Coal in Australia. Right now, coal is Australiaâs primary fuel source for generating electricity at around 73 percent. Black coal is found across Australia. Brown coal, sometimes called lignite, is a relatively soft material, which has a heating value of about one-quarter of black coal.
noun. The definition of abrasive is something that is harsh or rough, often to an unpleasant degree. An example of abrasive is the attitude of your boss who is always short tempered and yelling at you. Sand paper or SOS pads are examples of abrasives.
Plucking and Abrasion Defined. Plucking involves movement of large chunks of rock; abrasion is the sandpaper-like effect of rocky debris scouring land. Both are mainly attributed to the movement of glaciers, which the U.S. National Park Service refers to as nature's landscape architects..