USGS Geoscience Data Catalog
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Troutman, Sandra M. , and Stanley, Richard G. , 2004, Maps showing sedimentary basins, surface thermal maturity, and indications of petroleum in the central Alaska province: Faults: U.S. Geological Survey Miscellaneous Field Studies Map MF-2428, U.S. Geological Survey, Menlo Park, California.Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
The map projection used is Albers Conical Equal Area.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.008192
Ordinates (y-coordinates) are specified to the nearest 0.008192
Planar coordinates are specified in meters
The horizontal datum used is North American Datum 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.978698.
| Value | Definition |
|---|---|
| anticline | Surface trace of the axis of an anticline. |
| anticlinorium | The surface trace of the axis of a very large anticline of regional extent |
| anticlinorium inferred | The surface trace of the axis of a very large anticline of regional extent whose location has not been directly observed. The existence of the fold is inferred from structural and stratigraphic relationships observed elsewhere. |
| fault | Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the boundary. |
| fault - inferred | Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset between the rock bodies on either side of the boundary. The fault has not been observed, but its existence is inferred from structural and stratigraphic relationships observed elsewhere. |
| fold | Surface trace of the axis of a fold of unspecified orientation. |
| gravity high | location of an observed Bouguer gravity high |
| gravity low | location of an observed Bouguer gravity low |
| normal | Surface location of a fault in which the hanging wall has moved downward relative to the footwall. |
| normal inferred | Surface location of a fault in which the hanging wall has moved downward relative to the footwall. The fault has not been observed, but its existence is inferred from structural and stratigraphic relationships observed elsewhere. |
| strike slip right | Location of a fault along which the slip motion is to the right, and parallel to the strike of the fault |
| strike slip right inferred | Location of a fault along which the slip motion is to the right, and parallel to the strike of the fault. The fault has not been observed, but its existence is inferred from structural and stratigraphic relationships observed elsewhere. |
| syncline | The surface trace of the axis of a syncline |
| synclinorium | The surface trace of the axis of a very large syncline of regional extent. |
| synclinorium inferred | The surface trace of the axis of a very large syncline of regional extent whose location has not been directly observed. The existence of the fold is inferred from structural and stratigraphic relationships observed elsewhere. |
| thrust | Location of fault in which the dip of the fault is less than 45 degrees over much if not all of its length and is characterized by horizontal compression. |
| thrust inferred | Location of fault in which the dip of the fault is less than 45 degrees over much if not all of its length and is characterized by horizontal compression. The fault has not been observed, but its existence is inferred from structural and stratigraphic relationships observed elsewhere. |
Sandra M. Troutman created this database
650-329-4918 (voice)
650-329-4975 (FAX)
rstanley@usgs.gov
This database depicts the distribution of major structures, faults, folds and gravity anomalies in the state of Alaska as shown on C. E. Kirschner's, Map showing sedimentary basins of onshore and continental shelf areas, Alaska (1988). This coverage includes linear features only, with polygon features included in an accompanying coverage. The regional (1:2,500, 000) scale of this coverage does not provide sufficient detail for site development purposes and this map does not take the place of fault-rupture hazard zone maps. Similarly, the database cannot be substituted for comprehensive maps that systematically identify and classify active fault movement. This coverage is intended for use as a base map for the accompanying open-file report "Map and digital database of sedimentary basins and indications of petroleum in the Central Alaska Province."
Kirschner, Charles E. , 1988, Map showing sedimentary basins of onshore and continental shelf areas, Alaska.: U.S. Geological Survey Miscellaneous Investigations Series Map I-1873.
Person who carried out this activity:
650-329-4974 (voice)
650-329-4975 (FAX)
stroutman@usgs.gov
This dataset is intended to describe completely the major linear structures located on the source map as cited.
All features in the dataset were digitized from the same georeferenced, paper map. Therefore, spatial errors within the dataset associated with geoferencing are internally consistent.
Are there legal restrictions on access or use of the data?
- Access_Constraints: none
- Use_Constraints:
- Uses of this digital coverage should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited for a scale of 1:2,500,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:2,500,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database
1-888-ASK-USGS (voice)
303-202-4693 (FAX)
ask@usgs.gov
USGS Miscellaneous Field Studies Map MF-2428
The U.S. Geological Survey (USGS) provides these geographic data "as is." The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied, as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS. This digital database of historic indication of petroleum in the central Alaska province is 1:2,500,000 map-scale and any derivative maps thereof, is not meant to be used or displayed at any scale larger than 1:2,500,000.
| Data format: | Fault traces and structural features in format ArcInfo export (version 8.x) Size: 0.5 megabytes |
|---|---|
| Network links: |
<http://pubs.usgs.gov/mf/2003/2428/digital_files/faults.e00> |
703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://geo-nsdi.er.usgs.gov/metadata/map-mf/2428/faults.faq.html
Page Contact Information: Peter Schweitzer
Page Last Modified: Tuesday, 03-Nov-2009 15:22:33 EST
