Brittle deformation of rock bodies is characterized by slow internal flow of the rock material. true false

False. Brittle deformation happens when there is a continuous force applied to a rock. As the force is gradually increased, little change occurs in the rock until suddenly it fractures.
The rocks that undergo brittle deformation tend to fracture into joints and faults.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey