Identification_Information: Citation: Citation_Information: Originator: Larry C. Munn and Christopher S. Arneson Publication_Date: 1998 Title: 1:500,000-Scale Digital Soils Map of Wyoming Publication_Information: Publication_Place: Laramie, Wyoming Publisher: University of Wyoming Agricultural Experiment Station Online_Linkage: Description: Abstract: This dataset represents soils of Wyoming at 1:500,000- scale. The layer contains 45 separate soils descriptions across 10 Wyoming soil zones. The layer was compiled based on the five-factor soil forming model using digital surficial geology, bedrock geology, and elevation. This dataset is documented in the report: Munn, L.C. and C.S. Arneson, 1998. Soils of Wyoming: A Digital Statewide Map at 1:500,000-Scale. Agricultural Experiment Station Report B-1069. University of Wyoming, College of Agriculture, Laramie, Wyoming. Purpose: This layer was originally created specifically for use in the Wyoming Ground-Water Vulnerability Mapping Project being conducted at the Wyoming Water Resources Center, a statewide study of aquifer vulnerability to contamination from pesticides. In that context, it was to be used to assist in the generation of a rating map of how soils affect aquifer sensitivity to surface contaminants. The Soils of Wyoming Map can be used, however, for many other purposes. It is intended to supplement other existing 1:500,000 scale digital natural resource layers of the state. Please see Use-Constraints for more details. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Currentness_Reference: publication date Status: Progress: complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -111.26477012 East_Bounding_Coordinate: -103.83670034 North_Bounding_Coordinate: 44.99903411 South_Bounding_Coordinate: 40.94837176 Keywords: Theme: Theme_Keyword: soils Theme_Keyword: surficial geology Theme_Keyword: groundwater vulnerability Theme_Keyword: aquifer sensitivity Theme_Keyword_Thesaurus: None Place: Place_Keyword: Wyoming Place_Keyword_Thesaurus: None Access_Constraints: none Use_Constraints: The data should not be used without first reading the full data documentation in UW AES Report B-1069. This data should not be used for analysis at a scale larger than 1:500,000. This dataset may not be redistributed or repackaged in any form without the express written consent of the University of Wyoming Spatial Data and Visualization Center and the Department of Renewable Resources. This map provides a generalized description of soils within the state of Wyoming. Soils are highly variable, both on a regional basis (plains, mountains, basins) and locally with changes in topography (north versus south slopes, side slopes versus ridge crest or foot slope positions), vegetation, climate, and geology. This map should be used for broad scale planning and general assessment of large areas of land. It should not be used for site specific interpretations such as site selection for an underground fuel storage tank or the development of management plans for individual farm fields. Such site intensive land uses require much more detailed soils information than is provided by this map. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Chris Arneson Contact_Organization: Spatial Data and Visualization Center Contact_Address: Address_Type: mailing address Address: Box 3355 University Station City: Laramie State_or_Province: Wyoming Country: USA Postal_Code: 82071 Contact_Voice_Telephone: 307-766-2735 Contact_Electronic_Mail_Address: n/a Hours_of_Service: 8 AM to 5 PM MST Native_Data_Set_Environment: This dataset is a polygon layer created using ARC/INFO version 6.2 on a SUN Microsystems UNIX computer. The layer is ARC/INFO export file format and ARC/INFO shapefile format. Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: soils Browse_Graphic_File_Type: gif Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: see Process Steps Completeness_Report: All polygons are fully attributed. Logical_Consistency_Report: All polygons are closed and each polygon has one unique label. