Natural Resources
Conservation Service
Major Land Resource Area 124X
Major Land Resource Area
Accessed: 04/21/2026
Next steps
-
1
Select an ecological site
Select an ecological site using the list, keys, photos, briefcase, or quick search option located on this page. -
2
Explore the ecological site description
Next, learn more about the selected ecological site and its characteristic dynamics by browsing the ecological site description and exploring alternative state and transition model formats.
Ecological site list
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
-
i
Key Characteristics
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occuring on lava plateaus or erosion remnants, and skirting the adjacent hillslopes
- Soils moderately to very deep (oak/shrub savannahs)
- Not as above,
- Geology older (generally Mesozoic Era) or mixed ages associated with Sierra Nevada (beginning around Lake Oroville)
- Geology highly complex, interfingering of volcanic, sedimentary (metamorphozed), and some granitics. The break between MLRA 17 and MLRA 18 is more gradual than in the southern LRU's, lower foothill slopes gently to strongly sloping. (LRU I)
- Site not as above
- Site occurs on a hill or hillslope (various geologies)
- MAP is at least 18 inches
- MAP > 25 inches
- Not as above
- Site in thermic soil temperature regime
- Site not as above
- Site not as above
- Site dominated by volcanic bedrock
- Soil depth deep to deeper, oak woodland or savannah, AWC 3-7 - F018XI207CA
Ecological site map
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Zoom in to display soil survey map units for an area of interest, and zoom out to display MLRAs. Select a map unit polygon to view ecological sites correlated to that map unit. View a brief description of an ecological site by clicking on its name in the map popup. Soil survey correlations may not be accurate, and ecological site classification of a location should always be verified in the field. Each selection may require the transfer of several hundred KB of data.
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Add ecological sites and Major Land Resource Areas to your briefcase by clicking on the briefcase (
) icon wherever it occurs. Drag and drop items to reorder. Cookies are used to store briefcase items between browsing sessions. Because of this, the number of items that can be added to your briefcase is limited, and briefcase items added on one device and browser cannot be accessed from another device or browser. Users who do not wish to place cookies on their devices should not use the briefcase tool. Briefcase cookies serve no other purpose than described here and are deleted whenever browsing history is cleared.
Ecological sites
Major Land Resource Areas
Ecological site photos
Filters
F124XY006OH – Wet Lowland and Depression
F124XY003OH – Mixed Limestone Rich Upland
F124XY001OH – Shallow Acid Mixed Sedimentary Upland
F124XY002OH – Acid Mixed Sedimentary Upland
F124XY004OH – Acid Mixed Sedimentary Toeslope
F124XY005OH – Mixed Limestone Rich Sideslope
F124XY007OH – Upper Floodplain
F124XY008OH – Wet Floodplain and Drainageway
F124XY006OH – Wet Lowland and Depression
F124XY009OH – Coarse Terrace and Plain
F124XY010OH – Fine Terrace and Plain
F124XY009OH – Coarse Terrace and Plain
F124XY010OH – Fine Terrace and Plain
F124XY006OH – Wet Lowland and Depression
F124XY009OH – Coarse Terrace and Plain
F124XY010OH – Fine Terrace and Plain
F124XY010OH – Fine Terrace and Plain
F124XY006OH – Wet Lowland and Depression
F124XY100OH – Mine Spoil (reserved)
F124XY101OH – Urbanland (reserved)
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Ecological site keys
The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.
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