Volcano were proposed for volcano behavior before the modern understanding of the Earth's mantle structure as a semisolid material was developed. For decades after awareness that compression and radioactive materials may be heat sources, their contributions were specifically discounted. Volcanic action was often attributed to chemical reactions and a thin layer of molten rock near the surface. Volcano A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. Earth's volcanoes occur because its crust is broken into 17 major,
When It Rains, It Pours (30 Rock) at the time of the broadcast. The rating/share was the same number as the previous week's season premiere episode, "The Fabian Strategy"; in the week that "When It Rains, It Pours" originally aired, "30 Rock" was the only Thursday program whose ratings did not fall from its season premiere. In February 2011, Robert Carlock won the Writers Guild of America Award for Episodic Comedy for his work in this episode of "30 Rock". Television columnist Alan Sepiwall for HitFix called this the best overall episode since season four's December 2009 episode "Dealbreakers Talk Show #0001". He wrote that the episode