Oil is continuously generated, but the geological structures that trap and concentrate it are mostly formed when continents join and inland seas dry up, which doesn't happen very often. However, oil sources such as those that cause oil seeps are not necessarily ancient.
Oil is continuously generated, but the geological structures that trap and concentrate it are mostly formed when continents join and inland seas dry up, which doesn't happen very often. However, oil sources such as those that cause oil seeps are not necessarily ancient.