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) Don Scardino. This was Carlock's sixteenth writing credit, and Scardino's twenty-eighth directed episode. "When It Rains, It Pours" originally aired in the United States on September 30, 2010, on NBC as the second episode of the show's fifth season and the 82nd overall episode of the series. This episode of "30 Rock" was filmed on August 30, August 31, September 2, September 5, and September 8, 2010. In August 2010, series creator, executive producer and lead actress Tina Fey revealed to "Entertainment Weekly" correspondent Michael Ausiello that actor Paul Giamatti would guest star in the upcoming season playing a "grouchy"