[Cause] Natural color of wood [Solution] No repair is needed - cherish the individuality of your butcher block! [Problem] 
Dark Streaks in Wood
E d g e C r a c k s a n d S p l i t s
W a r p i n g
S t a i n s
G o u g e s , D e n t s
D a r k S t r e a k s i n W o o d
O i l R e s i d u e