Metamorphic rocks have been modified by heat, pressure and chemical processes, usually while buried deep below Earth's surface. Exposure to these extreme conditions has altered the mineralogy, texture and chemical composition of the rocks. There are two basic types of metamorphic rocks.Foliated metamorphic rocks such as gneiss, phyllite, schist, and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure.uartzite is a non-foliated metamorphic rock that is produced by the metamorphism of sandstone. It is composed primarily of quartz. The specimen above is about two inches (five centimeters) across.
Sydney Tower. Sydney Tower is Sydney's tallest structure and the second tallest observation tower in the Southern Hemisphere. Auckland's Sky Tower is taller but Sydney Tower's main observation deck is almost 50 m (164 ft) higher than the observation deck on Auckland's Sky Tower.
The Shot Tower is situated beside Channel Highway in Taroona and is about 11 km drive from Hobart. It was completed in 1870 and at 58 metres tall, was Australia's tallest building for four years.o other Tasmanian buildings as yet exceed the Shot Tower's height, although NAB house in Collins St Hobart equals it at 58 metres tall. Parks and Wildlife Service pages give a full description of the building and operation of the Shot Tower, includinghow shot was manufactured, and of Joseph Moir's life.