  Although the terms ocean and sea are often used interchangeably, a sea is generally considered to be smaller than an ocean. One definition of ocean is: a great bod â¦ y of interconnecting salt water that covers 71 percent of the Earth's surface.
Sharpie brand permanent markers. A permanent marker or indelible marker is a type of marker pen that is used to create permanent writing on an object. In general, the ink comprises a main carrier solvent, a glyceride, a pyrrolidone, a resin and a colorant, making it waterproof.
Therefore, it has become. standard practice for a physician to place a breast tissue marker at the site of the. biopsy for future reference. Marking the site also helps to ensure that the correct. area was biopsied. The markers are made of materials that will show up on your follow-up. mammogram.