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: see Process Steps Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Wyoming State Geological Survey Publication_Date: 1998 Title: Wyoming Digital Surficial Geology; Type_of_Source_Media: digital Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: publication date Source_Scale_Denominator: 500000 Source_Citation_Abbreviation: surficial geology Source_Contribution: modeling layer Source_Information: Source_Citation: Citation_Information: Originator: US Geological Survey, Denver Center Publication_Date: 1994 Title: Digital Bedrock Geology for Wyoming; Type_of_Source_Media: digital Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1994 Source_Currentness_Reference: publication date Source_Scale_Denominator: 5000000 Source_Citation_Abbreviation: bedrock geology Source_Contribution: modeling layer Source_Information: Source_Citation: Citation_Information: Originator: USGS Publication_Date: unknown Title: 3-arc-second (90m) Digital Elevation Model for Wyoming; Type_of_Source_Media: film Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1961 Ending_Date: 1981 Source_Currentness_Reference: ground condition Source_Scale_Denominator: 250000 Source_Citation_Abbreviation: dem Source_Contribution: modeling layer Process_Step: Process_Description: The Soils Map of Wyoming and the generalized soils maps of the counties in Wyoming are derived maps based on the five soil forming factors model first proposed in its entirety by the Russian soil scientist Doukachev, in the 1880's. This model was introduced broadly to American soil scientists by Hans Jenny (Jenny 1941). The five factors of soil formation are soil parent material, climate, biota, topography, and time. As Hudson (1992) pointed out, soil surveying is an activity that conforms well to the theories of paradigm-based science. During detailed soil surveys, field mapping is based on the projection of soil map unit concepts onto the landscape, after which map unit composition and boundary placement are subject to immediate field checking in the form of soil pit excavation(s). Generalized soils maps are often based on either a process of consolidation of detailed soils maps, or on projection of limited data from direct observation across a broad area through use of soil-landscape models. In the United States, the model used to describe soil-landscape relationships is most commonly the soil forming factor model. The maps prepared for this project were prepared using current understanding of soil-landscape models and available data in the form of published soil surveys, maps, and reports of the Natural Resource Conservation Service, the Forest Service, the Bureau of Land Management, and numerous theses and scientific papers published by the Wyoming Agricultural Experiment Station and the University of Wyoming. The soil map presented here differs from the STATSGO map developed by the Natural Resource Conservation Service (National Cartographic and GIS Center, 1998) in several ways. The STATSGO maps were developed by generalizing existing detailed soil surveys and were prepared on a 1:250,000-scale topographic map base. The mapping units in the STATSGO map contain from one to 21 components, and the soils components are represented at the series level. The STATSGO map provides a somewhat more detailed description of the soils in the state, with consequent complexity in interpretations. The detailed maps from which the STATSGO map was generalized were produced by numerous scientists over a thirty year time span. The surficial geology map of the state and the state bedrock geology map were not available in electronic form when these maps were produced and the original mapping was done on aerial photographs. The scale of 1:500,000 used for this map was specified by the larger Wyoming Ground-Water Vulnerability Mapping Project (Hamerlinck and Arneson 1998). The maps are based on a simplification of the five soil forming factor model. Climate is proxied by elevation. This was derived from the 3-arc-second USGS Digital Elevation Model for the state. There is a strong correspondence between elevation and precipitation in the state, and temperature regimes can also generally be characterized by elevation. Vegetation is also closely tied to elevation, through its effect on precipitation and temperature. Three temperature regimes are mapped in Wyoming: cryic in the higher mountains; frigid in the foothills, the high plains along the Rocky Mountain front, low mountains and high intermountain basins; and mesic in lower elevation basins and the Great Plains See Appendix in the report for definitions of temperature regimes). There are small areas of a fourth temperature regime (pergelic) at elevations above 10,000 feet in the highest mountains in the state. Soil parent material is derived from the digital version of the state geology map (Green and Drouillard 1994) and the state surficial geology map by Case, Arneson, and Hallberg (1998). Vegetation is inferred from climate, slope, and parent material. Time, or soil age, is inferred from elevation and surficial geology. The topographic factor is inferred from elevation, surficial geology and bedrock geology. All the analysis of these layers was conducted using conducted using ARC/INFO Geographic Information System software on a Silicon Graphics UNIX workstation. For a complete list of references, please refer to the published report. Hudson, B.D. 1992. The soils survey as a paradigm-based science. Soil Sci. Soc. Am. J. 56:838-841. Hamerlinck, J.D., and Arneson, C.S., editors, 1998, Wyoming Ground- Water Vulnerability Assessment Handbook: Volume 1. Background, Model Development, and Aquifer Sensitivity Analysis: Spatial Data and Visualization Center Publication SDVC 98-01-1, University of Wyoming, Laramie, WY. Green, G.N. and P.H. Drouillard. 