Laszlo P. Keszthelyi 2021 vector digital data Scientific Investigations Series (SIM) 3477 2021 Keszthelyi, L.P., Huff, A.E., and Jaeger, W.L., 2021, Geologic map of the Athabasca Valles region, Mars: U.S. Geological Survey Scientific Investigations Map 3477, pamphlet 11 p., scale 1:1,000,000, https://doi.org/10.3133/sim 3477. This 1:1,000,000 scale geologic map of the Athabasca Valles region of Mars places the best-preserved lavas on Mars into their geologic context. The map shows vigorous geologic activity in the most recent epoch of Mars’ geologic history, which is extremely unusual for the planet. In these atypically youthful terrains, the interpretations of geologic processes are exceptionally robust for planetary geologic mapping. The investigation relies heavily on images from the NASA Mars Reconnaissance Orbiter (MRO) High-Resolution Imaging Science Experiment (HiRISE) and Context (CTX) cameras which have sub-meter and sub-decameter spatial resolution, respectively. Geospatial fidelity is provided by the photogrammetrically controlled 100 meter per pixel map base derived from Thermal Emission Imaging System (THEMIS) daytime infrared image data. The geodatabase, THEMIS base map, and all map components are included online as supplemental data. The individual HiRISE and CTX images are available through the NASA Planetary Data System’s Cartography and Imaging Sciences Node (https://pds-imaging.jpl.nasa.gov/). 1:1,000,000-scale map of the Athabasca Valles Region, Mars. 2021 publication date Complete None Planned 150.0 160.0 12.5 2.5 None Mars Athabasca Valles Geology Planetary Science THEMIS None None Laszlo P. Keszthelyi, Alexandra E. Huff, Windy L. Jaeger Version 6.2 (Build 9200) ; Esri ArcGIS 10.7.1.11595 Vector String 571 String 710 String 663 GT-polygon composed of chains 377 Entity point 1 GT-polygon composed of chains 4 GT-polygon composed of chains 11 GT-polygon composed of chains 208 GT-polygon composed of chains 23 GT-polygon composed of chains 5 String 4 GT-polygon composed of chains 1 String 278 Athabasca MTM clon155E 1.0 155.0 0.0 0.0 0.0 coordinate pair 0.0001 0.0001 meter D Mars 2000 Mars 2000 IAU IAG 3396190.0 1.0E-10 20200128 USGS Astrogeology Science Center Marc Hunter IT Specialist (Applications Software) mailing and physical

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