At Marwood, we offer varying lengths of Walnut and also offer slabs specifically featuring Walnut Crotch/Feather Grain. The crotch is a portion of the wooden slab where patterns are left from two branches that have met and give the wood a feather pattern. How does crotch form? When branches meet and form a “Y” shape, the tree is limited on its space to grow. With each year that a new ring is formed around the tree trunk, wood pushes into wood and the grain starts to fold into itself. This forms the beautiful crotch patterns you can see in the pictures below.