The boundary, where those rock layers were not reshaped by the collision, is the western edge of the Valley and Ridge physiographic province and the eastern edge of the Apppalachian Plateau. West of the Shenandoah Valley, the Valley and Ridge province extends into West Virginia.
Yowie is one of several names given to a hominid reputed to live in the Australian wilderness. The creature has its roots in Aboriginal oral history.
but yo-yo it's also a toy (I think in English it's called the same) so, someone that is a yo-yo can mean that it is a person that can be easily manipulated like a yo-yo or a person that changes humor or personality or ideas, very frequently. Also can be referd as a person, that comes and goes, easily (like in and out of relationships)