Ecological site group DX035X04AESG07
San Juan River Corridor LRU Subset - Clayey Subgroup
Last updated: 11/01/2022
Accessed: 05/02/2024
Ecological site group description
Key Characteristics
- San Juan River Corridor. This LRU subset consists of landforms which drain directly into the San Juan River. Elevations are mostly under 1900 meters. Stratigraphy is varied, ranging from the Mancos to the Nacimiento formations. This LRU subset is distinct from the rest of 35.4 in that it provides irrigation water. Thus, upland landforms which contribute significant water are included.
- Sites that occur on "upland", water-shedding landforms. Elevated terraces are included in this group.
- Soils are > 50 cm to lithic or paralithic contact (root-restrictive bedrock).
- Soils lack both significant salinity and sodicity.
- Soils lack one or both f the following at the surface: Strong or violent response to dilute HCl or ≥ 5% calcareous fragments.
- Sites with soils that have particle size classes of fine or very fine.
Provisional. A provisional ecological site description has undergone quality control and quality assurance review. It contains a working state and transition model and enough information to identify the ecological site.
Physiography
This site occupies various water-shedding landforms, including elevated terraces and alluvial fans. Water-collecting landforms such as floodplains and drainageways are excluded from the Clayey concept.
Soil features
Soils have particle size classes of clayey, fine, or very fine.
Soils do not contain a combination of calcareous fragments and free carbonates at the surface, and lack significant salinity and/or sodicity.
Major Land Resource Area
MLRA 035X
Colorado Plateau
Correlated Map Unit Components
23435749, 23435810, 23435827, 23435831, 23435860, 23435873, 23435971, 23435972, 23435975, 23435976, 23435979, 23435985, 23435996, 22999955
Stage
Provisional
Contributors
Curtis Talbot
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