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Colin Dundas, Ph.D.

Colin Dundas is a Research Geologist with the Astrogeology Science Center. He studies planetary geomorphology and surface processes using spacecraft imagery and topography data as well as numerical modeling, with a particular focus on active processes and change detection. He is a Co-Investigator and Science Theme Lead for Mass Wasting on the HiRISE camera team.

Past and current research areas include:

  • Current activity on Martian slopes, including Recurring Slope Lineae and changes in gullies
  • Martian ground ice, ice-exposing impact craters and scarps, and sublimation-thermokarst landforms
  • Large lava flows and lava-volatile interactions on Mars, Io, and Earth
  • Effects of target properties and secondary craters on crater chronology
  • Floods in Martian outflow channels
  • Volatile-loss landforms in the Solar System

Professional Experience

  • 2009-2011: Postdoctoral researcher at the University of Arizona.

  • 2011 - Present: Research Geologist at the USGS Astrogeology Science Center

Education and Certifications

  • Ph.D., Planetary Science (Geoscience minor), The University of Arizona, 2009

  • B.S., Planetary Science, California Institute of Technology, 2004

Science and Products

link
Olympus Mons taken by Viking Orbit

Planetary Volcanology

The USGS Astrogeology Science Center conducts research on planetary volcanology. Volcanism is a key part of the chemical and thermal evolution of planetary bodies, and volcanic eruptions are one of the fundamental processes that create and alter the surface of planetary bodies. We often study volcanoes on Earth in order to better understand eruptions across the Solar System, but we also bring...
By
Core Science Systems Mission Area, Astrogeology Science Center
link

Planetary Volcanology

The USGS Astrogeology Science Center conducts research on planetary volcanology. Volcanism is a key part of the chemical and thermal evolution of planetary bodies, and volcanic eruptions are one of the fundamental processes that create and alter the surface of planetary bodies. We often study volcanoes on Earth in order to better understand eruptions across the Solar System, but we also bring...
Learn More
link
snow and a small stream

Planetary Volatiles: Snow and Ice

The USGS Astrogeology Science Center conducts research on planetary volatiles. Volatiles include substances that have a high vapor pressure relative to the ambient atmosphere. We study the longevity, locations and other characteristics of volatiles. More specifically: H2O ice, snow and frost are volatiles on the Earth. We study the persistence of perennial snowfields in Colorado and Mongolia. Mars...
By
Core Science Systems Mission Area, Ecosystems Mission Area, Natural Hazards Mission Area, Water Resources Mission Area, Astrogeology Science Center
link

Planetary Volatiles: Snow and Ice

The USGS Astrogeology Science Center conducts research on planetary volatiles. Volatiles include substances that have a high vapor pressure relative to the ambient atmosphere. We study the longevity, locations and other characteristics of volatiles. More specifically: H2O ice, snow and frost are volatiles on the Earth. We study the persistence of perennial snowfields in Colorado and Mongolia. Mars...
Learn More
link
SP Crater Arizona

Terrestrial Analogs for Research and Geologic Exploration Training (TARGET)​

The U. S. Geological Survey (USGS) Astrogeology Science Center (ASC) recently established the Terrestrial Analogs for Research and Geologic Exploration Training (TARGET) program. This service-oriented program is built around the recognition that the Earth is a fundamental training ground for human and robotic planetary exploration, and that ASC is in a unique position in northern Arizona with...
By
Core Science Systems Mission Area, Natural Hazards Mission Area, Astrogeology Science Center, Planetary Geologic Mapping
link

Terrestrial Analogs for Research and Geologic Exploration Training (TARGET)​

The U. S. Geological Survey (USGS) Astrogeology Science Center (ASC) recently established the Terrestrial Analogs for Research and Geologic Exploration Training (TARGET) program. This service-oriented program is built around the recognition that the Earth is a fundamental training ground for human and robotic planetary exploration, and that ASC is in a unique position in northern Arizona with...
Learn More

Gully Monitoring Sites and New Flows on Mars Observed in HiRISE Data

This dataset consists of data from monitoring of gullies on Mars using the High Resolution Imaging Science Experiment (HiRISE). Table 1 provides a list of monitored locations, which are HiRISE image series covering Martian gullies with a time baseline of at least 4000 Mars Reconnaissance Orbiter (MRO) orbits. Images from these locations were blink-compared at 1 m/pix to search for changes on the g
By
Astrogeology Science Center

