In some situations, both plates can include continental material such as where the Indo-Australia plate is subducting beneath the Eurasian plate. Volcanic island arcs are created by volcanic activity associated with the subduction of the oceanic plate.n some situations, both plates can include continental material such as where the Indo-Australia plate is subducting beneath the Eurasian plate. Volcanic island arcs are created by volcanic activity associated with the subduction of the oceanic plate.
The Hyksos brought with them knowledge of bronze weapons, chariots and composite bows. But it is not clear that they were required to use this military know-how to take control of upper Egypt.
The Romans continuously improved upon the torsion weapons that had first appeared in 4th century BCE Greece. The two main types were the katapeltÄs oxybelÄs which fired bolts and the lithobolos which fired stones, both over distances of over 300 metres (as demonstrated in modern full-size reproductions).