Natural Resources
Conservation Service
Major Land Resource Area 078B
Major Land Resource Area
Accessed: 04/21/2026
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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.
Ecological site list
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precipitation
frost free days
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Viewing 20 of 23
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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
Ecological site map
Basemap
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Find point
Full screen
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
Uplands
Floodplains
>30% surface gravel
R078BY075TX – Gravelly 20-24" PZ
R078BY075TX – Gravelly 20-24" PZ
<30% surface gravel
>20% slopes
<20% slopes
Over claystone
R078BY094TX – Clayey Breaks
R078BY094TX – Clayey Breaks
Not over claystone
R078BY084TX – Rough Breaks 19-26" PZ
R078BY084TX – Rough Breaks 19-26" PZ
<20 inches to restrictive layer
>20 inches to restrictive layer
Over claystone
R078BY092TX – Very Shallow Clay 19-26" PZ
R078BY092TX – Very Shallow Clay 19-26" PZ
Over sandstone
Over limestone/caliche
R078BY091TX – Very Shallow 19-26" PZ
R078BY091TX – Very Shallow 19-26" PZ
Over gypsum
R078BY076TX – Gyp 19-26" PZ
R078BY076TX – Gyp 19-26" PZ
<10 inches to bedrock
R078BY701TX – Shallow Sandstone 19-26" PZ
R078BY701TX – Shallow Sandstone 19-26" PZ
>10 inches to bedrock
R078BY089TX – Shallow 19-26" PZ
R078BY089TX – Shallow 19-26" PZ
<40 inches to claystone
R078BY090TX – Shallow Clay 19-26" PZ
R078BY090TX – Shallow Clay 19-26" PZ
>40 inches to claystone
Soils ponded / depressional areas
R078BY078TX – Lakebed 19-26" PZ
R078BY078TX – Lakebed 19-26" PZ
No ponding or depressional areas
Sandy surface FS, LFS
Sandy loam surface FSL
R078BY088TX – Sandy Loam 19-26" PZ
R078BY088TX – Sandy Loam 19-26" PZ
Clay loam surface CL
R078BY072TX – Clay Loam 19-26" PZ
R078BY072TX – Clay Loam 19-26" PZ
Clay surface
R078BY071TX – Clay Flat 19-26" PZ
R078BY071TX – Clay Flat 19-26" PZ
Loamy surface
With argillic horizon/lamellae
No argillic horizon/lamellae
R078BY085TX – Sand Hills 19-26" PZ
R078BY085TX – Sand Hills 19-26" PZ
Sandy surface more than 50cm
R078BY086TX – Sandy 19-26" PZ
R078BY086TX – Sandy 19-26" PZ
Sandy surface less than 50cm
R078BY082TX – Loamy Sand 19-26" PZ
R078BY082TX – Loamy Sand 19-26" PZ
Calcareous soils
R078BY079TX – Loamy 19-26" PZ
R078BY079TX – Loamy 19-26" PZ
Non-calcareous soils
R078BY081TX – Loamy Upland 19-26" PZ
R078BY081TX – Loamy Upland 19-26" PZ
Water table <30 inches from surface
R078BY093TX – Wet Bottomland 19-26" PZ
R078BY093TX – Wet Bottomland 19-26" PZ
Water table >30 inches from surface
Clay surface texture
R078BY070TX – Clayey Bottomland 19-26" PZ
R078BY070TX – Clayey Bottomland 19-26" PZ
Sandy surface texture
R078BY087TX – Sandy Bottomland 19-26" PZ
R078BY087TX – Sandy Bottomland 19-26" PZ
Loamy surface texture
head of drainageways, rare flooding
R078BY074TX – Draw 19-26" PZ
R078BY074TX – Draw 19-26" PZ
Commonly flooded bottomlands
R078BY080TX – Loamy Bottomland 19-26" PZ
R078BY080TX – Loamy Bottomland 19-26" PZ
Long term average mean annual precipitation
- No filter
- 50 – 60cm (20 – 24in)
- 60 – 80cm (24 – 31in)
—
cm
Long term average frost free days
- No filter
- 170 – 190days
- 190 – 210days
- 210 – 230days
—
days
- No filter
- 200 – 400m (700 – 1300ft)
- 400 – 600m (1300 – 2000ft)
- 600 – 800m (2000 – 2600ft)
- 800 – 1000m (2600 – 3300ft)
- 1000 – 1200m
—
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%
- 50 – 60%
—
%
- No filter
- Alluvial fan
- Alluvial flat
- Depression
- Divide
- Dune
- Escarpment
- Flood plain
- Hill
- Hillslope
- Outwash plain
- Pediment
- Plain
- Playa
- Ridge
- Scarp
- Scarp slope
- Stream terrace
- Structural bench
- Swale
- Terrace
- Valley flat
- No filter
- Claystone
- Gypsum, rock
- Limestone and dolomite
- Quartzite
- Sandstone and siltstone
- Sandstone, unspecified
- Shale and siltstone
- Shale, clayey
- Shale, unspecified
- No filter
- Alluvium
- Colluvium
- Eolian deposits
- Eolian sands
- Residuum
Soil surface texture
- No filter
- Clay
- Clay loam
- Coarse sand
- Fine sand
- Fine sandy loam
- Loam
- Loamy fine sand
- Sand
- Sandy clay
- Sandy clay loam
- Silty clay
- Silty clay loam
- Sandy loam
- Very fine sandy loam
Print Options
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Ecological site keys
MLRA 78B
I.
Uplands
B.
<30% surface gravel
1.
>20% slopes
2.
<20% slopes
i.
<20 inches to restrictive layer
b.
Over sandstone
ii.
>20 inches to restrictive layer
b.
>40 inches to claystone
2)
No ponding or depressional areas
a)
Sandy surface FS, LFS
(1)
With argillic horizon/lamellae
e)
Loamy surface
II.
Floodplains
B.
Water table >30 inches from surface
3.
Loamy surface texture
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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