border: A polygon that encompasses the maximum geographic extent of the data observations MapUnitPolys: Polygons that record the distribution of mapped or interpreted geologic units OtherPolys: Polygons that record the location and extent of geologic or geographic features other than the geologic units.
Stevens, D.S.P., 2014, Engineering-geologic map of the Dalton Highway from Galbraith Lake to Slope Mountain, southern Arctic Foothills, Alaska: Preliminary Interpretive Report PIR 2002-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
This is a vector data set.
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.000001
Ordinates (y-coordinates) are specified to the nearest 0.000001
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 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 1/294.9786982.
Value | Definition |
---|---|
(GD) | Poorly to moderately graded gravel with silt, sand, and clay covered by silt-rich overburden of variable thickness - Estimated 20-60 percent coarse, granular deposits with considerable oversized material. Extremely variable in composition and areal extent of individual component deposits. Engineering applications vary widely due to large range of grain size and sorting properties. Older deposits may contain highly weathered clasts and thus may not be suitable as construction materials. Includes primarily GP, GP-GM, GP-GC, GM, and GC of the ASTM standards soil classification (American Society for Testing and Materials, 1988). Overburden includes primarily ML, OL/OH, and SM. |
GD | Poorly to moderately graded gravel with silt, sand, and clay - Estimated 20-60 percent coarse, granular deposits with considerable oversized material. Extremely variable in composition and areal extent of individual component deposits. Engineering applications vary widely due to large range of grain size and sorting properties. Older deposits may contain highly weathered clasts and thus may not be suitable as construction materials. Includes primarily GP, GP-GM, GP-GC, GM, and GC of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
MS | Sandy silt with gravel, organic silt, and silty sand with gravel - Chiefly fine materials. Estimated greater than 70 percent silt. May be organic rich. Commonly frozen and ice-rich, especially on north-facing slopes. Includes primarily ML, OL/OH, and SM of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
BU | Undifferentiated mixed rocks - Rocks of mixed lithology and/or very fine-grained sedimentary lithologies that are generally poorly suited for use as construction materials. Includes non-quartzose sandstone, shale, mudstone, siltstone, limestone, and coal. |
GV | Mixed coarse and fine materials - Mixed deposits of rubble, gravel, sand, silt, clay, and organic material in variable proportions and areal extent. Engineering applications vary widely due to large range of grain size and sorting properties. Permafrost may be present, especially in older deposits. Includes primarily GP, GP-GM, GP-GC, GM, GC, SM, ML and OL/OH of the ASTM standards soil classification (American Society for Testing and Materials, 1988). Locally includes GW, GW-GM, SW, and SW-SM. |
GR | Poorly graded rock debris and rubble, with minor variable amounts of interstitial sand, silt, and clay -Estimated 90 percent coarse, angular deposits with considerable oversized material. Engineering applications vary widely due to large range of grain size and sorting properties. Includes primarily GP of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
GA | Well to locally poorly graded gravel with sand and silt - Chiefly (estimated greater than 80 percent) clean sand and gravel with some (estimated 10-30 percent) silt. Grain size and degree of stratification are variable. Permafrost may be present, especially in older deposits. Older deposits may contain highly weathered clasts and thus may not be suitable as construction materials. Rare oversized materials may include boulders. Includes primarily GW and GW-GM of the ASTM standards soil classification (American Society for Testing and Materials, 1988), with possible subordinate proportions of GP and GP-GM. |
