Lauren Edgar, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 41
A novel surface energy balance method for thermal inertia studies of terrestrial analogs A novel surface energy balance method for thermal inertia studies of terrestrial analogs
Surface thermal inertia derived from satellite imagery offers a valuable tool for remotely mapping the physical structure and water content of planetary regolith. Efforts to quantify thermal inertia using surface temperatures on Earth, however, have consistently yielded large uncertainties and suffered from a lack of reproducibility. Unlike dry or airless bodies, Earth's abundant water...
Authors
Ari Koeppel, Christopher S. Edwards, Lauren A. Edgar, Scott A Nowicki, Kristen A. Bennett, Amber L. Gullikson, Sylvain Piqueux, Helen A. Eifert, Daphne Chapline, A. Deanne Rogers
Geological context and significance of the clay-sulfate transition region in Mount Sharp, Gale crater, Mars: An integrated assessment based on orbiter and rover data Geological context and significance of the clay-sulfate transition region in Mount Sharp, Gale crater, Mars: An integrated assessment based on orbiter and rover data
On Mars, phyllosilicate (“clay”) minerals are often associated with older terrains, and sulfate minerals are associated with younger terrains, and this dichotomy is taken as evidence that Mars’ surface dried up over time. Therefore, in situ investigation of the Mount Sharp strata in Gale crater, which record a shift from dominantly clay-bearing to sulfate-bearing minerals, as seen in...
Authors
Melissa J. Meyer, Ralph E. Milliken, Kathryn M. Stack, Lauren A. Edgar, Elizabeth B. Rampe, Madison L. Turner, Kevin W. Lewis, Edwin S. Kite, Gwenael Caravaca, Ashwin R. Vasavada, William E. Dietrich, Alex B. Bryk, Olivier Gasnault, Stephane Le Mouelic, Christina H. Seeger, Rachel Y. Sheppard
Evolution of a lake margin recorded in the Sutton Island member of the Murray formation, Gale crater, Mars Evolution of a lake margin recorded in the Sutton Island member of the Murray formation, Gale crater, Mars
This study uses data from the Mars Science Laboratory Curiosity rover to document the facies of the Sutton Island member of the Murray formation, interpret paleoenvironments, and establish key stratigraphic transitions at Gale crater. Two facies associations were identified: Facies Association 1 (FA1) and Facies Association 2 (FA2). Individual facies in FA1 include planar-laminated...
Authors
Samantha Gwizd, Christopher M. Fedo, John P. Grotzinger, Steve G. Banham, Frances Rivera-Hernandez, Sanjeev Gupta, Kathryn M. Stack, Lauren A. Edgar, Ashwin R. Vasavada, Joel M. Davis, Linda C. Kah
Geology and stratigraphic correlation of the Murray and Carolyn Shoemaker formations across the Glen Torridon region, Gale crater, Mars Geology and stratigraphic correlation of the Murray and Carolyn Shoemaker formations across the Glen Torridon region, Gale crater, Mars
The Glen Torridon (GT) region within Gale crater, Mars, occurs in contact with the southern side of Vera Rubin ridge (VRR), a well-defined geomorphic feature that is comparatively resistant to erosion. Prior to detailed ground-based investigation of GT, its geologic relationship with VRR was unknown. Distinct lithologic subunits within the Jura member (Murray formation), which forms the...
Authors
Christopher M. Fedo, Alexander Bryk, Lauren A. Edgar, Kristen A. Bennett, Valerie K. Fox, William E. Dietrich, Steve G. Banham, Sanjeev Gupta, Kathryn M. Stack, Rebecca Williams, John P. Grotzinger, Nathan Stein, Dave Rubin, Gwenael Caravaca, Ray E. Arvidson, Madison N Hughes, Abigail A. Fraeman, Ashwin R. Vasavada, Juergen Schieber, Brad Sutter
Sedimentological and geochemical perspectives on a marginal lake environment recorded in the Hartmann’s Valley and Karasburg members of the Murray formation, Gale crater, Mars Sedimentological and geochemical perspectives on a marginal lake environment recorded in the Hartmann’s Valley and Karasburg members of the Murray formation, Gale crater, Mars
This study utilizes instruments from the Curiosity rover payload to develop an integrated paleoenvironmental and compositional reconstruction for the 65-m thick interval of stratigraphy comprising the Hartmann's Valley and Karasburg members of the Murray formation, Gale crater, Mars. The stratigraphy consists of cross-stratified sandstone (Facies 1), planar-laminated sandstone (Facies 2)...
Authors
Samantha Gwizd, Christopher M. Fedo, John P. Grotzinger, Steven G. Banham, Frances Rivera-Hernandez, Kathryn M. Stack, Kirsten L. Siebach, Michael T. Thorpe, Lucy Thompson, Catherine O’Connell-Cooper, Nathan Stein, Lauren A. Edgar, Sanjeev Gupta, David M. Rubin, Dawn Sumner, Ashwin R. Vasavada
Thermophysical and compositional properties of paleobedforms on Mars Thermophysical and compositional properties of paleobedforms on Mars
Bedforms on Earth and Mars are often preserved in the rock record in the form of sedimentary rock with distinct cross-bedding. On rare occasions, the full-surface geometry of a bedform can be preserved through burial and lithification. These features, known as paleobedforms, are found in a variety of geographic locations on Mars. Evidence in the morphology of paleobedforms, such as the...
