Natural Resources
Conservation Service
Major Land Resource Area 078C
Major Land Resource Area
Accessed: 04/20/2026
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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.
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precipitation
frost free days
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Viewing 20 of 29
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-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
-
i
Key Characteristics
- Sites concentrated around the east flanks of Crater lake
- Not as above
- Site occupying ash flows or alluvial fans
- Slopes flat to gentle, occupying low landscape positions in basins and drainages
- Soils somewhat excessively drained
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.
Briefcase
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
Tools
Filter by
interactive key
precipitation
frost free days
more..
clear all
Type
Image size
Done
Filters
Interactive key
Precipitation
Frost free days
Elevation
Slope
Landform
Parent material origin
Parent material kind
Soil texture
Upland
Bottomland
Clay sites
Sand sites
Loam sites
Sodium & surface crusting
R078CY091OK – Slickspot
R078CY091OK – Slickspot
No crusting
Depth to bedrock <20 inches
Depth to bedrock >20 inches
Correlated to the Knoco soil series
Not correlated to the Knoco soil series
R078CY067OK – Red Shale
R078CY067OK – Red Shale
Slope >20%
R078CY006OK – Clayey Breaks
R078CY006OK – Clayey Breaks
Slope <20%
R078CY114TX – Shallow Red Clay 23-31" PZ
R078CY114TX – Shallow Red Clay 23-31" PZ
Depth to bedrock <40 inches
Depth to bedrock >40 inches
North of MAAT 60
R078CY065OK – Red Clay (North)
R078CY065OK – Red Clay (North)
South of MAAT 60
R078CY112TX – Red Clay (South) 23-30" PZ
R078CY112TX – Red Clay (South) 23-30" PZ
Ponded
R078CY102TX – Lakebed 23-30" PZ
R078CY102TX – Lakebed 23-30" PZ
Not ponded
Smectitic minerology
R078CY095TX – Clay Flat 23-30" PZ
R078CY095TX – Clay Flat 23-30" PZ
Other minerology
R078CY096TX – Clay Loam 23-30" PZ
R078CY096TX – Clay Loam 23-30" PZ
Ponded or redox within 30 inches of surface
R078CY025OK – Depressional Upland
R078CY025OK – Depressional Upland
No ponding or redox within 30 inches of surface
Fine sand surface texture
Loamy fine sand surface texture
Argillic horizon
R078CY017OK – Deep Sand Shrubland
R078CY017OK – Deep Sand Shrubland
No argillic horizon
R078CY107TX – Sand Hills 23-31" PZ
R078CY107TX – Sand Hills 23-31" PZ
Argillic horizon
No argillic horizon
R078CY014OK – Rolling Sands
R078CY014OK – Rolling Sands
E horizon
R078CY098TX – Deep Sand 23-30" PZ
R078CY098TX – Deep Sand 23-30" PZ
No E horizon
R078CY105TX – Loamy Sand 23-31" PZ
R078CY105TX – Loamy Sand 23-31" PZ
Slope <20%
Slope >20%
R078CY005OK – Loamy Breaks
R078CY005OK – Loamy Breaks
Gypsum surface
R078CY038OK – Gyp
R078CY038OK – Gyp
No gypsum surface
Depth to bedrock <20 inches
R078CY083OK – Shallow Upland
R078CY083OK – Shallow Upland
Depth to bedrock >20 inches
FSL surface
R078CY110TX – Sandy Loam 23-31" PZ
R078CY110TX – Sandy Loam 23-31" PZ
Other surface texture
R078CY056OK – Loamy Upland
R078CY056OK – Loamy Upland
Clay sites
Sand sites
Loam sites
Salinity present
R078CY046OK – Saline Bottomland
R078CY046OK – Saline Bottomland
Salinity absent
R078CY094TX – Clayey Bottomland 23-30" PZ
R078CY094TX – Clayey Bottomland 23-30" PZ
Free water w/in 60 inches of surface
No free water w/in 60 inches of surface
R078CY068OK – Sandy Bottomland
R078CY068OK – Sandy Bottomland
Redox features w/in 12 inches of surface
R078CY090OK – Ponded Bottomland
R078CY090OK – Ponded Bottomland
Redox features found only below 12 inches of surface
R078CY095OK – Subirrigated Bottomland
R078CY095OK – Subirrigated Bottomland
Head of drainageways, rarely flooded
R078CY099TX – Draw 23-30" PZ
R078CY099TX – Draw 23-30" PZ
Commonly flooded bottomlands
R078CY103TX – Loamy Bottomland 23-31" PZ
R078CY103TX – Loamy Bottomland 23-31" PZ
Long term average mean annual precipitation
- No filter
- 60 – 80cm (24 – 31in)
—
cm
Long term average frost free days
- No filter
- 150 – 170days
- 170 – 190days
- 190 – 210days
—
days
- No filter
- 200 – 400m (700 – 1300ft)
- 400 – 600m (1300 – 2000ft)
- 600 – 800m (2000 – 2600ft)
- 800 – 1000m (2600 – 3300ft)
- 1000 – 1200m (3300 – 3900ft)
- 1200 – 1400m (3900 – 4600ft)
—
m
- No filter
- 0 – 3%
- 3 – 5%
- 5 – 10%
- 10 – 15%
- 15 – 20%
- 20 – 25%
- 25 – 30%
- 30 – 35%
- 35 – 40%
- 40 – 45%
- 45 – 50%
—
%
- No filter
- Depression
- Draw
- Dune
- Escarpment
- Flood plain
- Hill
- Hillslope
- Knob
- Paleoterrace
- Pediment
- Plain
- Playa
- Ridge
- Sand sheet
- Stream terrace
- Terrace
- Valley
- Valley flat
- Valley floor
- No filter
- Claystone
- Granite
- Gypsum, rock
- Limestone and sandstone
- Quartzite
- Sandstone and shale
- Sandstone, calcareous
- Sandstone, unspecified
- Shale and siltstone
- Shale, calcareous
- Shale, unspecified
- Siltstone, calcareous
- No filter
- Alluvium
- Eolian sands
- Residuum
Soil surface texture
- No filter
- Clay
- Clay loam
- Fine sand
- Fine sandy loam
- Loam
- Loamy fine sand
- Loamy sand
- Sand
- Silty clay
- Silty clay loam
- Silt loam
- Very fine sandy loam
Print Options
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Ecological site keys
MLRA 78C
I.
Upland
A.
Clay sites
2.
No crusting
i.
Depth to bedrock <20 inches
a.
Correlated to the Knoco soil series
ii.
Depth to bedrock >20 inches
a.
Depth to bedrock <40 inches
b.
Depth to bedrock >40 inches
2)
Not ponded
B.
Sand sites
2.
No ponding or redox within 30 inches of surface
i.
Fine sand surface texture
ii.
Loamy fine sand surface texture
a.
Argillic horizon
C.
Loam sites
1.
Slope <20%
ii.
No gypsum surface
b.
Depth to bedrock >20 inches
II.
Bottomland
A.
Clay sites
B.
Sand sites
1.
Free water w/in 60 inches of surface
C.
Loam sites
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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