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Great Western Tiers
Mountain range in Tasmania, Australia
Mountain range in Tasmania, Australia
| Field | Value |
|---|---|
| name | Great Western Tiers |
| other_name | Kooparoona Niara |
| photo | Drys Bluff from the main road.JPG |
| photo_size | 280 |
| photo_caption | Drys Bluff, part of the Great Western Tiers |
| country_type | |
| country | Australia |
| subdivision1_type | State |
| subdivision1 | Tasmania |
| subdivision3 | Central Highlands |
| highest | Ironstone Mountain |
| elevation_m | 1444 |
| elevation_system | |
| elevation_ref | |
| coordinates | |
| coordinates_ref | |
| length_km | 100 |
| length_orientation | NE/SW |
| range_coordinates | |
| range_coordinates_ref | |
| geology | Dolerite |
| age | Jurassic |
| map | Australia Tasmania |
| map_caption | Location in Tasmania |
| map_relief | 1 |
The Great Western Tiers (Palawa kani: Kooparoona Niara) are a collection of mountain bluffs that form the northern edge of the Central Highlands plateau in Tasmania, Australia. The bluffs are contained within the Tasmanian Wilderness World Heritage Site.
The bluffs stretch northwest to southeast over 100 km from the 1420 m Western Bluff near the town of Mole Creek to the 1210 m Millers Bluff, approximately 25 km west of Campbell Town. During the late 19th century the Tiers were known as the Great Western Range.
Features
The Central Highlands, or Tasmanian central plateau, was uplifted from the lower Meander Valley, most probably in the Eocene epoch though possibly earlier, forming the Tiers' escarpment. The plateau's north-east boundary, which ranges from 760 m–1500 m, originated in extensive Tertiary faulting.
This escarpment divides the high, rocky, sparsely inhabited central plateau from the fertile lower land of the Meander Valley and the northern midlands. The edge of the tiers have prominent cliffs and columns of Jurassic dolerite. The highest peak in the tiers is the 1444 m Ironstone Mountain. The dolerite is so prominent as the older rocks that overlay them are softer and have been eroded away. In places dolerite columns have collapsed into scree slopes.
The face of the tiers has been eroded and retreated approximately 4 mi since their formation, leaving the mountain Quamby Bluff as a solitary outlier. The central plateau's landform has been changed by glaciation. Valleys under the tiers are filled with talus, mostly bounders with a 25% mix of soil formed from boulder weathering.
Peaks
The peaks and bluffs of the Great Western Tiers include:
- Brady's lookout, at 1371 m. Named after the bushranger Matthew Brady.
- Billop Bluff
- Dry's Bluff at 1298 m. Origin of the Liffey River.
- Ironstone Mountain, at 1444 m
- Millers Bluff, at 1210 m
- Mother Cummings Peak, at 1255 m
- Mount Blackwood
- Mount Parmeener
- Neals Bluff
- Panorama Hill
- Projection Bluff
- Quamby Bluff, at 1227 m
- Western Bluff, at 1420 m
Gallery
References
Bibliography
References
- (3 June 2022). "On Mole Creek & Kooparoona Niara National Parks …". Tasmanian Times.
- "Ironstone Mountain, Australia".
- {{Gazetteer of Australia
- {{Gazetteer of Australia
- Lloyd, p.1
- Whitworth, p.91
- Fish and Yaxley, p.253
- Fish and Yaxley, p.293
- Unlike most of the bluffs this mountain is not visible from the Meander Valley, but is south of the escarpment. The escarpment has a distinct concave profile. Cliffs and scree slopes are common features.Fish and Yaxley, p.294
- Lloyd, p.5
- Fish and Yaxley, p.12
- Whitworth, p.22
- Whitworth, p.61
- Whitworth, p.135
- "Cummings Head, Australia".
- Forestry Commission of Tasmania, p.9
This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.
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