Sandstone is defined as a rock which is composed of sand-sized grains of various minerals mostly of uniform size and often are smooth and rounded. Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar.
The Bronze Age Timeline. Timeline Description: The Bronze Age was a period of time between the Stone Age and the Iron Age when bronze was used widely to make tools, weapons, and other implements. Bronze is made when copper is heated and mixed with tin, creating a stronger metal than copper.
Iron appeared in China toward the end of the period, during the Eastern Zhou dynasty. The earliest Chinese bronzes were made by the method known as piece-mold castingas opposed to the lost-wax method, which was used in all other Bronze Age cultures.