Between the areas of chalk and limestone downland are clay valleys and vales. Carbonation occurs on rocks which contain calcium carbonate, such as limestone and chalk. She likes to draw Sidewalk chalk art. The pelagic carbonates consist of ooze, chalk, and limestone. Often a chalk or gypsum component is present. In fact, metamorphic rocks are completely absent from the Smoky Hill Chalk Member. There is sedimentary rock of carbon and chalk. The town lies on the northern slopes of the Hertfordshire Chalk Downs. Sister stations WRCL and WWBN also regularly chalk up top 10 ratings in Flint. The west of the county lies on more resistant Cretaceous chalk. The bee fauna is particularly rich in species which depend on chalk grassland. Coalville originally began as a settlement known as Chalk Creek. Silesia was also rich in natural resources such as coal, chalk, copper and gold. Lilacs grow most successfully in well-drained soils, particularly those based on chalk. The water is now supplied by three boreholes drilled into the Upper Chalk.