This Readme.txt file was generated on 20220131 by Madison N. Hughes ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset: Geomorphic map of Glen Torridon in Gale crater, Mars 2. Author Information Principal Investigator Contact Information Name: Madison N. Hughes Institution: Dept. of Earth and Planetary Sciences, Washington University in St. Louis Address: 1 Brookings Drive, St. Louis, MO 63130 Email: mnhughes@wustl.edu 3. Date of data collection: The map was crated based off of the Mars MSL Gale Merged Orthophoto Mosaic 25cm v3 (Calef III, F. J., & Parker, T. (2016). MSL Gale Merged Orthophoto Mosaic. PDS Annex, U.S. Geological Survey. http://bit.ly/MSL_Basemap), which was processed on 20110101. The geomorphic map was completed in July 2021. 4. Geographic location of data collection: The map was created at Washington University in St. Louis. 5. Information about funding sources that supported the collection of the data: Madison N. Hughes created this map while supported by the National Science Foundation Graduate Research Fellowship Program through Grant DGE-1745038. 6. Contextual description of the data: Glen Torridon is located in Gale crater, Mars, and was explored by the Curiosity rover from early 201902 until 202104. This geomorphic map was created to better understand the distribution of surface features and characteristics in Glen Torridon, and how they relate to the underlying geology. A more areally extensive version of this map is presented and discussed in detail in Hughes (2021) (Hughes M. N. (2021). Landscape evolution at Endeavour and Gale craters on Mars, and how terrain characteristics correlate with mineralogy on lower Mount Sharp, Gale crater (Doctoral Dissertation). St. Louis, MO: Washington University in St. Louis. DOI: 10.7936/c6se-5895). This version of the geomorphic map is cropped to only include the area that was explored by the Curiosity rover within Glen Torridon. -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: This data set is licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. 2. Links to publications that cite or use the data: Hughes M. N. (2021). Landscape evolution at Endeavour and Gale craters on Mars, and how terrain characteristics correlate with mineralogy on lower Mount Sharp, Gale crater (Doctoral Dissertation). St. Louis, MO: Washington University in St. Louis. DOI: 10.7936/c6se-5895. 3. Links to other publicly accessible locations of the data: n/a 4. Links/relationships to ancillary data sets: Basemap for geomorphic map: http://bit.ly/MSL_Basemap 5. Was data derived from another source? Created using the Mars MSL Gale Merged Orthophoto Mosaic 25cm v3 (Calef III, F. J., & Parker, T. (2016). MSL Gale Merged Orthophoto Mosaic. PDS Annex, U.S. Geological Survey. http://bit.ly/MSL_Basemap) 6. Recommended citation for the data: Hughes, M. N., (2021). Geomorphic map of Glen Torridon in Gale crater, Mars. [Data set] Washington University Open Scholarship. DOI: ????? --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: Geomorphic_map_GT.shp Short description: Polygonal shape file of the Glen Torrdion geomorphic map. Map Projected. B. Filename: Geomorphic_map_GT.shx Short description: The index file associated with Geomorphic_map_GT.shp. C. Filename: Geomorphic_map_GT.dbf Short description: The dBASE table associated with Geomorphic_map_GT.shp. 3. Additional related data collected that was not included in the current data package: n/a 4. Are there multiple versions of the dataset? no ------------------------------------------ GEOMORPHIC MAP UNIT NAMES AND DESCRIPTIONS ------------------------------------------ Name: Ridged Unit_a (RU_a) Description: RU_a is defined by its lack of identifiable bedrock and the presence of periodic linear ridges. These ridges are less than a meter in amplitude. Name: Ridged Unit_b (RU_b) Description: RU_b looks very similar to the RU_a, with the only difference being the presence of some fractured bedrock, visible from orbit. This unit also has the repeating linear ridges that are visible in the RU_a, although they appear to be less well-defined in the RU_b. Name: Ridged Unit_c (RU_c) Description: RU_c has similar linear repeating ridges as the RU_a and RU_b. However, the ridges themselves have a sharper appearance and larger amplitude of ~2 meters. This unit lacks visible coherent bedrock from orbit. However, on top of some of the ridges, there appears to be smooth bedrock outcrops in some locations. This unit has a gradational contact with RU_a. Name: Polygonal Unit_a (PU_a) Description: PU_a consists of polygonally fractured bedrock, with the fractures being relatively dense compared to PU_b and PU_c. In some areas it appears to have gradational lateral boundaries with the RU_b. It also tends to be surrounded by the RU_a or RU_c. Name: Polygonal Unit_b (PU_b) Description: PU_b consists of polygonally fractured bedrock that is less densely fractured compared to the PU_a. It also has a higher albedo. Name: Polygonal Unit_b (PU_c) Description: PU_c has a similarly high albedo as the PU_b, but more boulders that appear to be out of place can be identified from orbit. It also appears to have more sand cover. The PFU_c is mostly located in a continuous area east of the Greenheugh pediment. Name: Sandy Pits and Ripple Fields Description: This unit is mapped in areas where there is substantial sand cover, which can be identified by its low albedo and surface morphologies such as the presence of dunes or ripples. -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: We used the HiRISE-based data (Calef & Parker, 2016) to generate a detailed geomorphic map at 0.25 m/pixel of terrains exposed in Glen Torridon. The geomorphic units were defined based on textures and albedos as observed in the HiRISE mosaic. Detailed methods are described in Hughes (2021). Reference Hughes M. N. (2021). Landscape evolution at Endeavour and Gale craters on Mars, and how terrain characteristics correlate with mineralogy on lower Mount Sharp, Gale crater (Doctoral Dissertation). St. Louis, MO: Washington University in St. Louis. DOI: 10.7936/c6se-5895. 2. Methods for processing the data: n/a 3. Instrument- or software-specific information needed to interpret the data: Any software for analyzing geospatial imagery, such as ArcMap or ENVI. 4. Standards and calibration information, if appropriate: n/a 5. Environmental/experimental conditions: n/a 6. Describe any quality-assurance procedures performed on the data: Draft versions of the geomorphic map were reviewed by the MSL Curiosity Science team members, and edits to the map were made based on their input and feedback. This led to the final product, which was informally approved by the science team. 7. People involved with sample collection, processing, analysis and/or submission: Madison N. Hughes generated the geomorphic map and is responsible for submission.