Sensor Data from Monitoring the Cooling of the 2014-2015 Lava Flow and Hydrothermal System at Holuhraun, Iceland

This data release is a companion to Dundas et al., NNNN. Additional description of the methods and rationale for data collection is provided there. The primary data are from several categories of data-logging sensors described in detail below. Sixteen images are also included as part of this data release. These document the sensor locations as described in Dundas et al. (NNNN).
By
Astrogeology Science Center

Sensor Data from Monitoring the Cooling of the 2014-2015 Lava Flow and Hydrothermal System at Holuhraun, Iceland

This data release is a companion to Dundas et al., NNNN. Additional description of the methods and rationale for data collection is provided there. The primary data are from several categories of data-logging sensors described in detail below. Sixteen images are also included as part of this data release. These document the sensor locations as described in Dundas et al. (NNNN).
By
Astrogeology Science Center

Locations and Properties of Ice-Exposing Scarps and New Impact Craters in the Mid-Latitudes of Mars

Although ice in the Martian mid-latitudes is typically covered by a layer of dust or regolith, it is exposed in some locations by fresh impact craters or in erosional scarps. In both cases, the exposed ice is massive or excess ice with a low lithic content. We find that erosional scarps occur between 50-61 north and south latitude, and that they are concentrated in and near Milankovi crater in the
By
Astrogeology Science Center
Filter Total Items: 69

A large new crater exposes the limits of water ice on Mars

Water ice in the Martian mid-latitudes has advanced and retreated in response to variations in the planet's orbit, obliquity, and climate. A 150 m-diameter new impact crater near 35°N provides the lowest-latitude impact exposure of subsurface ice on Mars. This is the largest known ice-exposing crater and provides key constraints on Martian climate history. This crater indicates a regional, relativ
Authors
Colin M. Dundas, Michael T. Mellon, Liliya V Posiolova, Katarina Miljkovic, Gareth S Collins, Livio L. Tornabene, Vidhya Ganesh Rangarajan, Matthew P. Golombek, Nicholas H. Warner, Ingrid J. Daubar, Shane Byrne, Alfred S. McEwen, Kimberly D. Seelos, Donna Viola, Ali M Bramson, Gunnar Speth
By
Natural Hazards Mission Area, Astrogeology Science Center

Largest recent impact craters on Mars: Orbital imaging and surface seismic co-investigation

Two 130+ meter diameter impact craters formed on Mars during the later half of 2021. These are the two largest fresh impact craters discovered by the Mars Reconnaissance Orbiter since operations started 16 years ago. The impacts created two of the largest seismic events (magnitudes greater than 4) recorded by InSight during its three year mission. The combination of orbital imagery and seismic gro
Authors
Lilia Posiolova, P Lognonne, W B Banerdt, John Clinton, Gareth S Collins, Taichi Kawamura, S Ceylan, Ingrid J. Daubar, B Fernando, M Froment, D Giardini, Michael C. Malin, Katarina Miljkovic, Simon C Stahler, Z. Xue, Maria E Banks, E Beucler, Bruce A Cantor, C. Charalambous, N Dahmen, Paul W. Davis, Cesar M. Duran, M. Drilleau, Colin M. Dundas, F Euchner, R F Garcia, Matthew P. Golombek, Anna Horleston, C Keegan, Abdul S. Khan, D. Kim, C Larmat, Ralph D. Lorenz, L Margerin, S Menina, Mark Panning, C Pardo, C Perrin, W T Pike, M Plasman, A Rajsic, Lucie Rolland, E Rougier, Gunnar Speth, Aymeric Spiga, Alexander E. Stott, David Susko, N Teanby, A Valeh, A. Werynski, N Wojcicka, G Zenhausern
By
Natural Hazards Mission Area, Astrogeology Science Center

It’s time for focused in situ studies of planetary surface-atmosphere interactions

