LocalitiesLaunceston City
Type AreaStoke Street, Ravenswood
Grid Reference41° 25’ 12.62” S; 147° 10’ 26.37” E; Elevation 82m ASL
Geology Sheet 1:25 000 Prospect (Forsyth and Calver 2005)
Confidence LevelHigh
Land Salinity
high
Salt Export
low
Water Salinity
low

Summary

The Ravenswood Hydrogeological Landscape (HGL) is characterised by a series of north-west south-east trending fault blocks that step down to the south-west, are bounded to the south-west by high level terraces of the North Esk River that are eroded and covered forming colluvial slopes, and are dissected by a series of incised north-east to south west trending streams. The HGL is located east of the North Esk River in eastern Launceston. This is an area of moderate rainfall (680 mm). It is similar in structure and rock type to the Alanvale HGL but extends from the foothills of the dolerite ranges in the east to the eroded terrace slopes adjacent to the North Esk River in the west. There is a relatively thick regolith mantle over the higher ridge forming areas in this landscape, with more eroded sections along streamlines.

Typical lithologies for this HGL are deeply weathered Jurassic dolerite and fractured Jurassic dolerite, with localised dolerite boulder beds in the north east of the HGL and colluvial gravels and sands in the west.

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