(GO) | Well graded, weathered gravel with sand and silt - Chiefly (estimated greater than 80 percent) clean sand and gravel, overlain by 0.3-2.5m organic-rich silt. Grain size and degree of stratification are variable. Ice rich permafrost may be present, especially in overburden. Rare oversized materials may include boulders. Includes primarily GW and GW-GM of the ASTM standards soil classification (American Society for Testing and Materials, 1988). Overburden includes primarily ML, OL/OH, and SM. |
MO | Well graded organic rich silt and sand - Estimated greater than 80 percent organic silt and peat. Commonly frozen and ice-rich due to the excellent insulating properties of peat, especially on north-facing slopes. Includes primarily ML and OL/OH of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
ML | Silt with minor sand and small pebbles - Estimated greater than 90 percent silt. May be locally organic rich. Commonly frozen and ice rich, especially on north-facing slopes. Includes primarily ML of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
GL | Very poorly graded silty and clayey gravel with organic debris -Estimated 20-80 percent coarse, granular deposits with considerable oversized material. Engineering applications limited, and vary widely due to large range of grain size and sorting properties. Includes primarily GP-GM, GP-GC and GP of the ASTM standards soil classification (American Society for Testing and Materials, 1988), with subordinate proportions of OL/OH, SM, and ML. |
GI | Well to moderately graded gravel with sand and silt - Chiefly (estimated greater than 80 percent) clean sand and gravel, with some (estimated 10-30 percent) silt. Grain size and degree of stratification are variable. Ice rich permafrost may be present, especially in older deposits. Older deposits may contain highly weathered clasts and thus may not be suitable as construction materials. Rare oversized materials may include boulders. May locally include some poorly graded gravel with higher silt and/or clay content. Includes primarily GW, GW-GM and GM of the ASTM standards soil classification (American Society for Testing and Materials, 1988). Locally includes GP-GM. |
BQ | Medium-jointed, fine- to coarse-grained quartzose sedimentary rocks - Chiefly chert-rich conglomerate and sandstone. |
MC | Well graded silt, silt with sand, sandy silt, and clay - Estimated greater than 80 percent silt and sand, with some (estimated 10-30 percent) clay. Commonly frozen and ice-rich, especially on north-facing slopes. Includes primarily ML of the ASTM standards soil classification (American Society for Testing and Materials, 1988), with subordinate proportions of CL, CH, or MH. |
SW | Well graded fine- to coarse-grained sand - Estimated greater than 90 percent sand. Includes primarily SW of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
SA | Well to moderately graded sand, with silt and gravel - Chiefly fine materials. Estimated greater than 80 percent sand. May be locally organic rich. Ice-rich permafrost may be present, especially in older deposits. Includes primarily SW, SW-SM, and SM of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
GW | Well graded gravel, with sand - Chiefly (estimated greater than 90 percent) clean gravel and sand. Grain size and degree of stratification are variable. Ice-rich permafrost may be present, especially in overburden and older deposits. Rare oversized materials may include boulders. Includes primarily GW of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
GF | Moderately to poorly graded gravel with sand and silt - Estimated 30-80 percent coarse, granular deposits with considerable oversized material. Engineering applications vary somewhat due to range of grain size and sorting properties. Ice rich permafrost may be present, especially in older deposits. Includes primarily GW-GM, GP-GM, and GM of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