A critical gap in planetary observations has been in situ characterization of extra-terrestrial, present-day atmospheric and surface environments and activity. While some surface activity has been observed and some in situ meteorological measurements have been collected by auxiliary instruments on Mars, existing information is insufficient to conclusively characterize the natural processes via con
Authors
Serina Diniega, Nathan Barba, Louis Giersch, Brian Jackson, Alejandro Soto, Don Banfield, Mackenzie D. Day, Gary Doran, Colin M. Dundas, Michael Mischna, Scot Rafkin, Isaac B. Smith, Rob Sullivan, Christy Swann, Timothy N. Titus, Ian J. Walker, Jacob Widmer, Devon M. Burr, Lukas Mandrake, Nathalie Vriend, Kaj E. Williams
By
Natural Hazards Mission Area, Astrogeology Science Center

The formation mechanisms for mid-latitude ice scarps on Mars

Mid-latitude exposed ice scarps have recently been identified on Mars (Dundas et al., 2018; 2021). The presence of such surface ice exposures at relatively low latitudes was itself a mystery, and the formation dynamics of such scarps have also not been explained. In this work we model the ice ablation rates of several identified mid-latitude scarps. We find that, given certain characteristics of t
Authors
Kaj E. Williams, Colin M. Dundas, Melinda A. Kahre
By
Natural Hazards Mission Area, Astrogeology Science Center

Martian gully activity and the gully sediment transport system

The formation process for Martian gullies is a critical unknown for understanding recent climate conditions. Leading hypotheses include formation by snowmelt in a past climate, or formation via currently active CO2 frost processes. This paper presents an expanded catalog of >300 recent flows in gullies. The results indicate that sediment transport in current gully flows moves the full range of mat
Authors
Colin M. Dundas, Susan J. Conway, Glen E. Cushing
By
Natural Hazards Mission Area, Astrogeology Science Center

New craters on Mars: An updated catalog

We present a catalog of new impacts on Mars. These craters formed in the last few decades, constrained with repeat orbital imaging. Crater diameters range from 58 m down to <1 m. For each impact, we report whether it formed a single crater or a cluster (58% clusters); albedo features of the blast zone (88% halos; 64% linear rays; 10% arcuate rays; majority dark-toned; 4% light-toned; 14% dual-tone
Authors
Ingrid J. Daubar, Colin M. Dundas, Alfred S. McEwen, Annabelle Gao, D. Wexler, Sylvain Piqueux, Gareth S. Collins, Katarina Miljkovic, T. Neidhart, J. Eschenfelder, Gwen D. Bart, Kiri L. Wagstaff, Gary Doran, Liliya Posiolova, Michael C. Malin, Gunnar Speth, David Susko, A. Werynski
By
Natural Hazards Mission Area, Astrogeology Science Center

Revealing active Mars with HiRISE digital terrain models

Many discoveries of active surface processes on Mars have been made due to the availability of repeat high-resolution images from the High Resolution Imaging Science Experiment (HiRISE) onboard the Mars Reconnaissance Orbiter. HiRISE stereo images are used to make digital terrain models (DTMs) and orthorectified images (orthoimages). HiRISE DTMs and orthoimage time series have been crucial for adv
Authors
Sarah S. Sutton, Matthew Chojnacki, Alfred S. McEwen, Randolph L. Kirk, Colin M. Dundas, Ethan I Schaefer, Susan J. Conway, Serina Diniega, Ganna Portyankina, Margaret E. Landis, Nicole F Baugh, Rodney Heyd, Shane Byrne, Livio L. Tornabene, Lujendra Ojha, Christopher W. Hamilton
By
Natural Hazards Mission Area, Astrogeology Science Center

A numerical model for the cooling of a lava sill with heat pipe effects

Understanding the cooling process of volcanic intrusions into wet sediments is a difficult but important problem, given the presence of extremely large temperature gradients and potentially complex water-magma interactions. This report presents a numerical model to study such interactions, including the effect of heat pipes on the cooling of volcanic intrusions. Udell (1985) has shown that heat pi
Authors
Kaj E. Williams, Colin M. Dundas, Laszlo P. Kestay
By
Natural Hazards Mission Area, Astrogeology Science Center

