Morocco is, geologically, a very complicated area. It records the
marine environment of north Africa over 500 million years. This area is
noted for its shops and export of fossils to many parts of the world.
In some areas you have typical marine Paleozoic fauna including brachiopod,
trilobites, ammonites, crinoids, and sea urchins.
The Mesozoic is noted for its extremely large ammonites that are found
in fossil shops throughout the world. The Cenozoic is full of fossil
shark teeth, which reflects a biologically happy area for a long time.
Now the area is part of the Sahara Desert, with little sign of its
glorious past, except in the fossils.