Shield volcano are cave-like volcanic straights formed by the hardening of overlaying lava. These structures help further the propagation of lava, as the walls of the tube insulates the lava within. Lava tubes can account for a large portion of shield volcano activity; for example, an estimated 58% of the lava forming Kīlauea comes from lava tubes. In some shield volcano eruptions, basaltic lava pours out of a long fissure instead of a central vent, and shrouds the countryside with a long band of volcanic material in the form of a broad plateau. Plateaus of this type exist in Iceland, Washington, Oregon,
When It Rains, It Pours (30 Rock) When It Rains, It Pours (30 Rock) "When It Rains, It Pours" is the of the fifth season of the American television comedy series "30 Rock", and the 82nd overall episode of the series. It was written by co-show runner and executive producer Robert Carlock and directed by series producer Don Scardino. "When It Rains, It Pours" originally aired on the National Broadcasting Company (NBC) network in the United States on September 30, 2010. Guest stars in this episode include Joanna Adler, Ben Bailey, Elizabeth Banks, Craig Castaldo, Paul Giamatti, Andrea Mitchell, Chris Parnell, Sherri Shepherd, and Brian Williams. In