Hammond解释说，Isla Nublar不是一个真正的岛屿。相反，这是一个海底的海底，火山岩石从海地板上推动。哈蒙德说，它的火山起源可以在整个岛上看到。许多地方都有蒸汽通风口，地面通常是脚下的热。因此，由于流行的电流，Isla Nublar位于有雾的地区。
(Isla Nublar, Hammond explained, was not a true island. Rather, it was a seamount, a volcanic upthrusting of rock from the ocean floor. Its volcanic origins can be seen all over the island, Hammond said. There are steam vents in many places, and the ground is often hot underfoot. Because of this, and also because of prevailing currents, Isla Nublar lies in a foggy area.)