There are three main types of plate boundary: divergent, convergent and transform. Plates move away from one another at divergent boundaries. This happens at mid-ocean ridges. Plates move towards one another at convergent boundaries; one plate is forced below another in a process called subduction.
The skin of a Concord grape is typically dark blue or purple, and often is covered with a lighter-coloured epicuticular wax bloom that can be rubbed off. It is a slip-skin variety, meaning that the skin is easily separated from the fruit. Concord grapes have large seeds and are highly aromatic.
1 This color is also known as torbie because it is a tabby tortie. 2  A blue patched tabby is a soft color with patches of blue tabby and patches of cream tabby. 3  A tortoiseshell and white or blue-cream and white has only small white areas. 4  The body has mingled colors. 5  A calico has more white.