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Mount Leura
Mount Leura is a 313-metre scoria cone surrounding a dry crater 100 m deep and is the central and most obvious component of a larger volcanic complex southeast of the town of Camperdown located in western Victoria, Australia, 194 kilometres (121 mi) km south west of the state capital, Melbourne. The inactive volcano is thought to have last erupted between 5,000 and 20,000 years ago. The name means "big nose" in local aboriginal dialect.
==Leura Maar==
Mount Leura, together with nearby Mount Sugarloaf, forms part of a large extinct volcanic complex known as the "Leura Maar".〔(Volcanic landforms in the Camperdown area of Victoria )〕 The complex includes a broad shallow maar crater measuring 2.5 km by 1.7 km surrounded by a low tuff ring, inside which are the secondary eruption points of Mount Leura and several smaller unnamed mounds and cones of scoria. These may represent eruptions along a north-south fissure. The walls of the cone are alternating layers of tuff and scoria with numerous blocks and volcanic bombs. Mount Sugarloaf is a perfect conical mound on the southwestern flank of Mount Leura and represents a final stage of activity of the Leura volcano, when a small vent ejected a large volume of lava fragments in a short time, without a change in the direction of the eruption column. This produced a steep, symmetrical, conical mound of volcanic ash, scoria and larger blocks and bombs.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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