B 3.21 Low hilss and Hills, Volcanics, Type 1

These units are based on the Snowy River Volcanics geological formation which have a number of lithologies but are predominantly made up of acidic volcanics; mainly rhyodacite. This group of units comprises a large proportion of the Rodger River basin extending north of Yalmy Road from Sugarloaf Hill in the south to north of Monkey Top track. These units generally have a moist climate (> 1000 mm per annum). The soils are red and brown friable soils with gradational profiles and greater accumulation on some lower slopes. There are some multi-layered soils associated with major drainage lines (Waratah Flat). The native vegetation is predominantly Wet Sclerophyll Forest with Riparian Forest and some Dry Sclerophyll Forest and Cool Temperate Rainforest. Geology: Dls; Devonian acid volcanics (Snowy River Volcanics). Rhyodacite, tuff, andesite, minor rhyolite and basalt. Also includes coarse sandstone, conglomerate and minor siltstone. Rainfall: 700- greater than 1200 mm per annum, generally greater than 1000 mm per annum. Slope: 1-56%, generally 3-32% Dominant landform element: Broad slopes, crests Minor landform element: Drainage depression

Soils: Dominant: Gn4.11, Gn3.11, Gn3.71, Gn4.31. Friable, often gritty throughout, red and brown gradational profiles with organic rich loam/clay A (surface) horizons over light clay B horizons. Moderately well to strongly fine structured profiles and less coarse structure compared with sedimentary gradational profiles.

Minor: Dy3.11 Lighter A horizon below some organic accumulation clearly overlying an occasionally mottled, strongly structured yellow clayey B horizon. This is associated with lower slopes associated with a major drainage line (alluvial/colluvial) and depositional Uniform coarse(Uc) loamy sand profiles i.e. Waratah Flat.

Native vegetation: Predominantly Wet Sclerophyll Forest with some Riparian Forest; Messmate, Mountain Grey Gum, Blackwood and Blanket-leaf. Also Shining Gum, River Peppermint and White Stringybark, Silver Wattle, Southern Sassafras (Atherosperma moschatum), Soft Tree-Fern.

Stone/rock outcrop: Nil to minor. Some stone associated with steeper slopes, crests.

Pans: Nil or not observed

Observed land deterioration: Very minor sheet and rill erosion.

Susceptibility to land deterioration: Sheet and rill erosion (low to moderately high); Gully erosion (low to moderately high); Compaction (moderately low to very high); Mass movement (low to moderate); Inundation/Waterlogging (very low to high).

Sites with laboratory data: Nil