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Quamby Bluff
Quamby Bluff is a mountain in Northern Tasmania, Australia that is an outlying part of the Great Western Tiers mountain range. It is 19 km from Deloraine.
==Geography and geology==
Quamby bluff lies 19 km from Deloraine by road, just north of the main escarpment of the Great Western Tiers mountain range.〔 The name Quamby has been variously stated to be derived from Quarmby, the district in Huddersfield Yorkshire, or from a Viking word that means "mill farm", or from local aboriginal words meaning either a "place of rest" or a "good camping place".〔Lloyd, p.5〕
The Tasmanian central plateau was uplifted from the lower Meander Valley, most probably in the Eocene epoch though possibly earlier, forming the escarpment of the Great Western Tiers. The face of the tiers has been eroded and retreated approximately since then, leaving Quamby Bluff as a solitary outlier.〔Fish and Yaxley, pp.12,253〕 The bluff has similar geology to the rest of the range, and a similar form with cliffs, and talus (a mixture of scree and soil) slopes. Due to its prominence and isolation, views from the top cover a large portion of Northern Tasmania.〔Forestry Commission of Tasmania, p.9〕 In the right conditions Mount Strzelecki on Flinders Island, approximately distant, can be seen from the peak.〔 It's largely flat peak is above sea level.〔Forestry Commission of Tasmania, p.19〕 The mountain's sandstone and mudstone base is of Triassic original and lies in near horizontal strata. Dolerite rocks formed during the Jurassic period intrude through this base. Erosion has formed the dolerite into steep cliffs and scree slopes which dominate the top of the mountain.〔Forestry Commission of Tasmania, p.11〕 The bluff has outcrops of Proterozoic era rocks that are the amongst the oldest found in Tasmania. These rocks are regarded as metamorphosed sediments containing a laminate of graphite, mica quartz-sericite and sericite schists.〔Reid, p.16〕
The area around the mountain has an annual average rainfall of with a predominance in winter〔Lloyd, p.11〕 The rainfall increases significantly with altitude, approximately measured at rising to at the summit. Snow is seen above at any time of year,〔Lloyd, p.7〕 and there is regular snowfall on top of the bluff. Due to its exposed position the summit often experiences severe weather conditions.〔Lloyd, p.12〕
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