Natural Resources
Conservation Service
Major Land Resource Area 080B
Major Land Resource Area
Accessed: 04/02/2026
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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.
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i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
-
i
Key Characteristics
- Resides north of Columbia River.
- Sites has less than 20% cover of trees over 13 feet in height.
- The site occurs on depressions, swales on flood plains or terraces.
- Soil are non-hydric and not saturated to the surface, but plants are water tolerant.
- Site elevation is approximately 6,000 to 7,600 feet; cryic temperature regime.
- Cryic temperature regime, elevations above 3,500 ft
- Site occurring on floodplains and low stream terraces
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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Ecological sites
Major Land Resource Areas
Ecological site photos
Tools
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interactive key
precipitation
frost free days
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Interactive key
Precipitation
Frost free days
Elevation
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Landform
Parent material origin
Parent material kind
Soil texture
Landform is a flood plain or flood-plain step
Landform is a drainageway
Landform is a stream terrace
Landform is a dip slope or low ridge (Upland ridge top with less than 10 percent slope gradient)
Landform is a scarp slope
Landform is on a strike valley
Clayey surface texture …R080BY144TX - Clayey Bottomland 26-33" PZ
R080BY144TX – Clayey Bottomland 26-33" PZ
R080BY144TX – Clayey Bottomland 26-33" PZ
Loamy surface texture … R080BY151TX - Loamy Bottomland 26-33" PZ
R080BY151TX – Loamy Bottomland 26-33" PZ
R080BY151TX – Loamy Bottomland 26-33" PZ
Sandy surface texture … Go to MLRA 84B Key
Dark red (Permian) colors within 60” …Go to MLRA 80A Key
7.5YR to 10YR colors throughout (Pennsylvanian sediments) …Draw (Not yet established)
Sandy surface texture
Loamy surface texture
Clayey surface texture …R080BY607TX - Clayey Upland 26-33" PZ
R080BY607TX – Clayey Upland 26-33" PZ
R080BY607TX – Clayey Upland 26-33" PZ
Greater than 80” of fine sand (no lamellae or clay increase)
R080BY690TX – SAND HILLS 26-33" PZ
R080BY690TX – SAND HILLS 26-33" PZ
Clay increase within 80” (argillic horizon or lamellae)
Greater than 20” of sand or loamy sand over argillic horizon
Less than 20” of sand or loamy sand over argillic horizon … R080BY153TX - Loamy Sand 26-33" PZ
R080BY153TX – Loamy Sand 26-33" PZ
R080BY153TX – Loamy Sand 26-33" PZ
Argillic horizon present
Argillic horizon not present
Clayey argillic horizon … R080BY164TX - Tight Sandy Loam 26-33" PZ
R080BY164TX – Tight Sandy Loam 26-33" PZ
R080BY164TX – Tight Sandy Loam 26-33" PZ
Loamy argillic horizon … R080BY159TX - Sandy Loam 26-33" PZ
R080BY159TX – Sandy Loam 26-33" PZ
R080BY159TX – Sandy Loam 26-33" PZ
Sandy Clay Loam or coarser surface texture …R080BY159TX - Sandy Loam 26-33" PZ
R080BY159TX – Sandy Loam 26-33" PZ
R080BY159TX – Sandy Loam 26-33" PZ
Loam, Clay Loam or silty surface texture …R080BY146TX - Clay Loam 26-33" PZ
R080BY146TX – Clay Loam 26-33" PZ
R080BY146TX – Clay Loam 26-33" PZ
Limestone bedrock or petrocalcic horizon (caliche) within 60”
Sandstone or conglomerate bedrock within 60”
Limestone bedrock or petrocalcic horizon within 40”
Limestone bedrock or petrocalcic horizon greater than 40”Go to Key 6
Surface horizon is noneffervescent to slightly effervescent
Surface horizon is strongly to violently effervescent …R080BY160TX
R080BY160TX – Shallow 26-33" PZ
R080BY160TX – Shallow 26-33" PZ
