The quarter sliced pattern is first accomplished by cutting the log into four equal "quarters" and then slicing the quarter as shown in the graphic. It results in a fairly straight grain pattern. It should be noted that often times in quarter sliced oak a phenomenon occurs called flake. This is a natural product of the wood and is a function of the way it's sliced in relation to the medullary rays.
Produces a striped grain pattern, straight in some woods, varied in others. Veneer produced by cutting in a radial direction to the pith to the extent that ray flake is produced, and the amount may be unlimited. In some woods, principally oak, "flake" results from cutting through the radial "rays".