Geology of solar terrestrial planets is basalt, a denser volcanic rock that is the primary constituent of the ocean floors. Sedimentary rock is formed from the accumulation of sediment that becomes compacted together. Nearly 75% of the continental surfaces are covered by sedimentary rocks, although they form only about 5% of the crust. The third form of rock material found on Earth is metamorphic rock, which is created from the transformation of pre-existing rock types through high pressures, high temperatures, or both. The most abundant silicate minerals on the Earth's surface include quartz, the feldspars, amphibole, mica, pyroxene, and olivine. Common carbonate minerals include calcite
The Lord of the Rings: The Battle for Middle-earth of "The Battle for Middle-earth" sold 230,000 copies and earned $9.4 million by August 2006, after its release in December 2004. It was the country's 89th best-selling computer game during this period. It received a "Gold" sales award from the Entertainment and Leisure Software Publishers Association (ELSPA), indicating sales of at least 200,000 copies in the United Kingdom. The critical response to "The Battle for Middle-earth" was fairly positive. The video game review aggregator GameRankings displays an average critic score of 82.5%, with about two-thirds of the reviews in the 80%s. IGN praised the game for its visual flair and