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 Taroona Shot tower was the first shot tower built in Australia. At the time it was built it was the tallest building in Australia (It is 53 metres tall, and has 300 stairs leading up to the top of the tower).It was the tallest building in Tasmania until recently when it was surpassed by the 63 metre tall ABC Tower in Hobart.uilt in 1870, a Shot tower was a building used to make shot balls or projectiles for firearms. The tower would be designed so that there would be a large basin of water at the bottom of the tower. Lead would be melted and carried up to the top of the tower via a stairway built circling around the tower.