Guiana Shield Guiana Shield The Guiana Shield is one of the three cratons of the South American Plate. It is a 1.7 billion-year-old Precambrian geological formation in northeast South America that forms a portion of the northern coast. The higher elevations on the shield are called the Guiana Highlands, which is where the table-like mountains called tepuis are found. The Guiana Highlands are also the source of some of the world's most spectacular waterfalls such as Angel Falls, Kaieteur Falls and Kuquenan Falls. The Guiana Shield underlies Guyana (previously British Guiana), Suriname (previously Dutch Guiana) and French Guiana (or Guyane), most of
Now What? (House) week behind the fourth season premiere of "The Big Bang Theory," which was watched by 3.11 million viewers. "Now What?" debuted new opening credits. The following full-time cast members are retained: Jennifer Morrison no longer appears, as she was written out of the show during season six. Now What? (House) "Now What?" is the first episode of the seventh season of the American medical drama series "House". It first aired on September 20, 2010, on Fox. In the aftermath of last season's finale in which House and Cuddy admitted they had feelings for each other, the seventh season opener finds