USGS Geoscience Data Catalog
Additional USGS Geoscience data can be found by geographic location or by publication series.
This is a Vector data set.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 20
Ordinates (y-coordinates) are specified to the nearest 20
Planar coordinates are specified in meters
1 Qp Peat deposits (Holocene) 2 Qg Basal drift of Elemendorf advance (Pleistocene) 3 Qac Abandoned river channel deposits (Holocene or Pleistocene) 4 Qc Undifferentiated colluvium (Holocene) 5 Qgb Thin drift of Elmendorf advance (Pleistocene) 6 Qad Ancient drainage deposits of Elmendorf advance (Pleistocene) 7 Qat Alluvium in river terraces (Holocene or Pleistocene) 8 Qaa Alluvium along rivers (Holocene) 9 Qml Lateral moraine of Elmendorf advance (Pleistocene) 10 Qas Undifferentiated colluvium and alluvium (Holocene) 11 Qk Kame terrace deposits of Elmendorf advance (Pleistocene) 12 Qg2 Drift of pre-Elmendorf advances (Pleistocene) 13 Qat2 Alluvium in paleodrainage (Holocene or Pleistocene) 15 Qam Alluvium along small meandering streams (Holocene) 16 Qls Landslide deposits (Holocene) 17 Qe Esker deposits of Elmendorf advance (Pleistocene) 99 w waterThe arc attribute tables for the coverages east and west have a numeric item named 'code', which has the following descriptions:
0 leader 1 contact 2 contact 3 contact, approximately located 9 water boundaryThe arc attribute tables for coverages fault_e and fault_2 have a numeric item named 'code', which has the following descriptions:
1 fault 2 fault, possible location 3 fault, approximate location 4 fault, concealed 5 fault, probable location 6 limit of aerial photograph coverage 7 lineation, probably reflecting bedding in underlying bedrock
Peter Haeussler, Nathan Pannkuk (Raytheon STX contractor), H. Wilmer (ECO contractor); U.S. Geological Survey, 4200 University Drive, Anchorage, AK 99508-4667
This map was designed to delineate the location of the Castle Mountain fault and other active or potentially active faults in the area. Nonetheless, the surficial geologic map may be used for generic purposes.
Person who carried out this activity:
The linework was digitized from a paper copy of 1:25,000
scale field maps. The linework was derived from field
work and aerial photograpic interpretation. The aerial
photographs were taken on March 29, 1986 and working
copies were printed at a scale of 1" to 1500 feet or
1:18,000. Aerial photo interpretations were drawn on
mylar overlays and then transferered to 1:25,000
Geologic contacts are generally accurate to within 30 meters, and most fault locations are accurate to 10 meters, except the Lost-in-the-woods fault, which is located to approximately 100 meters, where dashed and dotted.
The topographic base is a raster layer and obtained by scanning the culture separation of the 1:25,000 topographic base at 300 dpi.
Users of this digital geologic map should respect the intentions of the originators and the limitations of the map. This coverage is intended to be used at a scale of 1:25,000; it is not intended to be used as a more detailed scale. The geologic contacts are generally accurate to within 30 meters, and most fault locations are accurate to 10 meters except the Lost-in-the woods fault, which is located to approximately 100 meters.
The data sets contain information appropriate for a 1:25,000 scale surficial geologic map.
The map area is covered by two sets of coverages, 'east' and 'west'. Each area has a net coverage containing information about the geologic units ('unit') and their boundaries ("code"). For each area there is an additional coverage containing fault information. Dangling arcs are present.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data.
This digital publication was prepared by an agency of the United States Government. Neither the United States Government nor the agency thereof nor any of their employees make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Although this data has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials.
|Data format:||Geologic units (east and west) and faults (e and w) in format ARCE (version 7.x) Size: 2|