1994. The Digital Geologic Map of Wyoming in ARC/INFO Format. U.S. Geological Survey Open File Report 94- 0425. Jenny, H. 1941. Factors of Soil Formation. New York: McGraw-Hill. National Cartographic And GIS Center. 1998. STATSGO-Wyoming. USDA- Natural Resource Conservation Service. Fort Worth, TX Process_Date: 1998 Process_Step: Process_Description: A description of the decision rules used to model the soil units based on surficial geology, bedrock geology and elevation are explained below, including one example. For a full listing of all decision rules, please see the report. The state was divided into 10 "Soil Zones" based on geologic province. Graphic image of the Soil zones in Wyoming: 1.Yellowstone National Park area: mountains, cryic, udic. 2.Absaroka Volcanics: mountains, cryic, udic. 3.Middle Rocky Mountains: cryic, udic. 4.Bighorn Basin: intermountain basin, mesic, aridic. 5.Powder River Basin, Northern Great Plains: mesic, aridic. 6.Black Hills, mountains, frigid, ustic. 7.Southeast Wyoming: Northern Great Plains: frigid, aridic. 8.Medicine Bow and Laramie Mountains: mountains, cryic, udic. 9.Laramie and Wind River Basins: Wyoming Basin, frigid, aridic. 10.Green River Basin: Wyoming Basin, frigid, aridic. The soils in each zone were assigned to particular combinations of surficial geology and bedrock. Surficial geology units were grouped into 3 major types, with 4 special categories. A third classification element is elevation. Throughout most of Wyoming, the break between Frigid and Cryic temperature regimes occurs at approximately 7800 ft. The break between Mesic and Frigid occurs at 5000 ft in northern Wyoming and at 6500 ft in southern Wyoming. Landforms (from Surficial Geology Map of Wyoming 25 element classification) (Case, Arneson, and Hallberg 1998): Residual: aR, bi, bdi, mi, tre, ri, ui, Ri, Ki, ki, xi, Ti. Alluvial: Ai, ai, ti, tdi, oai. Colluvial: fi, fdi, li, sci. Special: eolian (ei); glacial (gi), playas (pea); mined (Mi) Bedrock geology (Love and Christiansen, 1985) was either keyed on the first letter of the code from the state bedrock geology map, or an individual unit is named specifically. Example of decision rules for Soil Zone 1: Default SMU is Dystrocryepts-Haplocryalfs, loamy-skeletal, mixed and Cryaquepts, fine-loamy over sandy or sandy-skeletal, mixed (WY01). If Landform is Alluvial, then SMU is Haplocryolls, fine-loamy, mixed and Cryaquepts, fine-loamy over sandy or sandy-skeletal, mixed (WY02). If Landform is Ri, then SMU is Cryorthents and Humic Dystrocryepts, loamy-skeletal, mixed and Cryaquepts, fine- loamy over sandy or sandy-skeletal, mixed (WY03). Process_Date: 1998 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: 15685 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: .001 Longitude_Resolution: .001 Geographic_Coordinate_Units: Decimal Degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: GRS1980 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: There is only one attribute associated with this dataset: SMU. There are 45 different units, labeled WY01 through WY45. These soil mapping units are organized by 10 different soil zones (see the Process Step for a description of the decision rules for creating the soil mapping units). Soil Map Unit (SMU) Descriptions: Soils Map of Wyoming Soil Zone 1: Yellowstone National Park Area. Mountains and high plateau. Cryic, udic and aquic. WY01: Typic Dystrocryepts-Typic Haplocryalfs, loamy-skeletal, mixedand Histic Cryaquepts, fine-loamy over sandy or sandy-skeletal, mixed. Under continuous coniferous forest (Lodgepole Pine, Englemann Spruce, Subalpine Fir, and Douglas Fir) soils on geologic parent materials and surfaces that are older than Pinedale are typically Haplocryalfs. The Yellowstone Plateau area was heavily glaciated during the Pinedale (Wisconsin) glaciation and most surfaces are of Late Pinedale or Holocene age. On these younger parent materials and/or surfaces, the