Shield Volcanoes. A shield volcano is a type of volcano usually built almost entirely of fluid lava flows. They have very gentle slopes and are very developed horizontally. These are the classical Hawaii examples â steady flow and accummulation of lava leading to the shield-type formation.hield Volcanoes. A shield volcano is a type of volcano usually built almost entirely of fluid lava flows. They have very gentle slopes and are very developed horizontally. These are the classical Hawaii examples â steady flow and accummulation of lava leading to the shield-type formation.
Definition of OVERTURN. 1. : the act of overturning: the state of being overturned. 2. : the sinking of surface water and rise of bottom water in a lake or sea that results from changes in temperature that commonly occur in spring and fall.efinition of OVERTURN. 1. : the act of overturning: the state of being overturned. 2. : the sinking of surface water and rise of bottom water in a lake or sea that results from changes in temperature that commonly occur in spring and fall.
(Åâ²vÉr-turnâ²). tÃ»rn. 1 the act or process of: overturning the'court s overturn of a. ruling. 2 the state of having been. overturned. 3 the periodic mixing or circulation of water in a lake or sea as a result of changing temperature of its. layers. to turn over; capsize. 4. the act of overturning. 5. the state of being overturned. 6. the thorough circulation of water and nutrients brought about in a lake by the action of wind in the spring and fall.