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.
Another geological feature that results from a subduction zone is volcanoes. When the plate being forced downward begins to melt, this magma rises to the surface, forming volcanoes. Mount Saint Helens is an example of a volcano formed by an oceanic plate that is subducting under the North American continental plate.