Demise of reef-flat carbonate accumulation with late Holocene sea-level fall: Evidence from Molokai, Hawaii

Engels, M. S.; Fletcher, C. H.; Field, M.; Conger, C. L.; Bochicchio, C.

Abstract:

Twelve cores from the protected reef-flat of Molokai revealed that carbonate sediment accumulation, ranging from 3 mm year-1 to less than 1 mm year-1, ended on average 2,500 years ago. Modern sediment is present as a mobile surface veneer but is not trapped within the reef framework. This finding is consistent with the arrest of deposition at the end of the mid-Holocene highstand, known locally as the "Kapapa Stand of the Sea," ???2 m above the present datum ca. 3,500 years ago in the main Hawaiian Islands. Subsequent erosion, non-deposition, and/or a lack of rigid binding were probable factors leading to the lack of reef-flat accumulation during the late Holocene sea-level fall. Given anticipated climate changes, increased sedimentation of reef-flat environments is to be expected as a consequence of higher sea level. ?? 2008 Springer-Verlag.

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Article

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70032914

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Engels, M. S.; Fletcher, C. H.; Field, M.; Conger, C. L.; Bochicchio, C.

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996

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English

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Coral Reefs

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Demise of reef-flat carbonate accumulation with late Holocene sea-level fall: Evidence from Molokai, Hawaii; 2008; Article; Journal; Coral Reefs; Engels, M. S.; Fletcher, C. H.; Field, M.; Conger, C. L.; Bochicchio, C.