Coral Reefs; Volcanic Islands; South American Geology — CompleteNote 30 — Chapter VI · ON THE DISTRIBUTION OF CORAL-REEFS WITH REFERENCE TO THE THEORY OF THEIR FORMATIONReading editionRüppell, “Reise in Abyssinien,” Band i., s. 141.◇Copy noteReturn to Chapter VI ON THE DISTRIBUTION OF CORAL-REEFS WITH REFERENCE TO THE THEORY OF THEIR FORMATION