Melbourne property prices have passed Sydney as the nation's fastest growing, although they still lagged well behind in terms of absolute cost. Melbourne's year-on-year dwelling price growth of 11 per cent is the nation's fastest. Sydney's annual property price growth of 10.5 per cent is the slowest in 29 months. Less than half the properties auctioned in Sydney over the weekend sold.
How Is Chalk Formed. Chalk is a soft, white, porous sedimentary rock, a form of limestone composed of the mineral calcite. It forms under relatively deep marine conditions from the gradual accumulation of minute calcite plates (coccoliths) shed from micro-organisms called coccolithophores. It is common to find flint and chert nodules embedded in chalk.
Clastic or detrital sedimentary rocks are made of sediments that are the result of weathering and transport. Chemical rocks are created from chemical precipitation. Biochemical or organic rocks are made up biological remains. sedimentary structure is a structural feature in a sedimentary rock formed as a result of weathering or transportation. Types of sedimentary structures include: stratification, cross bedding, graded bedding, ripple marks, oscillation marks, mud cracks, raindrops, and trace fossils.