We have done several presentations with schools while back in Canada. Some of the questions have been on atolls. So ... Victoria and I put together a slideshow on atoll lifecycles using Google Earth based on places we visited last year. We are visiting a niece's grade six class tomorrow and Victoria will include the following slides:
Fatu Hiva: No fringing reef yet
Mo'orea: fringing reef started. Limited lagoon
Bora Bora: Full fringing reef and the mountain has began to subside.