Geologic map of the Pomeii Quadrangle (MTM 20057), Maja Valles region of Mars
Table of Contents
IDENTIFICATION_INFORMATION
Citation:
Citation_Information:
Originator: Rene A. De Hon
Publication_Date: 1992
Title: Geologic map of the Pomeii Quadrangle (MTM 20057), Maja
Valles region of Mars
Edition:
Geospatial_Data_Presentation_Form: Map
Publication_Information:
Publication_Place: Reston, VA
Publisher: Department of the Interior - United States Geological Survey
Other_Citation_Details:
Miscellaneous Investigations Series Map
Published byt hte US Geological Survey, 1993
Online_Linkage:
Larger_Work_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Publication_Information:
Publication_Place:
Publisher:
Online_Linkage:
Description:
Abstract:
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. The Pompeii Quadrangle is in
northern Maja Valles region between Lunae Planum to the
west and Xanthe Terra to the east. Approximately two-thirds
of the surface is a relatively smooth plain, and the other
one-third is a subdued, cratered, upland plateau. Several
large (greater than 30 km in diameter) craters dominate the
landscape. The crater Pompeii is the largest fresh crater
in the quadrangle. The major interest in the map area is
evidence of the relatively brief, catastrophic Maja outflow
and its associated topographic modification of much of the
area. The effects of erosion and deposition by the Maja
flood are pronounced and are a chief part of the story;
therefore, flood-modified terrain is divided in
considerable detail. The stratigraphic units associated
with the outflow are true rock units although they may be
very thin.
Two major topographic provinces are present in the map
area. The Lunae Planum surface is a relatively smooth plain
that slopes gently downward to the east; it is interrupted
by dominantly north trending wrinkle ridges. Xanthe Terra
is a moderately rugged, cratered highland surgface that
stands higher than Lunae Planum. Xanthe Terra also has a
regional downward slope to the northeast toward Chryse
Planitia (U.S. Geological Survey). Hence, Xanthe forms a
broad revetment between the higher Lunae Planum surface and
the lower Chryse Planitia surface. On a regional scale, the
east edge of Lunae Planum is modigied by crater,
streamlined islands, an a broad scour zone of the upper
part of the Maja Valles system along the boundary with
Xanthe Terra. Xanthe is traversed from northwest to
southeast by four manor canyon systems-Bahram Vallis, Vedra
Valles, Maumee Valles, and Maja Valles. The Maja system is
mostly located immediately south of the quadrangle. Milton
(1974) mapped the geology of the Lunae Palus quadrangle at
1:2,000,000 scale using Mariner 9 images that revealed part
of the Maja Valles system. Milton's (1974) work called
attention the the problem of distinguishing age of surface
modification from age of emplacement, a problem that exists
on any planet with an active atmosphere. As Viking imagery
became available, parts of the quadrangle were included in
mapping of the western part of Chryse Planitia by Greeley
an others (1977), and most of the area was included in the
region discused by Theilig and Greeley (1979). Baker and
Kochel (1979) described the geomorphology of the Maja
outflow system and De Hon (1987) likened the extensive
trans-Xanthe canyon system to overbank flooding and
crevassing in a low-gradient river at flood stage. A
regioanl overview based on Viking imagery is provided in
the "Geologic Map of the Western Equatorial Region of Mars"
(Scott and Tanaka, 1986).
Purpose:
Mars Geology
Supplemental_Information:
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:
Ending_Date: April 15, 1991
Currentness_Reference:
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Continually
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -573549.2958
East_Bounding_Coordinate: -268325.7001
North_Bounding_Coordinate: 1344524.1560
South_Bounding_Coordinate: 1023837.3222
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Mars
Theme_Keyword: Maja Valles
Theme_Keyword: Chryse Planitia
Theme_Keyword: outflow channels
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Mars
Place_Keyword: Maja Valles
Place_Keyword: Chryse Planitia
Place_Keyword: outflow channels
Access_Constraints:
Use_Constraints:
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: United States Geological Survey
Contact_Person:
Contact_Position: Map Distribution
Contact_Address:
Address_Type: mailing and physical address
Address: Box 25286, Federal Center
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA
Contact_Voice_Telephone:
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address:
Hours_of_Service:
Native_Data_Set_Environment:
ArcView version 3.2 shapefile format
g:\users\shamlin\mars_sarah\maja_valles\i-2203_g.shp
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DATA_QUALITY_INFORMATION
Attribute_Accuracy:
Attribute_Accuracy_Report:
All attributes created during the creation process were
verified by displaying the lines in both the database and
the spatial coverage, but no formal tests were performed
Logical_Consistency_Report:
These data are believed to be logically consistent, though
no test were performed.
Completeness_Report:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Rene A. De Hon
Publication_Date:
Title:
Edition:
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place:
Publisher:
Other_Citation_Details:
Online_Linkage:
Larger_Work_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Publication_Information:
Publication_Place:
Publisher:
Online_Linkage:
Source_Scale_Denominator: 1
Type_of_Source_Media: mylar
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:
Ending_Date:
Source_Currentness_Reference:
Source_Citation_Abbreviation:
Source_Contribution:
Process_Step:
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.
Source_Used_Citation_Abbreviation:
Process_Date: 1998-1999
Source_Produced_Citation_Abbreviation:
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Organization: United States Geological Survey
Contact_Person: Trent Hare
Contact_Position: Computer Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 2255 n. Gemini
City: Flagstaff
State_or_Province: AZ
Postal_Code: 86001
Country: USA
Contact_Voice_Telephone: 520-556-7126
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: thare@usgs.gov
Hours_of_Service:
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SPATIAL_DATA_ORGANIZATION_INFORMATION
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 396
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SPATIAL_REFERENCE_INFORMATION
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Geographic
Geographic:
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Coordinate pair
Coordinate_Representation:
Abscissa_Resolution:
Ordinate_Resolution:
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: None
Ellipsoid_Name: Mars
Semi-major_Axis: 3393400.0
Denominator_of_Flattening_Ratio: 129.043
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ENTITY_AND_ATTRIBUTE_INFORMATION
Overview_Description:
Entity_and_Attribute_Overview:
Entity_and_Attribute_Detail_Citation:
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DISTRIBUTION_INFORMATION
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: United States Geological Survey
Contact_Person: Trent Hare
Contact_Position: Computer Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: 2255 n. Gemini
City: Flagstaff
State_or_Province: AZ
Postal_Code: 86001
Country: USA
Contact_Voice_Telephone: 520-556-7126
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: thare@usgs.gov
Hours_of_Service:
Resource_Description:
Distribution_Liability:
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METADATA_REFERENCE_INFORMATION
Metadata_Date: 04/05/01
Metadata_Review_Date:
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: United Staes Geological Survey
Contact_Person: Stephanie Dudash
Contact_Position: Physical Science Technician
Contact_Address:
Address_Type: Mailing and physical address
Address: 2255 N. Gemini
City: Flagstaff
State_or_Province: AZ
Postal_Code: 86001
Country: USA
Contact_Voice_Telephone: 50-556-7126
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address:
Hours_of_Service:
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998
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