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.
Top Choices: Popular black granite colors include Absolute Black, Black Galaxy, Black Pearl, Cambrian Black, Impala Black, India Black, and Titanium. You can see samples of some of these popular granite colors at just about any slab yard in your area.