Buchanan, who is buried in Lancaster, has regularly been ranked one of the worst presidents by historians, citing his ambivalence towards the South wanting to secede from the Union prior to the Civil War.
A shield volcano is a type of volcano usually built almost entirely of fluid magma flows. They are named for their large size and low profile, resembling a warrior's shield lying on the ground.
www.physorg.com/news69513298.html. Shield Volcanoes are made mostly of fluid lava flows. Flow after flow pours from a central summit vent. It is the calmest of the eruption types, characterized by the effusive emission of highly fluid lavas with low gas contents. It builds up and turns into what looks like a shield.