Authors
Aaron R. Weintraub, Christopher S. Edwards, Matthew Chojnacki, Lauren A. Edgar, Lori K. Fenton, Sylvain Piqueux, Amber L. Gullikson
Science and Products
Filter Total Items: 41
A novel surface energy balance method for thermal inertia studies of terrestrial analogs A novel surface energy balance method for thermal inertia studies of terrestrial analogs
Surface thermal inertia derived from satellite imagery offers a valuable tool for remotely mapping the physical structure and water content of planetary regolith. Efforts to quantify thermal inertia using surface temperatures on Earth, however, have consistently yielded large uncertainties and suffered from a lack of reproducibility. Unlike dry or airless bodies, Earth's abundant water...
Authors
Ari Koeppel, Christopher S. Edwards, Lauren A. Edgar, Scott A Nowicki, Kristen A. Bennett, Amber L. Gullikson, Sylvain Piqueux, Helen A. Eifert, Daphne Chapline, A. Deanne Rogers
Geological context and significance of the clay-sulfate transition region in Mount Sharp, Gale crater, Mars: An integrated assessment based on orbiter and rover data Geological context and significance of the clay-sulfate transition region in Mount Sharp, Gale crater, Mars: An integrated assessment based on orbiter and rover data
On Mars, phyllosilicate (“clay”) minerals are often associated with older terrains, and sulfate minerals are associated with younger terrains, and this dichotomy is taken as evidence that Mars’ surface dried up over time. Therefore, in situ investigation of the Mount Sharp strata in Gale crater, which record a shift from dominantly clay-bearing to sulfate-bearing minerals, as seen in...
Authors
Melissa J. Meyer, Ralph E. Milliken, Kathryn M. Stack, Lauren A. Edgar, Elizabeth B. Rampe, Madison L. Turner, Kevin W. Lewis, Edwin S. Kite, Gwenael Caravaca, Ashwin R. Vasavada, William E. Dietrich, Alex B. Bryk, Olivier Gasnault, Stephane Le Mouelic, Christina H. Seeger, Rachel Y. Sheppard
Evolution of a lake margin recorded in the Sutton Island member of the Murray formation, Gale crater, Mars Evolution of a lake margin recorded in the Sutton Island member of the Murray formation, Gale crater, Mars
This study uses data from the Mars Science Laboratory Curiosity rover to document the facies of the Sutton Island member of the Murray formation, interpret paleoenvironments, and establish key stratigraphic transitions at Gale crater. Two facies associations were identified: Facies Association 1 (FA1) and Facies Association 2 (FA2). Individual facies in FA1 include planar-laminated...
Authors
Samantha Gwizd, Christopher M. Fedo, John P. Grotzinger, Steve G. Banham, Frances Rivera-Hernandez, Sanjeev Gupta, Kathryn M. Stack, Lauren A. Edgar, Ashwin R. Vasavada, Joel M. Davis, Linda C. Kah
Geology and stratigraphic correlation of the Murray and Carolyn Shoemaker formations across the Glen Torridon region, Gale crater, Mars Geology and stratigraphic correlation of the Murray and Carolyn Shoemaker formations across the Glen Torridon region, Gale crater, Mars
The Glen Torridon (GT) region within Gale crater, Mars, occurs in contact with the southern side of Vera Rubin ridge (VRR), a well-defined geomorphic feature that is comparatively resistant to erosion. Prior to detailed ground-based investigation of GT, its geologic relationship with VRR was unknown. Distinct lithologic subunits within the Jura member (Murray formation), which forms the...
Authors
Christopher M. Fedo, Alexander Bryk, Lauren A. Edgar, Kristen A. Bennett, Valerie K. Fox, William E. Dietrich, Steve G. Banham, Sanjeev Gupta, Kathryn M. Stack, Rebecca Williams, John P. Grotzinger, Nathan Stein, Dave Rubin, Gwenael Caravaca, Ray E. Arvidson, Madison N Hughes, Abigail A. Fraeman, Ashwin R. Vasavada, Juergen Schieber, Brad Sutter
Sedimentological and geochemical perspectives on a marginal lake environment recorded in the Hartmann’s Valley and Karasburg members of the Murray formation, Gale crater, Mars Sedimentological and geochemical perspectives on a marginal lake environment recorded in the Hartmann’s Valley and Karasburg members of the Murray formation, Gale crater, Mars
This study utilizes instruments from the Curiosity rover payload to develop an integrated paleoenvironmental and compositional reconstruction for the 65-m thick interval of stratigraphy comprising the Hartmann's Valley and Karasburg members of the Murray formation, Gale crater, Mars. The stratigraphy consists of cross-stratified sandstone (Facies 1), planar-laminated sandstone (Facies 2)...
Authors
Samantha Gwizd, Christopher M. Fedo, John P. Grotzinger, Steven G. Banham, Frances Rivera-Hernandez, Kathryn M. Stack, Kirsten L. Siebach, Michael T. Thorpe, Lucy Thompson, Catherine O’Connell-Cooper, Nathan Stein, Lauren A. Edgar, Sanjeev Gupta, David M. Rubin, Dawn Sumner, Ashwin R. Vasavada
Thermophysical and compositional properties of paleobedforms on Mars Thermophysical and compositional properties of paleobedforms on Mars
Bedforms on Earth and Mars are often preserved in the rock record in the form of sedimentary rock with distinct cross-bedding. On rare occasions, the full-surface geometry of a bedform can be preserved through burial and lithification. These features, known as paleobedforms, are found in a variety of geographic locations on Mars. Evidence in the morphology of paleobedforms, such as the...
Authors
Aaron R. Weintraub, Christopher S. Edwards, Matthew Chojnacki, Lauren A. Edgar, Lori K. Fenton, Sylvain Piqueux, Amber L. Gullikson