Soil Survey of Sweet Grass County Area, Montana
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How to Use This Soil Survey Detailed Soil Maps The detailed soil maps can be useful in planning the use and management of small areas. To find information about your area of interest, you can locate the Section, Township, and Range by zooming in on the Index to Map Sheets, or you can go to the Web Soil Survey at (http://websoilsurvey.nrcs.usda.gov/app/). Note the map unit symbols that are in that area. The Contents lists the map units by symbol and name and shows the page where each map unit is described. See the Contents for sections of this publication that may address your specific needs. ii This soil survey is a publication of the National Cooperative Soil Survey, a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (formerly the Soil Conservation Service) has leadership for the Federal part of the National Cooperative Soil Survey. Major fieldwork for this soil survey was completed in 1997. Soil names and descriptions were approved in 1997. Unless otherwise indicated, statements in this publication refer to conditions in the survey area in 1997. This survey was made cooperatively by the Natural Resources Conservation Service and the Montana Agricultural Experiment Station. It is part of the technical assistance furnished to the Sweet Grass County Conservation District. The most current official data are available through the NRCS Soil Data Mart website at http://soildatamart.nrcs.usda.gov. Soil maps in this survey may be copied without permission. Enlargement of these maps, however, could cause misunderstanding of the detail of mapping. If enlarged, maps do not show the small areas of contrasting soils that could have been shown at a larger scale. The United States Department of Agriculture (USDA) prohibits discrimination in all of its programs on the basis of race, color, national origin, gender, religion, age, disability, political beliefs, sexual orientation, and marital or family status. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact the USDA’s TARGET Center at 202-720-2600 (voice or TDD). To file a complaint of discrimination, write USDA, Director, Office of Civil Rights, Room 326W, Whitten Building, 14th and Independence Avenue SW, Washington, DC 20250-9410, or call 202-720-5964 (voice or TDD). USDA is an equal opportunity provider and employer. Cover: Two dominant features of the Sweet Grass County landscape are the Yellowstone River and Crazy Mountains. The river valley soils in this view are mainly Fairway and Korchea loams. Soils that are commonly found in the rangeland are Cabbart loam, Yawdim clay loam, and Reedpoint very channery loams. The high terraces in the background are mostly Roy and Tamaneen cobbly loams. Representative soils in the upper foothills are Adel loam on the rangeland and Stemple very cobbly loam in the forested areas. Additional information about the Nation’s natural resources is available online from the Natural Resources Conservation Service at http://www.nrcs.usda.gov. iii Contents Part I Beaverton Series ............................................... 34 Beehive Series ................................................... 35 How To Use This Soil Survey .................................. i Beenom Taxadjunct ........................................... 36 Alphabetical Index to Map Units ........................ xiv Bigsag Family .................................................... 37 Summary of Tables ..............................................xxii Birney Series ..................................................... 38 Foreword ............................................................. xxv Blacksheep Series ............................................. 39 General Nature of the Survey Area .......................... 1 Blossberg Taxadjunct......................................... 39 History and Development .................................... 1 Bonebasin Series .............................................. 41 Industry, Transportation, and Recreation ............. 2 Bowery Series.................................................... 42 Natural Resources ............................................... 3 Boxwell Series ................................................... 43 Physiography, Drainage, and Geology ................ 3 Breeton Series ................................................... 44 Mining .................................................................. 9 Bridger Series .................................................... 44 Oil, Gas, and Coal ............................................. 10 Cabba Series ..................................................... 46 Geothermal Resources ...................................... 10 Cabbart Series ................................................... 46 Ground-Water Resources .................................. 10 Cambeth Series ................................................. 47 Seismicity........................................................... 11 Castner Series ................................................... 48 Climate............................................................... 11 Cheadle Series .................................................. 49 How This Survey Was Made .................................. 12 Chinook Series .................................................. 50 Formation and Classification of the Soils .......... 17 Clunton Series ................................................... 51 Formation of the Soils ............................................ 17 Cowood Series .................................................. 52 Climate............................................................... 17 Creed Series ...................................................... 53 Living Organisms ............................................... 17 Danaher Series .................................................. 54 Topography ........................................................ 18 Danvers Series .................................................. 56 Parent Material .................................................. 18 Delpoint Series .................................................. 57 Time ................................................................... 19 Dimmick Series .................................................. 58 Classification of the Soils ....................................... 19 Doby Series ....................................................... 59 Soil Series and Their Morphology....................... 20 Doney Series ..................................................... 59 Absarokee Series .............................................. 20 Duckcreek Series............................................... 60 Absher Family .................................................... 21 Elve Series ......................................................... 61 Absher Series .................................................... 23 Ethridge Series .................................................. 62 Adel Series ........................................................ 24 Evanston Series ................................................. 63 Albicalis Taxadjunct ........................................... 25 Fairfield Series ................................................... 64 Amherst Series .................................................. 26 Fairway Series ................................................... 66 Amor Series ....................................................... 27 Farnuf Series ..................................................... 67 Arrowpeak Series .............................................. 28 Fifer Series ........................................................ 68 Ashbon Series ................................................... 29 Foolhen Series ................................................... 69 Attewan Series ................................................... 30 Frenchcreek Series ............................................ 70 Bacbuster Series ............................................... 31 Gerdrum Series ................................................. 71 Bearmouth Taxadjunct ....................................... 32 Gilispie Series .................................................... 72 Beaverell Series ................................................. 33 Greybear Series................................................. 73 iv Havre Series ...................................................... 74 Redfern Series ................................................. 116 Hinterland Series ............................................... 75 Reedpoint Series ............................................. 117 Klayent Series .................................................... 76 Reedwest Series.............................................. 118 Knep Family ....................................................... 78 Rentsac Series ................................................ 118 Knep Series ....................................................... 78 Richey Series................................................... 119 Kobase Series ................................................... 79 Rocko Series ................................................... 120 Korchea Series .................................................. 80 Roy Series ......................................................