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13i <br />• <br />Characteristics of the Rubble land <br />Rubble land consists of large exposures of loose rocks such as <br />talus, scree, or rock glaciers derived dominantly from <br />rhyolite, andesite, breccia, or basalt. <br />Composition <br />Cryochrepts <br />Cryoborolls <br />Rubble land: <br />Contrasting <br />soil and similar <br />soil and similar <br />25 percent <br />soils: 35 percent <br />soils: 30 percent <br />inclusions: 10 percent <br />Contrasting Inclusions <br />Five percent soils with less than 35 percent rock fragments in <br />the particle size control section <br />Five percent rock outcrop <br />Major Uses <br />Wildlife, recreation <br />Major Management Factors <br />• <br />Recreation <br />Cryochrepts and Cryoborolls <br />Soil-related factors: steep slopes in some areas, high soil <br />erosion hazard in the steeper areas, subsurface rock <br />fragments, moderate mass movement potential <br />Management considerations: <br />The steepness of slope limit the uses of this unit to wildlife <br />habitat, limited recreation, watershed, and scenic beauty. <br />Any construction activity on this unit may trigger mass <br />movement. <br />Steep slopes limit the use of this unit to a few paths and <br />trails, which should extend across the slope. <br />Interpretive Groups <br />Land capability classification: VIII <br />Cryochrepts and Cryoborolls <br />Plant Association: Abies lasiocarpa-Picea engelmannii/Paxistima <br />myrsinites/Pseudotsuga menziesii, #00313-1 <br />• <br />