 One of the most productive pools of all, the Carneros pool in the Temblor Formation, was not discovered until 1946, but it reached its peak production just one year later, with over produced during that year from that pool alone.Many of the pools, especially in the deeper units, were not found until the 1940s to the 1980s.Some are small and disconnected, trapped by faulting and impermeable units, often at considerable depth; for example, the Phacoides pool in the Temblor Formation is at below ground surface, and the field operators did not find it until 1967.