Natural Resources
Conservation Service
ecological site group ESG048A42
Aridic Finer Uplands
Accessed: 08/28/2026
Ecological site group description
Key Characteristics
- Uplands
- <75% bedrock outcrop
- Gypsum <5% surface, gypsum <10% subsurface, surface SAR <8, subsurface EC <8, and surface EC <4.
- EC<1.5 surface or <2 subsurface
- Soil not steep, rocky, or shallow
- Clay >30% surface or >35% subsurface
- sand <75% or texture is Loamy Fine Sand or finer in surface & subsurface
- Clay >20% or texture is Fine Sandy Loam or finer in surface AND Aridic soil moisture regime - 96 soil components
Provisional. An approved ecological site description has undergone quality control and quality assurance review. It contains a working state and transition model, enough information to identify the ecological site, and full documentation for all ecosystem states contained in the state and transition model.
Physiography
This ESG is located on mountain slopes, alluvial fans, and valley sides.
Climate
This ESG is characterized by the aridic soil moisture regime.
Soil features
This soil is characterized by clay >20% or texture is fine sandy loam or finer.
Vegetation dynamics
The modal ecological site for this ESG is F048AY908CO - Mixed Conifer.
Major Land Resource Area
MLRA 048A
Southern Rocky Mountains
Subclasses
- F048AY449CO–Aspen Woodland
- F048AY475UT–Mountain Very Steep Stony Loam (Douglas Fir)
- F048AY908CO–Mixed Conifer
- F048AY924CO–Douglas Fir/Gambel Oak
- F048AY925CO–Ponderosa Pine Forest
- R048AY001NM–Subalpine Grassland
- R048AY013NM–Mountain Slopes
- R048AY222CO–Loamy Park
- R048AY228CO–Mountain Loam
- R048AY237CO–Stony Loam
- R048AY238CO–Brushy Loam
- R048AY241CO–Mountain Meadow
- R048AY287CO–Stony Foothills
- R048AY292CO–Deep Loam
- R048AY303CO–Loamy Slopes
- R048AY306UT–Upland Loam (Wyoming Big Sagebrush)
- R048AY311CO–Mountain Outwash
- R048AY331UT–Upland Stony Loam (Pinyon-Utah Juniper)
- R048AY405UT–Mountain Loam (Mountain Big Sagebrush)
- R048AY451UT–Mountain Stony Loam (Browse)
Correlated Map Unit Components
20985829, 21054064, 21070414, 21070427, 21070460, 20993489, 21285286, 21285288, 21285368, 21285348, 21285351, 21285353, 21284292, 21281963, 21256475, 21256427, 21276614, 21276619, 21131270, 21131317, 21251736, 21251618, 21251667, 21250937, 21250671, 21245894, 21245510, 21245513, 21268273, 21244807, 21244810, 21244920, 21244942, 21243257, 21243274, 21243285, 21243276, 21243286, 21243325, 21243281, 21243306, 21243307, 21243327, 21243340, 21243341, 21243360, 21243362, 21243364, 21269771, 21242945, 21242947, 21242988, 21242986, 21242214, 21242215, 21834947, 21978757, 21978755, 21978441, 21978438, 21978642, 21978666, 21979394, 21979507, 21979688, 21979685, 21979158, 21979532, 21978919, 21979702, 21979141, 21980670, 21980029, 21980193, 21980541, 21979910, 21980682, 21981140, 21981137, 21981823, 21979888, 21981170, 21981179, 21981187, 21981269, 21981165, 21981239, 21981292, 21981917, 21981916, 21981774, 21840566, 21407149, 21407039, 21407019
Stage
Approved
Contributors
Travis Nauman
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