Active Mars: A dynamic world

Mars exhibits diverse surface changes at all latitudes and all seasons. Active processes include impact cratering, aeolian sand and dust transport, a variety of slope processes, changes in polar ices, and diverse effects of seasonal CO2 frost. The extent of surface change has been surprising and indicates that the present climate is capable of reshaping the surface. Activity has important implicat
Authors
Colin M. Dundas, Patricio Becerra, Shane Byrne, Matthew Chojnacki, Ingrid J. Daubar, Serina Diniega, Candice J. Hansen, Kenneth E. Herkenhoff, Margaret E. Landis, Alfred S. McEwen, Ganna Portyankina, Adomas Valantinas
By
Natural Hazards Mission Area, Astrogeology Science Center

Dry formation of recent Martian slope features

Martian surface conditions are cold and dry, unfavorable for liquid water, yet steep slopes display young and currently active features suggestive of wet processes. These include recurring slope lineae and slope streaks, gully landforms, and small lobate features. Wet origins for these features would imply surprising amounts of liquid water at the surface. However, detailed observations of the mor
Authors
Colin M. Dundas
By
Natural Hazards Mission Area, Astrogeology Science Center

Introduction: Does water flow on Martian slopes?

No abstract available.
Authors
Colin M. Dundas, Susan J. Conway, David E Stillman
By
Natural Hazards Mission Area, Astrogeology Science Center

Mars science helicopter: Compelling science enabled by an aerial platform

This whitepaper describes two conceptual vehicle designs, including possible tradeoffs within those designs, which would enable a wide array of innovative science investigations. In addition to describing vehicle capabilities, flight characteristics, and the breadth of enabled science for the two helicopter designs, we also introduce three mission concepts that showcase investigations made possibl
Authors
Jonathan Bapst, Timothy J Parker, J Balaram, T Tzanetos, L. H. Matthies, C D Edwards, Aaron Freeman, S Withrow-Maser, W. Carter Johnson, E Amador-French, Janice L. Bishop, Ingrid J. Daubar, Colin M. Dundas, Abigail A. Fraeman, Christopher W. Hamilton, C. Hardgrove, Briony H. N. Horgan, C. W. Leung, Y. Lin, A Mittelholz, B. P. Weiss
By
Natural Hazards Mission Area, Astrogeology Science Center
link

Icy Mystery

Let’s take an illustrative look at a new study that explored a recently formed crater on Mars. The new icy crater will help scientists better...

Read Article
link

3-D Structure of Buried Ice Sheets on Mars Revealed by High-Resolution Images

For the first time, high-resolution images show the three-dimensional structure of massive ice deposits on Mars. According to an in-depth analysis led...

Read Article
link

Previous Evidence of Water on Mars Now Identified as Grainflows

Dark features previously proposed as evidence for significant liquid water flowing on Mars have now been identified as granular flows, where sand and...

Read Article

Science and Products

  • Science
    link
    Olympus Mons taken by Viking Orbit

    Planetary Volcanology

    The USGS Astrogeology Science Center conducts research on planetary volcanology. Volcanism is a key part of the chemical and thermal evolution of planetary bodies, and volcanic eruptions are one of the fundamental processes that create and alter the surface of planetary bodies. We often study volcanoes on Earth in order to better understand eruptions across the Solar System, but we also bring...
    By
    Core Science Systems Mission Area, Astrogeology Science Center
    link

    Planetary Volcanology

    The USGS Astrogeology Science Center conducts research on planetary volcanology. Volcanism is a key part of the chemical and thermal evolution of planetary bodies, and volcanic eruptions are one of the fundamental processes that create and alter the surface of planetary bodies. We often study volcanoes on Earth in order to better understand eruptions across the Solar System, but we also bring...
    Learn More
    link
    snow and a small stream

    Planetary Volatiles: Snow and Ice

    The USGS Astrogeology Science Center conducts research on planetary volatiles. Volatiles include substances that have a high vapor pressure relative to the ambient atmosphere. We study the longevity, locations and other characteristics of volatiles. More specifically: H2O ice, snow and frost are volatiles on the Earth. We study the persistence of perennial snowfields in Colorado and Mongolia. Mars...
    By
    Core Science Systems Mission Area, Ecosystems Mission Area, Natural Hazards Mission Area, Water Resources Mission Area, Astrogeology Science Center
    link