Subsurface horizons are clayey with red colors
Subsurface horizons are not clayey with red colors
Lithic contact with limestone within 20” …R080BY155TX
R080BY155TX – Redland 26-33" PZ
R080BY155TX – Redland 26-33" PZ
Lithic contact with limestone greater than 20” …R080BY148TX
R080BY148TX – Deep Redland 26-33" PZ
R080BY148TX – Deep Redland 26-33" PZ
Lithic contact with limestone within 20” …R080BY154TX
R080BY154TX – Low Stony Hill 26-33" PZ
R080BY154TX – Low Stony Hill 26-33" PZ
Lithic contact with limestone greater than 20” …R080BY146TX
R080BY146TX – Clay Loam 26-33" PZ
R080BY146TX – Clay Loam 26-33" PZ
Sandstone bedrock within 20” …R080BY157TX
R080BY157TX – Sandstone Hill 26-33" PZ
R080BY157TX – Sandstone Hill 26-33" PZ
Sandstone bedrock greater than 20”
Greater than 5% surface cover of sandstone fragments …R080BY157TX
R080BY157TX – Sandstone Hill 26-33" PZ
R080BY157TX – Sandstone Hill 26-33" PZ
Less than 5% surface cover of sandstone fragments
Clayey subsurface horizons …R080BY164TX
R080BY164TX – Tight Sandy Loam 26-33" PZ
R080BY164TX – Tight Sandy Loam 26-33" PZ
Loamy subsurface horizons
Sandy surface texture (Loamy sand or sand) …R080BY153TX
R080BY153TX – Loamy Sand 26-33" PZ
R080BY153TX – Loamy Sand 26-33" PZ
Loamy surface texture (Sandy Loam, Sandy Clay Loam, Loam)…R080BY159TX
R080BY159TX – Sandy Loam 26-33" PZ
R080BY159TX – Sandy Loam 26-33" PZ
Greater than 5% surface cover of stones and boulders
Less than 5% surface cover of stone and boulders
Soil is noncalcareous within 20”
Soil is calcareous within 20”
Limestone/sandstone bedrock not within 40”
Limestone stones and boulders cover surface
R080BY163TX – Steep Rocky 26-33" PZ
R080BY163TX – Steep Rocky 26-33" PZ
Conglomerate or sandstone stones and boulders cover surface
R080BY143TX – Bouldery Hill 26-33
R080BY143TX – Bouldery Hill 26-33
Limestone/sandstone bedrock within 40” (Structural bench) …R080BY163TX
R080BY163TX – Steep Rocky 26-33" PZ
R080BY163TX – Steep Rocky 26-33" PZ
Mollic surface colors not present …R080BY15TX
R080BY156TX – Rocky Hill 26-33" PZ
R080BY156TX – Rocky Hill 26-33" PZ
Mollic epipedon or thin mollic if eroded …R080BY163TX
R080BY163TX – Steep Rocky 26-33" PZ
R080BY163TX – Steep Rocky 26-33" PZ
Limestone/sandstone bedrock within 40” (Structural bench) …Go to Key 4
Limestone/sandstone bedrock not within 40”
Greater than 30” to shale/claystone bedrock …R080BY604TX
R080BY604TX – Clay Slopes 26-33" PZ
R080BY604TX – Clay Slopes 26-33" PZ
Less than 30” to shale/claystone bedrock …Key 4
Soil is calcareous within 10”
Soil is not calcareous within 10”
Less than 30” to shale/claystone bedrock
Greater than 30” to bedrock
Slickensides not present in subsurface; limited cracking to surface when dry
Slickensides present in subsurface; cracks to surface when dry …R080BY607TX
R080BY607TX – Clayey Upland 26-33" PZ
R080BY607TX – Clayey Upland 26-33" PZ
Less than 60” to shale/claystone bedrock …R080BY604TX
R080BY604TX – Clay Slopes 26-33" PZ
R080BY604TX – Clay Slopes 26-33" PZ
Greater than 60” to shale/claystone bedrock …R080BY146TX
R080BY146TX – Clay Loam 26-33" PZ
R080BY146TX – Clay Loam 26-33" PZ
Mollic epipedon (and not hard setting)
Ochric epipedon (including hard setting mollic epipedons)
Less than 20 percent clay content in surface horizon …R080BY152TX
R080BY152TX – Loamy 26-33" PZ
R080BY152TX – Loamy 26-33" PZ
Greater than 20 percent clay content in surface horizon …R080BY146TX
R080BY146TX – Clay Loam 26-33" PZ
R080BY146TX – Clay Loam 26-33" PZ
Hard setting surface horizon …R080BY147TX
R080BY147TX – Claypan 26-33" PZ
R080BY147TX – Claypan 26-33" PZ
Surface horizon is not hard setting
Sandy surface horizon
Loamy surface horizon (sandy loam, sandy clay loam, loam, etc.)
