Marlborough Sounds Resource Management Plan 11 Robertson Mamaku, Horopito, Ruru, Moist, Non to Weakly Schistose Ecosystem Very steep to moderately steep schist lumps, with a minor sedimentary contribution to the layering, comprise the hill and mountain building blocks of this land ecosystem. The rock structure is either non or only weakly schistose with colluvium and alluvium merging on the lower slopes and valley floors. Between the broad shoulders of the land lie a series of coastline fans and inlet heads particularly indented. Elevation is fairly high with a moderate rainfall and overall, only a moderate maritime influence. High exposure and infrequent snow fall around the tops. Large forest tracts on mountain flanks. Table 12 Indigenous Vegetation and Landforms - Robertson Ecosystem Landform Components Geology Remnant Native Past and Potential Vegetation Native Vegetation 1. Steep to very steep upper Siliceous, weakly Forest Forest hill and mountain slopes developed Red beech-silver beech- Red beech-silver beech- 600 -1036 m elevation Marlborough Schist kamahi with horopito, kamahi with horopito, mountain fivefinger, soft mountain fivefinger, soft tree fern, broadleaf, and tree fern, broadleaf, and hupiro (stinkwood). hupiro (stinkwood). Silver beech forest with Silver beech forest with southern rata and Halls southern rata and Halls totara. totara. App Two - 58