  The structure of $^{70}$Ge has been studied through in-beam gamma ray
spectroscopy. A new band structure is identified that leads to forking of the
ground-state band into two excited bands. Band structures have been
investigated using the microscopic triaxial projected shell model approach. The
observed forking is demonstrated to result from almost simultaneous band
crossing of the two neutron aligned and the \gamma-band built on this
two-quasiparticle configuration with the ground-state band.
