Cinder cone volcanoes are steep, cone-shaped volcanoes built from lava fragments called 'cinders.' These volcanic cinders, also known as ' scoria ,' are glassy volcanic fragments that explode from the volcano and cool quickly, building up the sides of the cinder cone volcano fairly quickly.
Retired Marine Gen. James Mattis has been chosen to be secretary of defense by President-elect Donald Trump, according to people familiar with the decision. (Jenny Starrs/The Washington Post) By Dan Lamothe By Dan Lamothe December 1, 2016. President-elect Donald Trump said Thursday he has chosen retired Marine Gen. James N. Mattis, who has said that responding to âpolitical Islamâ is the major security issue facing the United States, to be secretary of defense.
The current secretary of defense is Robert Gates. The role of the Secretary of Defense is to be the principal defense policy advisor to the President and is responsible for thâ¦e formulation of general defense policy related to all matters of direct and primary concern to the Department of Defense, and for the execution of approved policy.