dominant soils are Dystrocryepts. Cryaquepts occur in riparian areas. Inclusions may include Typic Cryofluvents along small channels and Cryofibrists in depressions in Pinedale moraines and along low gradient segments of streams. Typic Haplocryolls and Humic Dystrocryepts may occur in small openings in the forest. WY02: Typic Haplocryolls, fine-loamy and Histic Cryaquepts, fine-loamy over sandy or sandy-skeletal. Haplocryolls occur in mountain meadows which are predominately on south and west facing slopes, and are often on finer textured parent materials than surrounding forest soils. Cryaquepts occur along riparian areas. WY03: Typic Cryorthents and Humic Dystrocryepts, loamy-skeletal and Histic Cryaquepts, fine-loamy over sandy or sandy-skeletal. Topography for this unit is irregular, with Humic Dystrocryeptss occurring under grass or grass with scattered trees on small benches and low gradient segments of the slope. Cryorthents are on very steep slopes and around the base of rock outcrops. Cryaquepts occur along riparian areas. Soil Zone 2: Absaroka Volcanics. Mountains. Cryic, udic and aquic. WY03: Typic Cryorthents and Humic Dystrocryepts, loamy-skeletal and Histic Cryaquepts, fine-loamy over sandy or sandy skeletal. Soils are similar to those in Soil Zone 1, except that the mineralogy reflects volcanic parent materials. WY04: Typic Cryorthents, loamy-skeletal; Rock Outcrop; and Histic Cryaquepts, fine-loamy over sandy or sandy- skeletal. Thin Cryorthents and bedrock outcrops dominate this landscape. In narrow riparian areas between steep slopes, Cryaquepts have developed in accumulations of fine materials weathered from the surrounding uplands. WY05: Histic Cryaquepts fine-loamy over sandy or sandy-skeletal and Humic Dystrocryepts, loamy-skeletal. In alpine settings, the soils over most of the landscape are an association of Cryaquepts in riparian areas and Humic Dystrocryepts, with moderately deep profiles, on uplands. Umbric epipedons contain 6 to 8% organic matter and are typically 25 to 50 cm thick. Soil Zone 3: Middle Rocky Mountains. Cryic, udic and aquic. WY06: Typic Haplocryalfs, Typic Dystrocryepts and Typic Haplocryolls, loamy-skeletal and Histic Cryaquepts, fine-loamy over sandy or sandy-skeletal. On stable slopes which are older than Pinedale (Late Wisconsin), the predominate soils are Haplocryalfs. Dystrocryepts occur on slopes greater than 40%, and on Pinedale and younger surfaces (Pinedale tills and holocene surfaces). Haplocryolls occur under mountain meadow vegetation and are most common on south facing slopes. Cryaquepts are found along narrow riparian areas. WY07: Typic Haplocryolls, fine-loamy; Chromic Haplocryerts, fine and Histic Cryaquepts, fine-loamy. These soils occur on Mesozoic age bedrock with the Haplocryerts predominating on marine shales. Dominate vegetation is grass or forest with thin canopy coverage and clusters of aspen in wet areas. Cryaquepts predominate in riparian areas. WY08: Rock outcrop and Lithic Cryorthents, loamy-skeletal. These residual landscapes present a rugged appearance with 50 to 60% of the area covered by rock outcrop. The thin Cryorthents occur intermingled with the bedrock. WY42: Typic Hapludolls and Typic Hapludalfs, loamy-skeletal, mixed, frigid. These soils occur in the foothills along the flank of the higher mountains and represent a transition from the basins to the higher mountains. Hapludolls are common on south and west facing slopes; Hapludalfs predominate on north facing slopes and on both canyon walls of narrow canyons. Soil Zone 4: Bighorn Basin. Intermountain Basin. Mesic, aridic. WY09: Typic Haplargids and Typic Haplocalcids, fine-loamy over sandy or sandy-skeletal, mesic and Typic Torriorthents, fine-loamy and coarse-loamy, mesic. Aridisols occur on colluvial and alluvial landscapes while Entisols occur on residual landscapes. WY10: Typic Torripsamments, mesic. These soils are on stabilized dunes. They show little horizon development; thin A horizons are the most apparent change from the parent material (stabilized dune sand). WY11: Calcic Haplosalids, fine, mesic. These soils are associated with marine shales and occur in topographic depressions where run off water from the surrounding landscape accumulates and evaporates concentrating salt. WY12: Typic Torriorthents, loamy, mesic and Rock Outcrop. These soils form in a variety of sedimentary parent materials which are exposed along the perimeter of the basin. Soils are shallow or moderately deep to soft bedrock. WY13: Typic Torriorthents, fine, mesic and Rock Outcrop. These soils form over fine textured Cretaceous bedrock. Outcrops