Answer: Heidi Doody. Heidi Doody was built by Margo Rose and had the voice of Norma MacMillan and Donna Miller. Heidi was introduced as a stranger who saved Buffalo Bob's life in Africa. Later, Heidi was adopted and became Howdy's sister.
The descending of rock layers at subduction zones causes metamorphism in two ways; the shearing effect of the plates sliding past each other causes the rocks coming in contact with the descending rocks to change. Some of the descending rock will melt because of this friction.
Types of metamorphism. Depends what causes change in T and P. Regional metamorphism The most widespread-affects huge volumes of rock. Caused by lithospheric movements, therefore nearly always accompanied by deformation of the rocks as well as mineralogical change. Contact (thermal) metamorphism Heat is from contact with magma.