Natural Resources
Conservation Service
ecological site group ESG048A37
Udic Clay 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 AND Udic soil moisture regime - 216 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 and complex landslides.
Climate
This ESG is characterized by the udic soil moisture regime.
Soil features
This ESG is characterized by clay >30% surface or >35% subsurface.
Vegetation dynamics
The modal ecological site for this ESG is F048AY449CO - Aspen Woodland.
Major Land Resource Area
MLRA 048A
Southern Rocky Mountains
Subclasses
- F048AY449CO–Aspen Woodland
- F048AY506UT–High Mountain Loam (Aspen)
- F048AY908CO–Mixed Conifer
- F048AY917CO–Abies lasiocarpa/Paxistima myrsinites/Erigeron eximius
- F048AY918CO–Spruce-Fir Woodland
- F048AY924CO–Douglas Fir/Gambel Oak
- R048AY006NM–Mountain Meadow
- R048AY222CO–Loamy Park
- R048AY228CO–Mountain Loam
- R048AY237CO–Stony Loam
- R048AY238CO–Brushy Loam
- R048AY241CO–Mountain Meadow
- R048AY247CO–Deep Clay Loam
- R048AY250CO–Subalpine Loam
- R048AY252CO–Subalpine Clay
- R048AY304CO–Alpine Slopes
Correlated Map Unit Components
20976070, 20987095, 20987178, 20988200, 21054024, 20992095, 20993787, 20993790, 20993828, 20994037, 20993705, 20993682, 20994440, 20994416, 20994338, 20994373, 21286170, 21286152, 21286163, 21286165, 21286206, 21286308, 21286262, 21286266, 21286358, 21286318, 21286319, 21286436, 21286417, 21286421, 21286466, 21285957, 21285250, 21285224, 21284293, 21284391, 21284377, 21284359, 21284398, 21256434, 21256432, 21256404, 21256401, 21256445, 21256446, 21664079, 21664005, 21276826, 21276823, 21276870, 21276794, 21272841, 21272882, 21272880, 21272893, 21272917, 21273018, 21273042, 21273125, 21273147, 21273116, 21273151, 21273181, 21273186, 21273173, 21270931, 21251227, 21251243, 21251234, 21251320, 21251498, 21251524, 21251571, 21251463, 21251466, 21251478, 21251613, 21251514, 21251665, 21251662, 21251561, 21251710, 21251781, 21250697, 21250691, 21250761, 21250933, 21250851, 21250846, 21250883, 21250767, 21250895, 21250804, 21250925, 21250922, 21250910, 21250885, 21250948, 21250949, 21245662, 21245971, 21245970, 21245967, 21245965, 21245945, 21245955, 21245949, 21245950, 21245446, 21245440, 21245434, 21245435, 21268224, 21268302, 21268299, 21268294, 21268209, 21268213, 21268186, 21268187, 21244960, 21244923, 21244927, 21269366, 21269442, 21269461, 21269477, 21269589, 21269614, 21269685, 21269547, 21269581, 21269419, 21269496, 21269498, 21269592, 21269598, 21269663, 21269626, 21269702, 21269732, 21269470, 21269468, 21269659, 21269654, 21269692, 21269715, 21269717, 21269782, 21269783, 21269815, 21269924, 21269956, 21270059, 21269710, 21269980, 21269898, 21269931, 21270086, 21270096, 21270523, 21270544, 21270537, 21270534, 21270601, 21270570, 21270296, 21270262, 21242059, 21242044, 21241946, 21241947, 21241952, 21241986, 21241988, 21241088, 21241126, 21241170, 21240991, 21241002, 21241004, 21836151, 21835539, 21842485, 21842487, 21842307, 21842504, 21978462, 21979463, 21979459, 21979571, 21979573, 21979705, 21979616, 21980237, 21980246, 21981061, 21407176, 21865686, 21910942, 21910943, 21910948, 21910947, 21910648, 21910755, 21910760, 21910759, 21910764, 21910763, 21910767, 21910771, 21910782, 21910809, 21910813, 21910856, 21910858
Stage
Approved
Contributors
Travis Nauman
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