of shale occur as small badlands; outcrops of coarser textured rock support long, narrow ridges with finer textured soils along the flanks. WY14: Typic Haplargids and Typic Natrargids, fine-loamy or coarse-loamy, mesic. These soils occur on low gradient colluvial slopes (less than 15%) and reflect the texture of the underlying bedrock as well as the effects of slope processes. WY15: Typic Torrifluvents, sandy-skeletal, mesic and Typic Haplocambids, fine-loamy over sandy or sandy- skeletal, mesic. These soils occur on Holocene age terraces and slopes along small streams. The Torrifluvents occupy the first and second terraces above the modern channel. Soil Zone 5: Powder River Basin. Northern Great Plains. Mesic, aridic. WY16: Ustic Haplargids, Ustic Haplocalcids and Aridic Haplustolls, fine-loamy, mesic and Torriorthents, loamy- skeletal, mesic. These soils have formed from a variety of parent materials on Pleistocene and Holocene surfaces, weathered from Tertiary and other bedrocks. The Haplargids and Haplocalcids occur across broad expanses of the landscape. The Torriorthents occur along eroded drainage ways and around rock outcrops. The Haplustolls occur where snow accumulation significantly enhances soil water. WY17: Typic Torriorthents, loamy-skeletal, mesic and Rock Outcrop. These stony soils occupy ridge crests where coal bed fires have created clinker. The soils tend to be much coarser than the soils on the adjacent lower slopes, and contain hard clasts. WY18: Typic Torriorthents and Entic Haplustolls, fine-loamy, mesic. These soils occur on reconstructed landscapes which had been disturbed by mining. The occurrence of mollic epipedons is a function of reclamation practices and is not necessarily tied to topography or potential productivity. WY19: Typic Haplogypsids, fine, mesic. These soils occur in clayey playas where gypsum has accumulated in sufficient quantity to qualify as a gypsic horizon. WY42: Typic Hapludolls and Typic Hapludalfs, loamy-skeletal, mixed, frigid. These soils are similar to those in Soil Zone 3. They occur in foothills along the margin of the Powder River Basin. Soil Zone 6: Black Hills. Mountains. Frigid, udic and ustic. WY20: Typic Hapludalfs and Typic Argiudolls, fine-loamy and Typic Haplaquolls, fine, frigid. The Hapludalfs support open to dense stands of Ponderosa Pine. The Argiudolls occur under moist meadows, while the Haplaquolls occur along narrow riparian areas. WY21: Ustic Haplocambids and Ustic Torriorthents, fine, frigid and Rock Outcrop. These clayey soils are derived from acid shales and show little profile development. The Haplocambids occur on low gradient surfaces. Torriorthents occur intermingled with areas of shale outcrop in badlands-type topography. WY22: Typic Argiudolls and Typic Haplaquolls fine-loamy, frigid. These soils occur in moist meadows along riparian areas in the mountains. The Haplaquolls have accumulated greater amounts of organic matter due to their high water table. WY43: Ustic Haplargids and Ustic Haplocambids fine and fine-loamy, mesic. These soils have weathered from interbedded sandstones, siltstones and shales. The Haplargids are on low gradient slopes (less than 15%); the Haplocambids are on steeper slopes. Soil Zone 7: Southeast Wyoming. Northern Great Plains. Frigid and mesic, aridic. WY10: Typic Torripsamments as in Zone 4, except soil temperature regime is frigid. WY23: Typic Argiustolls, fine-loamy and Typic Argiustolls fine-loamy over sandy or sandy-skeletal, mixed, frigid. These soils occur on Tertiary and Pleistocene parent materials (mostly alluvial fan deposits of Tertiary age, or local alluvium of Pleistocene age.) WY24: Ustic Haplocambids and Ustic Torriorthents, fine, frigid. These moderately and weakly developed soils occur on gentle to steep slopes over the Tertiary White River formation. Profile development is shallow or moderately deep. WY25: Ustic Torriorthents and Aridic Ustochrepts, loamy-skeletal, frigid. These soils occur along the front of the Laramie Range and the Hartville uplift. The Ustochrepts support scattered stands of Ponderosa Pine. Soils are shallow or moderately deep and coarse textured. WY26: Ustic Torriorthents and Ustic Haplocambids, fine, frigid. These soils have developed on Cretaceous age bedrock (shale) and are moderately deep or shallow. The Haplocambids are on low gradient fans and slopes; Torriorthents occur on steeper slopes (greater than 15%). WY27: Typic Torrifluvents and Typic Haplaquolls, fine-loamy over sandy or sandy-skeletal, mixed, frigid These soils occur along riparian areas with the Torrifluvents developing along