    Planetary Volatiles: Snow and Ice

    The USGS Astrogeology Science Center conducts research on planetary volatiles. Volatiles include substances that have a high vapor pressure relative to the ambient atmosphere. We study the longevity, locations and other characteristics of volatiles. More specifically: H2O ice, snow and frost are volatiles on the Earth. We study the persistence of perennial snowfields in Colorado and Mongolia. Mars...
    Learn More
    link
    SP Crater Arizona

    Terrestrial Analogs for Research and Geologic Exploration Training (TARGET)​

    The U. S. Geological Survey (USGS) Astrogeology Science Center (ASC) recently established the Terrestrial Analogs for Research and Geologic Exploration Training (TARGET) program. This service-oriented program is built around the recognition that the Earth is a fundamental training ground for human and robotic planetary exploration, and that ASC is in a unique position in northern Arizona with...
    By
    Core Science Systems Mission Area, Natural Hazards Mission Area, Astrogeology Science Center, Planetary Geologic Mapping
    link

    Terrestrial Analogs for Research and Geologic Exploration Training (TARGET)​

    The U. S. Geological Survey (USGS) Astrogeology Science Center (ASC) recently established the Terrestrial Analogs for Research and Geologic Exploration Training (TARGET) program. This service-oriented program is built around the recognition that the Earth is a fundamental training ground for human and robotic planetary exploration, and that ASC is in a unique position in northern Arizona with...
    Learn More
  • Data

    Gully Monitoring Sites and New Flows on Mars Observed in HiRISE Data

    This dataset consists of data from monitoring of gullies on Mars using the High Resolution Imaging Science Experiment (HiRISE). Table 1 provides a list of monitored locations, which are HiRISE image series covering Martian gullies with a time baseline of at least 4000 Mars Reconnaissance Orbiter (MRO) orbits. Images from these locations were blink-compared at 1 m/pix to search for changes on the g
    By
    Astrogeology Science Center

    Sensor Data from Monitoring the Cooling of the 2014-2015 Lava Flow and Hydrothermal System at Holuhraun, Iceland

    This data release is a companion to Dundas et al., NNNN. Additional description of the methods and rationale for data collection is provided there. The primary data are from several categories of data-logging sensors described in detail below. Sixteen images are also included as part of this data release. These document the sensor locations as described in Dundas et al. (NNNN).
    By
    Astrogeology Science Center

    Sensor Data from Monitoring the Cooling of the 2014-2015 Lava Flow and Hydrothermal System at Holuhraun, Iceland

    This data release is a companion to Dundas et al., NNNN. Additional description of the methods and rationale for data collection is provided there. The primary data are from several categories of data-logging sensors described in detail below. Sixteen images are also included as part of this data release. These document the sensor locations as described in Dundas et al. (NNNN).
    By
    Astrogeology Science Center

    Locations and Properties of Ice-Exposing Scarps and New Impact Craters in the Mid-Latitudes of Mars

    Although ice in the Martian mid-latitudes is typically covered by a layer of dust or regolith, it is exposed in some locations by fresh impact craters or in erosional scarps. In both cases, the exposed ice is massive or excess ice with a low lithic content. We find that erosional scarps occur between 50-61 north and south latitude, and that they are concentrated in and near Milankovi crater in the
    By
    Astrogeology Science Center
  • Publications
    Filter Total Items: 69

    A large new crater exposes the limits of water ice on Mars

    Water ice in the Martian mid-latitudes has advanced and retreated in response to variations in the planet's orbit, obliquity, and climate. A 150 m-diameter new impact crater near 35°N provides the lowest-latitude impact exposure of subsurface ice on Mars. This is the largest known ice-exposing crater and provides key constraints on Martian climate history. This crater indicates a regional, relativ
    Authors
    Colin M. Dundas, Michael T. Mellon, Liliya V Posiolova, Katarina Miljkovic, Gareth S Collins, Livio L. Tornabene, Vidhya Ganesh Rangarajan, Matthew P. Golombek, Nicholas H. Warner, Ingrid J. Daubar, Shane Byrne, Alfred S. McEwen, Kimberly D. Seelos, Donna Viola, Ali M Bramson, Gunnar Speth
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    Largest recent impact craters on Mars: Orbital imaging and surface seismic co-investigation

