That means it experiences smaller storm waves in its inner regions, which are narrow and shallow, than in its wider, deeper parts.

ECONOMIST: A tsunami may have struck Britain 400 years ago

As in the Gulf, the oil deposits were created during a period of flourishing plant life 80 million years ago, when rivers draining Africa and South America dumped sediments into the narrow and shallow sea then separating the two continents.

FORBES: Going deep

Will you go wide and shallow (low priced gifts for many people) or narrow and deep (few incredible gifts for a handful of people)?

FORBES: Have Less Holiday Financial Stress