channels scoured by flooding and the Haplaquolls developing on low gradient channel sections where vegetation is well established and high water tables occur during most of the year. WY44: Ustic Haplargids and Ustic Torrifluvents, fine-loamy over sandy or sandy-skeletal, mixed, mesic. These soils occur on alluvium and slopes of Pleistocene and Holocene age over a variety of bedrocks. The Torrifluvents occur on the active floodplain; Haplargids occur on more stable landscape segments. Soil Zone 8: Medicine Bow and Laramie Mountains. Mountains. Cryic, udic and aquic. WY28: Typic Haplocryalfs and Typic Dystrocryepts, loamy-skeletal, mixed and Typic Haplocryolls, fine-loamy, mixed. Haplocryalfs occur under forest on till parent materials older than Pinedale (140,000 years old and older) and on non-glaciated landforms where the slope gradient is less than approximately 10%. Dystrocryepts occur under forest on till of Pinedale age and on slopes (>10%) that were unstable during the Pinedale glaciation. Haplocryolls occur under grasses and shrubs on west and south aspects and in dry parks on Tertiary age parent materials. WY29: Histic Cryaquepts and Typic Cryaquolls, fine-loamy over sandy or sandy-skeletal, mixed. These are poorly drained soils along riparian areas. Only A horizon thickness is different between the two soils (thicker in the Mollisols). Depth to water table in the profile varies from 0 to 50 cm over the course of the summer. WY30: Typic Dystrocryepts and Lithic Cryorthents, loamy skeletal, mixed and Rock Outcrop. These soils are found at high elevation and on very resistant parent materials. They are on eroding slopes, or the youngest tills in the region (Neoglacial). WY31: Typic Dystrocryepts and Typic Cryorthents, loamy skeletal, mixed. This unit occurs on Triassic, Permian and Cretaceous sedimentary rock along the flanks of the mountain range. The soils are moderately deep or shallow. WY32: Typic Dystrocryepts, loamy-skeletal, mixed and Rock Outcrop. These soils occur on Precambrian granitic parent materials. The Inceptisols are mostly moderately deep with less than 12% clay in their thin B horizons (Bw). The rock outcrops take the form of rounded boulders and sheets of rock. WY45: Typic Hapludalfs and Aridic Haplustepts, loamy-skeletal, mixed, frigid. These soils occur along the base of the mountain ranges in the region and support open stands of Ponderosa pine as well as other conifers. The Hapludalfs are on low relief slopes and nearly level surfaces. The Haplustrepts are on slopes greater than 15% and on the narrow valley floors of canyons. Soil Zone 9: Laramie and Wind River Basins. Intermountain basins. Frigid, aridic. WY09: Ustic Haplargids and Ustic Haplocalcids, fine-loamy over sandy or sandy-skeletal, frigid and Ustic Torriorthents, fine-loamy and coarse-loamy, frigid. In this region, the soils in this unit have frigid temperature regimes. These soils occur on old alluvial terraces along major rivers. Soils younger than mid-Pleistocene age are an association of Haplargids and Haplocalcids. On older landscapes,Haplocalcids predominate. Torriorthents occur along south facing terrace scarps; textural family is determined by underlying bedrock. WY10: Typic Torripsamments, frigid. These soils on stabilized dunes show little profile development, but are quite productive under native rangeland. WY33: Lithic Torriorthents, loamy-skeletal, frigid and Rock Outcrop. These soils occur along both sides of bedrock outcrops that form ridges along the flanks of the basins. The rock outcrop is usually sandstone or limestone. WY34: Ustic Haplargids and Ustic Natrargids, fine-loamy, frigid. These soils occur as an association on residual landscapes and in local colluvium derived from Tertiary age parent materials. Natrargids show less productivity under sagebrush and grass than Haplargids. WY35: Typic Natrargids and Typic Torriorthents, fine, frigid. These soils occur on landscapes underlain by Triassic and Cretaceous bedrock (shales). The Torriorthents occur in a badlands type topography, while the Natrargids occur on small, local alluvial fans at the foot of badland scarps, and on low gradient slopes. WY36: Ustic Torriorthents and Ustic Haplocalcids, coarse-loamy, frigid. These soils occur on calcareous sandstone of Permian age (redbeds). Haplocalcids occur on low gradient slopes; Torriorthents on slopes greater than 10%. WY37: Typic Petrocalcids and Ustic Calciargids, fine-loamy over sandy or sandy-skeletal, frigid. These soils occur on the highest terraces along major streams where the surfaces are mid Pleistocene age or older. On some surfaces, the