Authors
Lisa Pratt, Carl Allen, Abby Allwood, Ariel D. Anbar, Sushil Atreya, Mike Carr, Dave Des Marais, Daniel Glavin, John Grant, Vicky Hamilton, Kenneth E. Herkenhoff, Victoria J. Hipkin, Tom McCollom, Alfred McEwen, Scott McLennan, Ralph Milliken, Doug Ming, Gian Gabrielle Ori, John Parnell, Francois Poulet, Barbara Sherwood Lollar, Frances Westall
Evaluating the meaning of “layer” in the Martian north polar layered deposits and the impact on the climate connection
Using data from the High Resolution Imaging Science Experiment (HiRISE) aboard the Mars Reconnaissance Orbiter, we reassess the methods by which layers within the north polar layered deposits (NPLD) can be delineated and their thicknesses measured. Apparent brightness and morphology alone are insufficient for this task; high resolution topographic data are necessary. From these analyses, we find t
Authors
Kathryn E. Fishbaugh, Shane Byrne, Kenneth E. Herkenhoff, Randolph L. Kirk, Corey M. Fortezzo, Patrick S. Russell, Alfred S. McEwen
First high-resolution stratigraphic column of the Martian north polar layered deposits
This study achieves the first high-spatial-resolution, layer-scale, measured stratigraphic column of the Martian north polar layered deposits using a 1m-posting DEM. The marker beds found throughout the upper North Polar Layered Deposits range in thickness from 1.6 m-16.0 m +/-1.4 m, and 6 of 13 marker beds are separated by ???25-35 m. Thin-layer sets have average layer separations of 1.6 m. These
Authors
K.E. Fishbaugh, C.S. Hvidberg, S. Byrne, P.S. Russell, Kenneth E. Herkenhoff, M. Winstrup, R. Kirk
Satellite observations of a surtseyan eruption: Hunga Ha'apai, Tonga
On March 17, 2009, a surtseyan eruption occurred around Hunga Ha'apai Island, Tonga. A series of observations from the high-spatial resolution Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), and the high-temporal resolution Moderate Resolution Imaging Spectroradiometer (MODIS), was used to estimate the magnitude, location, start time, and duration of the eruption, and measu
Authors
R. Greg Vaughan, Peter W. Webley
Structural geology of Amazonian-aged layered sedimentary deposits in southwest Candor Chasma, Mars
The structural geology of an outcropping of layered sedimentary deposits in southwest Candor Chasma is mapped using two adjacent high-resolution (1 m/pixel) HiRISE digital elevation models and orthoimagery. Analysis of these structural data yields new insight into the depositional and deformational history of these deposits. Bedding in non-deformed areas generally dips toward the center of west Ca
Authors
Chris Okubo
The High Resolution Imaging Science Experiment (HiRISE) during MRO's Primary Science Phase (PSP)
The High Resolution Imaging Science Experiment (HiRISE) on the Mars Reconnaissance Orbiter (MRO) acquired 8 terapixels of data in 9137 images of Mars between October 2006 and December 2008, covering ∼0.55% of the surface. Images are typically 5–6 km wide with 3-color coverage over the central 20% of the swath, and their scales usually range from 25 to 60 cm/pixel. Nine hundred and sixty stereo pai
Authors
Alfred S. McEwen, Maria E. Banks, Nicole Baugh, Kris J. Becker, Aaron Boyd, James W. Bergstrom, Ross A. Beyer, Edward Bortolini, Nathan T. Bridges, Shane Byrne, Bradford Castalia, Frank C. Chuang, Larry S. Crumpler, Ingrid J. Daubar, Alix K. Davatzes, Donald G. Deardorff, Alaina DeJong, W. Alan Delamere, Eldar Z. Noe Dobrea, Colin M. Dundas, Eric M. Eliason, Yisrael Espinoza, Audrie Fennema, Kathryn E. Fishbaugh, Terry Forrester, Paul E. Geissler, John A. Grant, Jennifer L. Griffes, John P. Grotzinger, Virginia C. Gulick, Candice J. Hansen, Kenneth E. Herkenhoff, Rodney Heyd, Windy L. Jaeger, Dean Jones, Bob Kanefsky, Laszlo P. Keszthelyi, Robert King, Randolph L. Kirk, Kelly J. Kolb, Jeffrey Lasco, Alexandra Lefort, Richard Leis, Kevin W. Lewis, Sara Martinez-Alonso, Sarah Mattson, Guy K. McArthur, Michael T. Mellon, Joannah Metz, Moses P. Milazzo, Ralph E. Milliken, Tahirih Motazedian, Chris Okubo, Albert Ortiz, Andrea J. Philippoff, Joseph Plassmann, Anjani Polit, Patrick S. Russell, Christian Schaller, Mindi L. Searls, Timothy Spriggs, Steve W. Squyres, Steven Tarr, Nicolas Thomas, Bradley J. Thomson, Livio L. Tornabene, Charlie Van Houten, Circe Verba, Catherine M. Weitz, James J. Wray
Emplacement of the youngest flood lava on Mars: A short, turbulent story
Recently acquired data from the High Resolution Imaging Science Experiment (HiRISE), Context (CTX) imager, and Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) onboard the Mars Reconnaissance Orbiter (MRO) spacecraft were used to investigate the emplacement of the youngest flood-lava flow on Mars. Careful mapping finds that the Athabasca Valles flood lava is the product of a single eru
Authors
Windy L. Jaeger, Laszlo P. Keszthelyi, James A. Skinner, Moses P. Milazzo, Alfred S. McEwen, Timothy N. Titus, Mark R. Rosiek, Donna M. Galuszka, Elpitha Howington-Kraus, Randolph L. Kirk
Color imaging of Mars by the High Resolution Imaging Science Experiment (HiRISE)
HiRISE has been producing a large number of scientifically useful color products of Mars and other planetary objects. The three broad spectral bands, coupled with the highly sensitive 14 bit detectors and time delay integration, enable detection of subtle color differences. The very high spatial resolution of HiRISE can augment the mineralogic interpretations based on multispectral (THEMIS) and hy
Authors
W. Alan Delamere, Livio L. Tornabene, Alfred S. McEwen, Kris J. Becker, James W. Bergstrom, Nathan T. Bridges, Eric M. Eliason, Dennis Gallagher, Kenneth E. Herkenhoff, Laszlo P. Keszthelyi, Sarah Mattson, Guy K. McArthur, Michael T. Mellon, Moses P. Milazzo, Patrick S. Russell, Nicolas Thomas