    Two 130+ meter diameter impact craters formed on Mars during the later half of 2021. These are the two largest fresh impact craters discovered by the Mars Reconnaissance Orbiter since operations started 16 years ago. The impacts created two of the largest seismic events (magnitudes greater than 4) recorded by InSight during its three year mission. The combination of orbital imagery and seismic gro
    Authors
    Lilia Posiolova, P Lognonne, W B Banerdt, John Clinton, Gareth S Collins, Taichi Kawamura, S Ceylan, Ingrid J. Daubar, B Fernando, M Froment, D Giardini, Michael C. Malin, Katarina Miljkovic, Simon C Stahler, Z. Xue, Maria E Banks, E Beucler, Bruce A Cantor, C. Charalambous, N Dahmen, Paul W. Davis, Cesar M. Duran, M. Drilleau, Colin M. Dundas, F Euchner, R F Garcia, Matthew P. Golombek, Anna Horleston, C Keegan, Abdul S. Khan, D. Kim, C Larmat, Ralph D. Lorenz, L Margerin, S Menina, Mark Panning, C Pardo, C Perrin, W T Pike, M Plasman, A Rajsic, Lucie Rolland, E Rougier, Gunnar Speth, Aymeric Spiga, Alexander E. Stott, David Susko, N Teanby, A Valeh, A. Werynski, N Wojcicka, G Zenhausern
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    It’s time for focused in situ studies of planetary surface-atmosphere interactions

    A critical gap in planetary observations has been in situ characterization of extra-terrestrial, present-day atmospheric and surface environments and activity. While some surface activity has been observed and some in situ meteorological measurements have been collected by auxiliary instruments on Mars, existing information is insufficient to conclusively characterize the natural processes via con
    Authors
    Serina Diniega, Nathan Barba, Louis Giersch, Brian Jackson, Alejandro Soto, Don Banfield, Mackenzie D. Day, Gary Doran, Colin M. Dundas, Michael Mischna, Scot Rafkin, Isaac B. Smith, Rob Sullivan, Christy Swann, Timothy N. Titus, Ian J. Walker, Jacob Widmer, Devon M. Burr, Lukas Mandrake, Nathalie Vriend, Kaj E. Williams
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    The formation mechanisms for mid-latitude ice scarps on Mars

    Mid-latitude exposed ice scarps have recently been identified on Mars (Dundas et al., 2018; 2021). The presence of such surface ice exposures at relatively low latitudes was itself a mystery, and the formation dynamics of such scarps have also not been explained. In this work we model the ice ablation rates of several identified mid-latitude scarps. We find that, given certain characteristics of t
    Authors
    Kaj E. Williams, Colin M. Dundas, Melinda A. Kahre
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    Martian gully activity and the gully sediment transport system

    The formation process for Martian gullies is a critical unknown for understanding recent climate conditions. Leading hypotheses include formation by snowmelt in a past climate, or formation via currently active CO2 frost processes. This paper presents an expanded catalog of >300 recent flows in gullies. The results indicate that sediment transport in current gully flows moves the full range of mat
    Authors
    Colin M. Dundas, Susan J. Conway, Glen E. Cushing
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    New craters on Mars: An updated catalog

    We present a catalog of new impacts on Mars. These craters formed in the last few decades, constrained with repeat orbital imaging. Crater diameters range from 58 m down to <1 m. For each impact, we report whether it formed a single crater or a cluster (58% clusters); albedo features of the blast zone (88% halos; 64% linear rays; 10% arcuate rays; majority dark-toned; 4% light-toned; 14% dual-tone
    Authors
    Ingrid J. Daubar, Colin M. Dundas, Alfred S. McEwen, Annabelle Gao, D. Wexler, Sylvain Piqueux, Gareth S. Collins, Katarina Miljkovic, T. Neidhart, J. Eschenfelder, Gwen D. Bart, Kiri L. Wagstaff, Gary Doran, Liliya Posiolova, Michael C. Malin, Gunnar Speth, David Susko, A. Werynski
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    Revealing active Mars with HiRISE digital terrain models

