Mars Viking Geologic Map I-2208 of Kasei Valles
This map is one in a series of 1:500,000-scale geologic maps initiated by the National Aeronautics and Space Administration to investigate areas of particular scientific interest on Mars. Kasei Valles make up one of the largest systems of outflow channels on Mars and were a major contributor of water to Chryse Planitia. The walls and floors of the Kasei channels are terraced and grooved, closely resembling the channeled scablands of eastern Washington State that were formed by catastrophic floods probably lasting no more than a few days (Baker and Milton, 1974; Baker and Kochel, 1979). Evidence obtained from previous geologic mapping of parts of Kasei Valles (Chapman and Scott, 1989) was not conclusive as to whether water levels varied markedly during a single flood and erosional event or whether flooding was episodic and marked by intermittent periods of scouring. This problem-whether one or several flood episodes occurred within individual water courses-has been a continuing issue in studies of Martian channel formation (Greeley and others, 1977). Large scale geologic mapping (Tanaka and Chapman, 1990) of Mangala Valles, another large outflow channel system in the Memnonia region of Mars, shows deposits of two periods of flooding; the deposits are separated stratigraphically by a lava flow. In areas around the Chryse basin, geologic studies indicate that more than one episode of channel formation occurred or, less likely, that flooding was episodic in Kasei Valles and probably occurred over protracted time intervals throughout the Hesperian period and possibly in the Early to Middle Amazonian. The map shows the geology of part of the south branch of Kasei Valles where this large outflow channel emptied into Chrysia Planitia. The geology is compiled on two 1:500,00-scale photomosaics made form Viking images with resolutions generally less than 50 m/pixel.
- Mimetype
- application/zip
- Filename
- Mars-Viking-Geologic-Map-I-2208-of-Kasei-Valles.zip
- Publisher
- USGS Astrogeology Science Center
- Publication Date
- 1 January 2023
- Author
- Scott, David H.
- Originator
- USGS Astrogeology Science Center
- Group
- MRCTR
- Added to Astropedia
- 18 September 2013
- Modified
- 16 June 2021
General
- Purpose
Mars geologic mapping
- Geospatial Data Presentation Form
- Geologic Map, Raster Data, Vector Data
- Series Id
- I-2208
- Edition
- 1
- Online Linkage
- http://astrogeology.usgs.gov/search
- Native Data Set Environment
- ESRI Arcinfo
- Color
- Color
Keywords
- System
- Mars
- Target
- Mars
- Theme
- Geology, Geographic Information System (GIS), Geomorphology, Water, Canyons
- Mission
- Viking
- Mission Specific
- Instrument
- VISA, VISB
- Search Terms
- Mars, Geology, Kasei Valles
Contact and Distribution
- Access Constraints
- None
- Access Instructions
- You will need GIS software to view included files.
- Use Constraints
- None
Data Status and Quality
- Currentness Reference
- Publication date
- Progress
- Complete
- Update Frequency
- None planned
- Logical Consistency Report
- These data are believed to be logically consistent, though no test were performed.
- Completeness Report
Maps were completed on Viking-era basemaps.
- Process Description
Map preparation was on mylar or acetate made from USGS negatives. All features were scanned at 50 microns and then vectorized and attributed in Arc/INFO.
- Entity and Attribute Linkage
- http://astrogeology.usgs.gov/rpif
Lineage
- Source Originator
- United States Geological Survey
- Source Title
- Geologic Map of the MTM 25057 and 25052 quadrangles, Kasei Valles region of Mars
- Source Online Linkage
- http://astrogeology.usgs.gov/search
- Type of Source Media
- Stable-Base Material
- Attribute Accuracy Report
- Best Effort
Geospatial Information
- Feature Name
- Kasei Valles
- Feature Target
- Kasei Valles
- Location Description
- Kasei Valles Region of Mars
- Minimum Latitude
- 22.3986
- Maximum Latitude
- 27.6018
- Minimum Longitude
- -60.1
- Maximum Longitude
- -49.8989
- Direct Spatial Reference Method
- Vector
- Object Type
- Polygon
- Quad Name
- Control Net
- Viking MDIM1.0
- Map Projection Name
- Simple Cylindrical
- Latitude Type
- Planetocentric
- Longitude Direction
- Positive East
- Longitude Domain
- -180 to 180