GT | Poorly to moderately graded gravel with silt and sand - Estimated 20-80 percent coarse, granular deposits with local oversized material that may include boulders. Engineering applications vary widely due to large range of grain size and sorting properties. Ice rich permafrost may be present, especially in older deposits. Includes primarily GP-GM and GP of the ASTM standards soil classification (American Society for Testing and Materials, 1988). |
BC | Medium-jointed to massive, fine- to coarse-grained sedimentary carbonate rocks - Chiefly limestone. May include chert nodules and zones of platy bedding. |
BM2 | Mixed medium-jointed to massive, medium-grained sedimentary carbonate rocks and very fine-grained, platy sedimentary rocks - Chiefly limestone overlain by shale. |
(GA) | Well to locally poorly graded gravel with sand and silt covered by covered by 0.5-1.0m silt-rich overburden - Chiefly (estimated greater than 80 percent) clean sand and gravel with some (estimated 10-30 percent) silt. Grain size and degree of stratification are variable. Permafrost may be present, especially in older deposits. Older deposits may contain highly weathered clasts and thus may not be suitable as construction materials. Rare oversized materials may include boulders. Includes primarily GW and GW-GM of the ASTM standards soil classification (American Society for Testing and Materials, 1988), with possible subordinate proportions of GP and GP-GM. Overburden includes primarily ML, OL/OH, and SM. |
BM1 | Mixed medium-jointed, fine- to coarse-grained, quartzose sedimentary rocks and very fine-grained, platy sedimentary rocks - Chiefly conglomerate, sandstone, and shale. |
Value | Definition |
---|---|
certain | Indicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale. |
Formal codeset | |
---|---|
Codeset Name: | MapUnit |
Codeset Source: | MapUnit field of this dataset |
Value | Definition |
---|---|
0A20 | CMYK value - C:0%, M:8%, Y:20%, K:0% |
30X0 | CMYK value - C:30%, M:0%, Y:100%, K:0% |
2230 | CMYK value - C:20%, M:20%, Y:30%, K:0% |
A540 | CMYK value - C:8%, M:50%, Y:40%, K:0% |
0A40 | CMYK value - C:0%, M:8%, Y:40%, K:0% |
0030 | CMYK value - C:0%, M:0%, Y:30%, K:0% |
0A50 | CMYK value - C:0%, M:8%, Y:50%, K:0% |
4060 | CMYK value - C:40%, M:0%, Y:60%, K:0% |
4020 | CMYK value - C:40%, M:0%, Y:20%, K:0% |
1240 | CMYK value - C:13%, M:20%, Y:40%, K:0% |
0250 | CMYK value - C:0%, M:20%, Y:50%, K:0% |
1110 | CMYK value - C:13%, M:13%, Y:13%, K:0% |
1060 | CMYK value - C:13%, M:0%, Y:60%, K:0% |
1370 | CMYK value - C:13%, M:30%, Y:70%, K:0% |
A360 | CMYK value - C:8%, M:30%, Y:60%, K:0% |
0160 | CMYK value - C:0%, M:13%, Y:60%, K:0% |
0330 | CMYK value - C:0%, M:30%, Y:30%, K:0% |
A5X0 | CMYK value - C:8%, M:50%, Y:100%, K:0% |
21A0 | CMYK value - C:20%, M:13%, Y:8%, K:0% |
3220 | CMYK value - C:30%, M:20%, Y:20%, K:0% |
3330 | CMYK value - C:30%, M:30%, Y:30%, K:0% |
The specified polygon may be a: borrow pit, geologic unit pattern, graded area, naled, rock quarry, or a rock quarry/dump.
Value | Definition |
---|---|
certain | Indicates that the author has sufficient observational and/or other supporting data to be reasonably confident in the scientific credibility of the interpretation of the feature. The level of certainty is specific to the map scale. |
Value | Definition |
---|---|
NULL | Blank (NULL) field values indicate that a "Symbol" value is not applicable |
Formal codeset | |
---|---|
Codeset Name: | FGDC Digital Cartographic Standard for Geologic Map Symbolization |
Codeset Source: | Federal Geographic Data Committee [prepared for the Federal Geographic Data Committee by the U.S. Geological Survey], 2006, FGDC Digital Cartographic Standard for Geologic Map Symbolization: Reston, Va., Federal Geographic Data Committee Document Number FGDC-STD-013-2006, 290 p., 2 plates. |
Value | Definition |
---|---|
NULL | Blank (NULL) field values indicate that a "Label" value is not applicable |
Formal codeset | |
---|---|
Codeset Name: | FGDC Digital Cartographic Standard for Geologic Map Symbolization |
Codeset Source: | See MapUnit field of this dataset. |
Value | Definition |
---|---|
NULL | Blank (NULL) field values indicate that a "Notes" value is not applicable |
The specified polygon may be a: borrow pit, geologic unit pattern, graded area, naled, rock quarry, or a rock quarry/dump.
