1.Principle of original horizontality, principle of superposition, principle of lateral continuity, principle of crosscutting relationship and unconformity.
3.Elevation and latitude crosscut to form mazes of high-altitude grasslands, chilly black-green conifer forests, temperate rhododendron thickets, and subtropical lowland savannas.
5.The fibers of owls and pigeons were organized much like those of mammals: parallel fibers along the pallium were crosscut by perpendicular fibers between layers, forming columns of connection.