Simplify the following text for a Grade 13 native English-speaking person.
Original: The early discovered carbonate bauxites occur predominantly in Europe and Jamaica above carbonate rocks ( limestone and dolomite ) , where they were formed by lateritic weathering and residual accumulation of intercalated clays or by clay dissolution residues of the limestone .
Simplified: Carbonate bauxites were discovered earlier , and occur mainly in Europe and Jamaica above carbonate rocks such as limestone and dolomite .