S (the synodic period) = 360 / (360/ P - 360/365.256) days. S (the synodic period) = 360 / (360/365.256 - 360/ P) days. A diagram showing the relationship between orbital size and synodic periods. As the planets move around the Sun they change their positions relative to each other.
Some geologists consider that mantle plumes are generated in the lower levels of the asthenosphere by the decay of concentrations of radioactive isotopes. However, many believe that they are generated at much deeper levels in the lower mantle, perhaps even at the boundary of the mantle with the outer core.
What name is given to the area where volcanoes often occur because convection in the earths mantle produces a column of magma rises into the crust?agma in the mantle rises through the crust because pressure is always wanted to be released and when there is a weak spot in the crust magma automatically rushes to the surfa â¦ ce. 2 people found this useful.