Research supported by the U.S. Geological Survey, National Cooperative Geologic Mapping Program under assistance award number 01HQAG0054. The views contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government. Cartography by: P.E. Gallagher (2013); Editorial review by: P.K. Davis (2013); Peer review by: J.R. Schaefer (2002) and S.S. Masterman (2013)
(907)451-5020 (voice)
dggsgis@alaska.gov
This derivative engineering geologic map illustrates potential near-surface sources of various geologic materials that may be useful for construction near the Dalton Highway area, from Atigun Gorge to Slope Mountain. Map unit descriptions also include discussion of the potential geologic hazards that can be inferred from the typical physical properties of each map unit, such as sediment texture and ground-ice content and typical topographic settings. This map is generalized and is not intended to show exact locations of specific materials. Local variations are common, especially near unit boundaries. The map was derived electronically from a related surficial geologic map of the area using Geographic Information System (GIS) software. Geologic units were locally verified by ground observations during field visits. The results should be considered reconnaissance in nature.
Harris, E.E., Mull, C.G., Reifenstuhl, R.R., and Montayne, Simone, 2002, Geologic map of the Dalton Highway (Atigun Gorge to Slope Mountain) area, southern Arctic Foothills, Alaska: Preliminary Interpretive Report PIR 2002-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
Hamilton, T.D., 2003, Surficial geology of the Dalton Highway (Itkillik-Sagavanirktok rivers) area, southern Arctic foothills, Alaska: Professional Report PR 121, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.Online Links:
American Society for Testing and Materials, 1998, Annual book of ASTM Standards: null v. 04.08, American Society for Testing and Materials, Philadelphia.
Data sources used in this process:
Engineering-geologic map units were derived from the surficial-geologic map. Physical properties of engineering-geologic map units are interpretive, based on extrapolation from verified localities and from previously published reports and data. Certainty in identification of the map units varies due to the scale and interpretive nature of the mapping. The geologic unit interpretations and boundaries presented in this report result from interpretation of aerial photographs as well as investigative traverses throughout the map area, aerial reconnaissance via helicopter, and examination of road-cuts and river exposures. Potential geologic hazards are inferred from the typical physical properties of map units, including sediment texture and ground-ice content, and their typical topographic settings. Except for a few test pits, no subsurface investigations or laboratory analyses were used for this publication. The reader is cautioned that this map is intended only as a general guide, and that unevaluated geologic resources and hazards may be present. Detailed geotechnical investigations should be conducted prior to utilization of any map units for engineering purposes. This map has received two technical reviews by geologists familiar with the subject matter. We incorporated the reviewers' suggestions into the final draft.
All boundaries are inferred or approximately located. Surficial-geologic units were initially identified by interpretation of ~1:65,000-scale false-color infrared aerial photographs (1979 and 1982) and locally verified by field checking (2001). We believe the total horizontal accuracy of the mapped surficial-geologic contacts is on the order of 25 m or better, with somewhat lesser accuracy expected in areas of rugged relief.
This dataset includes shapefiles that contain information about the mapped and interpreted engineering-geologic deposits in the map area distinguishable at a scale of 1:63,360. No analytical tests were conducted for this report. The table describes engineering properties that are generally present in the mapped surficial deposits, but local variations and exceptions are most certainly to be expected. The reader is therefore cautioned that this map is intended only as a general guide, and that unevaluated geologic resources and hazards may be present. Detailed geotechnical investigations should be conducted prior to utilization of any map units for engineering purposes.
Polygon topology was present and clean on the original ArcGIS geodatabase. All polygon features were topologically validated using ArcGIS prior to export to shapefile format.
Are there legal restrictions on access or use of the data?
- Access_Constraints:
- This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
- Use_Constraints:
- Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
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PIR 2002-3
The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.
Data format: | Shapefiles |
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Network links: |
<http://dx.doi.org/10.14509/25486> |
(907)451-5020 (voice)