Greater than 20” of sand or loamy sand over argillic horizonGo to MLRA 84B Key
Less than 20” of sand or loamy sand over argillic horizon …R080BY153TX
R080BY153TX – Loamy Sand 26-33" PZ
R080BY153TX – Loamy Sand 26-33" PZ
Argillic horizon present
Argillic horizon not present …R080BY146TX
R080BY146TX – Clay Loam 26-33" PZ
R080BY146TX – Clay Loam 26-33" PZ
Clayey argillic horizon … R080BY164TX
R080BY164TX – Tight Sandy Loam 26-33" PZ
R080BY164TX – Tight Sandy Loam 26-33" PZ
Loamy argillic horizon … R080BY159TX
R080BY159TX – Sandy Loam 26-33" PZ
R080BY159TX – Sandy Loam 26-33" PZ
Long term average mean annual precipitation
- No filter
- 80 – 100cm (31 – 39in)
—
cm
Long term average frost free days
- No filter
- 190 – 210days
- 210 – 230days
- 230 – 250days
—
days
- No filter
- 200 – 400m (700 – 1300ft)
- 400 – 600m (1300 – 2000ft)
- 600 – 800m (2000 – 2600ft)
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
- 15 – 20%
- 20 – 25%
- 25 – 30%
- 30 – 35%
- 35 – 40%
—
%
- No filter
- Dip slope
- Flood plain
- Flood-plain step
- Hillslope
- Paleoterrace
- Ridge
- Scarp slope
- Stream terrace
- Structural bench
- No filter
- Claystone
- Conglomerate, unspecified
- Limestone and shale
- Limestone, sandstone and shale
- Limestone, unspecified
- Sandstone, unspecified
- No filter
- Alluvium
- Colluvium
- Residuum
- Slope alluvium
Soil surface texture
- No filter
- Clay
- Clay loam
- Fine sandy loam
- Loam
- Loamy fine sand
- Silty clay
- Silty clay loam
- Silt loam
- Sandy loam
- Very fine sandy loam
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Ecological site keys
MLRA 80B Ecological Site Key
1
Landform is a flood plain or flood-plain step
A.
Clayey surface texture …R080BY144TX - Clayey Bottomland 26-33" PZ
... R080BY144TX – Clayey Bottomland 26-33" PZ
B.
Loamy surface texture … R080BY151TX - Loamy Bottomland 26-33" PZ
... R080BY151TX – Loamy Bottomland 26-33" PZ
C.
Sandy surface texture … Go to MLRA 84B Key
2
Landform is a drainageway
A.
Dark red (Permian) colors within 60” …Go to MLRA 80A Key
B.
7.5YR to 10YR colors throughout (Pennsylvanian sediments) …Draw (Not yet established)
3
Landform is a stream terrace
A.
Sandy surface texture
1
Greater than 80” of fine sand (no lamellae or clay increase)
... R080BY690TX – SAND HILLS 26-33" PZ
2
Clay increase within 80” (argillic horizon or lamellae)
a.
Greater than 20” of sand or loamy sand over argillic horizon
b.
Less than 20” of sand or loamy sand over argillic horizon … R080BY153TX - Loamy Sand 26-33" PZ
... R080BY153TX – Loamy Sand 26-33" PZ
B.
Loamy surface texture
1
Argillic horizon present
a.