petrocalcic horizon of the Palecalcids is nearly continuous; on other surfaces, Palecalcids and Haplocalcids occur as a complex. WY38: Ustic Haplocambids and Ustic Haplargids, coarse-loamy, frigid. These soils occur as a complex on late Pleistocene age terraces along major streams, and on slopes of less than 15% gradient of the same age. WY44: Ustic Haplargids and Typic Torrifluvents, fine-loamy over sandy or sandy-skeletal, mixed, mesic. These soils occur below 5000 feet in elevation in a relatively small area in the Wind River Basin. The Haplargids occur on alluvial terraces; the Torriorthents occur along the scarp slopes. Soil Zone 10: Green River Basin. Intermountain basin. Frigid, aridic. WY06: Typic Haplocryalfs, Typic Dystrocryepts and Typic Haplocryolls, loamy-skeletal, mixed and Histic Cryaquepts, fine-loamy over sandy or sandy-skeletal, mixed. These soils are similar to those in the same unit in Soil Zone 3. They are confined to the highest elevations of this region. WY10: Typic Torripsamments, frigid. These soils are very similar to Torripsamments in other areas of the state, except that they are intermingled with active dunes. WY11: Typic Haplosalids, fine, frigid. These Haplosalids occur in saline playas and are similar to those of this unit in Zone 4, except that they are frigid. WY17: Rock Outcrop and Typic Torriorthents, loamy-skeletal, mixed, frigid. These soils are similar to those in Soil Zone 5 except that the coarse fraction of the soil consists of clasts of the local bedrock, rather than clinker. WY39: Ustic Haplargids, Ustic Haplocambids and Ustic Natrargids, fine-loamy, mixed, frigid. On Tertiary parent materials along the flank of the Wyoming Range uplift, the soils are found in an association reflecting slope position and parent material sodium content. The Haplargids occur on stable, low gradient slopes. Haplocambids are on steeper slopes and Natrargids occur on fans where erosional processes have accumulated high sodium materials. WY40: Ustic Haplocambids and Ustic Torriorthents, coarse-loamy, mixed and Typic Torrifluvents, loamy-skeletal, mixed, frigid. This landscape has shallow and moderately deep Haplocambids and Torriorthents occurring on slopes along ephemeral channels and Torrifluvents along gully bottoms. WY41: Aridic Haplustolls and Ustic Haplocambids, fine-loamy, frigid. These soils are on Tertiary age parent materials along the edges of the basins under sagebrush-grasslands. The Haplustolls are on sites with extra moisture which promotes greater productivity. Entity_and_Attribute_Detail_Citation: Munn, L.C. and C.S. Arneson, 1998. Soils of Wyoming: A Digital Statewide Map at 1:500,000-Scale. Agricultural Experiment Station Report B-1069. University of Wyoming, College of Agriculture, Laramie, Wyoming. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Data Manager Contact_Organization: Spatial Data and Visualization Center Contact_Address: Address_Type: mailing address Address: Box 4008 University Station City: Laramie State_or_Province: Wyoming Country: USA Postal_Code: 82071 Contact_Voice_Telephone: 307-766-2735 Contact_Electronic_Mail_Address: n/a Distribution_Liability: The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate used described in this metadata document. The distributor makes no claims for the data's suitability for other purposes. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE (Arc/Info export) Format_Version_Number: 7.0.4 Format_Version_Date: 1995 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: see access instructions Access_Instructions: The data can be accessed online two different ways: By Web or by anonymous ftp server, ftp.sdvc.uwyo.edu, and the data is stored in the /pub/gis directory. The WWW page is http://www.sdvc.uwyo.edu/clearinghouse. Instructions are provided on-line for downloading and importing the data. Online_Computer_and_Operating_System: Both the ftp and WWW server which this data is available from is a Silicon Graphics Challenge server, running the IRIX 6.2 UNIX operating system. Fees: No fees are required for downloading the data that is on-line. Some fees may be required to cover costs of tapes if data is required on tape media. Metadata_Reference_Information: Metadata_Date: 19980812 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Margo Herdendorf Contact_Address: Address_Type: mailing address Address: Box 4008 University Station City: Laramie State_or_Province: Wyoming Postal_Code: 82071 Country: USA Contact_Voice_Telephone: 307-766-2751 Contact_Electronic_Mail_Address: meh@uwyo.edu Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: 19940608