Submission + - A massive lake of molten carbon the size of Mexico is discovered under the US (dailymail.co.uk)
schwit1 writes: Situated under western US, 217 miles (350km) beneath the Earth's surface. Scientists used world's largest array of seismic sensors to map area. Melting carbon covers an area of 700,000 sq miles (1.8 million sq km). Upper mantle could contain up to 100 trillion metric tonnes of melted carbon. Its discovery challenges what researchers have assumed about how much carbon is trapped inside the planet.