Clayey argillic horizon … R080BY164TX - Tight Sandy Loam 26-33" PZ
... R080BY164TX – Tight Sandy Loam 26-33" PZ
b.
Loamy argillic horizon … R080BY159TX - Sandy Loam 26-33" PZ
... R080BY159TX – Sandy Loam 26-33" PZ
2
Argillic horizon not present
a.
Sandy Clay Loam or coarser surface texture …R080BY159TX - Sandy Loam 26-33" PZ
... R080BY159TX – Sandy Loam 26-33" PZ
b.
Loam, Clay Loam or silty surface texture …R080BY146TX - Clay Loam 26-33" PZ
... R080BY146TX – Clay Loam 26-33" PZ
C.
Clayey surface texture …R080BY607TX - Clayey Upland 26-33" PZ
... R080BY607TX – Clayey Upland 26-33" PZ
4
Landform is a dip slope or low ridge (Upland ridge top with less than 10 percent slope gradient)
1
Limestone bedrock or petrocalcic horizon (caliche) within 60”
A.
Limestone bedrock or petrocalcic horizon within 40”
1
Surface horizon is noneffervescent to slightly effervescent
a.
Subsurface horizons are clayey with red colors
ii.
Lithic contact with limestone greater than 20” …R080BY148TX
... R080BY148TX – Deep Redland 26-33" PZ
b.
Subsurface horizons are not clayey with red colors
ii.
Lithic contact with limestone greater than 20” …R080BY146TX
... R080BY146TX – Clay Loam 26-33" PZ
2
Surface horizon is strongly to violently effervescent …R080BY160TX
... R080BY160TX – Shallow 26-33" PZ
B.
Limestone bedrock or petrocalcic horizon greater than 40”Go to Key 6
2
Sandstone or conglomerate bedrock within 60”
B.
Sandstone bedrock greater than 20”
1
Greater than 5% surface cover of sandstone fragments …R080BY157TX
... R080BY157TX – Sandstone Hill 26-33" PZ
2
Less than 5% surface cover of sandstone fragments
b.
Loamy subsurface horizons
ii.
Loamy surface texture (Sandy Loam, Sandy Clay Loam, Loam)…R080BY159TX
... R080BY159TX – Sandy Loam 26-33" PZ
5
Landform is a scarp slope
1
Greater than 5% surface cover of stones and boulders
A.
Soil is noncalcareous within 20”
B.
Soil is calcareous within 20”
1
Limestone/sandstone bedrock within 40” (Structural bench) …R080BY163TX
... R080BY163TX – Steep Rocky 26-33" PZ
C.
Limestone/sandstone bedrock not within 40”
2
Less than 5% surface cover of stone and boulders
A.
Limestone/sandstone bedrock within 40” (Structural bench) …Go to Key 4
B.
Limestone/sandstone bedrock not within 40”
2
Less than 30” to shale/claystone bedrock …Key 4
6
Landform is on a strike valley
1
Soil is calcareous within 10”
A.
Less than 30” to shale/claystone bedrock
B.
Greater than 30” to bedrock
1
Slickensides present in subsurface; cracks to surface when dry …R080BY607TX
... R080BY607TX – Clayey Upland 26-33" PZ
2
Slickensides not present in subsurface; limited cracking to surface when dry
2
Soil is not calcareous within 10”
A.
Mollic epipedon (and not hard setting)
1
Less than 20 percent clay content in surface horizon …R080BY152TX
... R080BY152TX – Loamy 26-33" PZ
2
Greater than 20 percent clay content in surface horizon …R080BY146TX
... R080BY146TX – Clay Loam 26-33" PZ
B.
Ochric epipedon (including hard setting mollic epipedons)
2
Surface horizon is not hard setting
a.
Sandy surface horizon
i.
Greater than 20” of sand or loamy sand over argillic horizonGo to MLRA 84B Key
ii.
Less than 20” of sand or loamy sand over argillic horizon …R080BY153TX
... R080BY153TX – Loamy Sand 26-33" PZ
b.
Loamy surface horizon (sandy loam, sandy clay loam, loam, etc.)
i.
Argillic horizon present
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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