Igneous rock the partial melting of rocks within the mantle and crust. Extrusive igneous rocks cool and solidify quicker than intrusive igneous rocks. They are formed by the cooling of molten magma on the earth's surface. The magma, which is brought to the surface through fissures or volcanic eruptions, solidifies at a faster rate. Hence such rocks are smooth, crystalline and fine-grained. Basalt is a common extrusive igneous rock and forms lava flows, lava sheets and lava plateaus. Some kinds of basalt solidify to form long polygonal columns. The Giant's Causeway in Antrim, Northern Ireland is an example. The molten rock, with
Secret of the Cave raw footage was shot. The cave, a central part of the film, was not discovered until 2 or 3 days before the scheduled shoot. It was discovered by a crew member, walking during a break. Secret of the Cave Secret of the Cave is a 2006 student film by the School of Visual Art and Design at Southern Adventist University. The film is an adaptation of the 1920 children's story of the same name by Arthur S. Maxwell (also known as "Uncle Arthur"). It was released on DVD in September 2007 and is distributed by First Look Studios in conjunction