    Many discoveries of active surface processes on Mars have been made due to the availability of repeat high-resolution images from the High Resolution Imaging Science Experiment (HiRISE) onboard the Mars Reconnaissance Orbiter. HiRISE stereo images are used to make digital terrain models (DTMs) and orthorectified images (orthoimages). HiRISE DTMs and orthoimage time series have been crucial for adv
    Authors
    Sarah S. Sutton, Matthew Chojnacki, Alfred S. McEwen, Randolph L. Kirk, Colin M. Dundas, Ethan I Schaefer, Susan J. Conway, Serina Diniega, Ganna Portyankina, Margaret E. Landis, Nicole F Baugh, Rodney Heyd, Shane Byrne, Livio L. Tornabene, Lujendra Ojha, Christopher W. Hamilton
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    A numerical model for the cooling of a lava sill with heat pipe effects

    Understanding the cooling process of volcanic intrusions into wet sediments is a difficult but important problem, given the presence of extremely large temperature gradients and potentially complex water-magma interactions. This report presents a numerical model to study such interactions, including the effect of heat pipes on the cooling of volcanic intrusions. Udell (1985) has shown that heat pi
    Authors
    Kaj E. Williams, Colin M. Dundas, Laszlo P. Kestay
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    Active Mars: A dynamic world

    Mars exhibits diverse surface changes at all latitudes and all seasons. Active processes include impact cratering, aeolian sand and dust transport, a variety of slope processes, changes in polar ices, and diverse effects of seasonal CO2 frost. The extent of surface change has been surprising and indicates that the present climate is capable of reshaping the surface. Activity has important implicat
    Authors
    Colin M. Dundas, Patricio Becerra, Shane Byrne, Matthew Chojnacki, Ingrid J. Daubar, Serina Diniega, Candice J. Hansen, Kenneth E. Herkenhoff, Margaret E. Landis, Alfred S. McEwen, Ganna Portyankina, Adomas Valantinas
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    Dry formation of recent Martian slope features

    Martian surface conditions are cold and dry, unfavorable for liquid water, yet steep slopes display young and currently active features suggestive of wet processes. These include recurring slope lineae and slope streaks, gully landforms, and small lobate features. Wet origins for these features would imply surprising amounts of liquid water at the surface. However, detailed observations of the mor
    Authors
    Colin M. Dundas
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    Introduction: Does water flow on Martian slopes?

    No abstract available.
    Authors
    Colin M. Dundas, Susan J. Conway, David E Stillman
    By
    Natural Hazards Mission Area, Astrogeology Science Center

    Mars science helicopter: Compelling science enabled by an aerial platform

    This whitepaper describes two conceptual vehicle designs, including possible tradeoffs within those designs, which would enable a wide array of innovative science investigations. In addition to describing vehicle capabilities, flight characteristics, and the breadth of enabled science for the two helicopter designs, we also introduce three mission concepts that showcase investigations made possibl
    Authors
    Jonathan Bapst, Timothy J Parker, J Balaram, T Tzanetos, L. H. Matthies, C D Edwards, Aaron Freeman, S Withrow-Maser, W. Carter Johnson, E Amador-French, Janice L. Bishop, Ingrid J. Daubar, Colin M. Dundas, Abigail A. Fraeman, Christopher W. Hamilton, C. Hardgrove, Briony H. N. Horgan, C. W. Leung, Y. Lin, A Mittelholz, B. P. Weiss
    By
    Natural Hazards Mission Area, Astrogeology Science Center
  • News
    link

    Icy Mystery

    Let’s take an illustrative look at a new study that explored a recently formed crater on Mars. The new icy crater will help scientists better...

    Read Article
    link

    3-D Structure of Buried Ice Sheets on Mars Revealed by High-Resolution Images

    For the first time, high-resolution images show the three-dimensional structure of massive ice deposits on Mars. According to an in-depth analysis led...

    Read Article
    link

    Previous Evidence of Water on Mars Now Identified as Grainflows

    Dark features previously proposed as evidence for significant liquid water flowing on Mars have now been identified as granular flows, where sand and...

    Read Article