How Golda Meir, Indira Gandhi, and Margaret Thatcher Wrought a New Standard of Leadership. It is surely time to recognize what an immense improvement has been wrought in world standards of governance by the rise of female national leaders.
Shield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield.
Shield volcanoes are typically made of basalt but can be formed by felsic lava as well. Shield volcanoes occur over hot spots in the crust, such as with the Hawaiian shield volcanoes, or over rift zones, such as in the Icelandic shield volcanoes. Shield volcanoes experience almost continuous eruptions that occur over a long period. The most famous of this type of volcano is Mauna Loa, located on the Island of Hawaii. The typical shield volcano has a gentle slope of about two to three degrees, which rises to about 10 degrees at the top of the slope.