Wir freuen uns über jede Rückmeldung. Ihre Botschaft geht vollkommen anonym nur an das Administrator Team. Danke fürs Mitmachen, das zur Verbesserung des Systems oder der Inhalte beitragen kann. ACHTUNG: Wir können an Sie nur eine Antwort senden, wenn Sie ihre Mail Adresse mitschicken, die wir sonst nicht kennen!

unbekannter Gast
Anzeigen

Fringing reefs becoming atolls#

Fringing reefs becoming atolls
Image courtesy of NASA., under PD
This astronaut photo captures the evolutionary process of fringing reefs gradually becoming atolls. As with the Hawaiian Islands, these volcanic hot spot islands become progressively older to the northwest.

As these islands move away from their magma sources they erode and subside. The two large islands, Raiatea and Tahaa, share a single fringing reef. The next island to the northwest, Bora-Bora, consists of a highly eroded volcanic remnant with fringing reef.

The last island, Tupai, signifies the destiny of these islands; the fringing reef has become an atoll with the central island below sea level.