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.
Synonyms: reverse, invert, transpose. These verbs mean to change to the opposite position, direction, or course. Reverse implies a complete turning about to a contrary position: We reversed the arrangement of the sofa and chairs.