Crust (geology) magma ocean and floated to the top; however, it is unlikely that Earth followed a similar pattern, as the Moon was a water-less system and Earth had water. The Martian meteorite ALH84001 might represent primary crust of Mars; however, again, this is debated. Like Earth, Venus lacks primary crust, as the entire planet has been repeatedly resurfaced and modified. Secondary crust is formed by partial melting of silicate materials in the mantle, and so is usually basaltic in composition. This is the most common type of crust in the Solar System. Most of the surfaces of Mercury, Venus, Earth, and
The Core through the crust underwater, leaving them safe on the ocean floor, but power and communications are offline. They believe themselves lost underwater but use the remaining power to activate a weak sonar beacon. The beacon attracts a nearby whale pod, and Finch is able to trace their whale songs to locate the "Virgil". A week after the mission, Finch unleashes the full details of the mission (including those lost) and of DESTINI to the public via the Internet. "The Core" had out-to-sea scenes, starring , with full support of the US Navy. The film garnered mixed reviews. The film received