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.
The first bronzes appear in Britain in the centuries just before 2500 BC, which is the usually accepted start date for the Bronze Age. On the European mainland the arrival of bronze was preceded by copper tools of the Chalcolithic or Copper Age, but in Britain tin and copper appear at about the same time as bronze.