Most gas hydrates form when what occurs? pressure from overlying rock transforms organic matter into liquid form. minerals crystallize from ocean water. bacteria break down organic matter trapped in ocean-floor sediments.

the answer is pressure from overlying rock transforms organic matter into liquid form. when gas molecules are surrounded in a lattice of water molecules at temperatures above 0°c and pressures above one atmosphere, they can form a steady solid. these solids are known as gas hydrates. most gas hydrates are molded from methane (ch4). these hydrate beds leak gases into the water, forming cold leaks on the ocean flooring.