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.
The word Metamorphism comes from the Greek: Meta = change, Morph = form, so. metamorphism means to change form. In geology this refers to the changes in mineral. assemblage and texture that result from subjecting a rock to pressures and temperatures. different from those under which the rock originally formed.