where does gas naturally occur
U.S. Geological Survey Gas Hydrates Project. Gas hydrate is an ice-like crystalline form of water and low molecular weight gas (e.g., methane, ethane, carbon dioxide).On Earth, gas hydrates occur naturally in some marine sediments and within and beneath permafrost. Gas hydrates have also been inferred on other planets or their moons.ethane molecules can fit within both the small and large sites in the Structure I lattice, and Structure I methane hydrate is indeed the most common type found in nature. Thus, âgas hydrateâ and âmethane hydrateâ are often used interchangeably by researchers.