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Chaotic deposition by a giant wave, Molokai, Hawaii

January 1, 1994

A coral-basalt breccia-conglomerate is exposed >60m above present sea level and nearly 2km inland from the present shoreline on the southwest side of East Molokai Volcano. This deposits was apparently laid down by a giant wave that broke over an outer reef, similar to the present fringing reef, and advanced as a turbulent bore over the back-reef flat, picking up a slurry of carbonate-rich debris and depositing it on the slopes inland as the wave advanced. U-series dating of coral fragments indicates that the age of this deposit is 240-200 ka. This giant wave was most likley caused by one of the many large submarine landslides that have been identified on the lower slopes of the major Hawaiian Islands. 

Citation Information

Publication Year 1994
Title Chaotic deposition by a giant wave, Molokai, Hawaii
DOI 10.1130/0016-7606(1994)106<0962:CDBAGW>2.3.CO;2
Authors J. G. Moore, W.B. Bryan, K. R. Ludwig
Publication Type Article
Publication Subtype Journal Article
Series Title Geological Society of America Bulletin
Index ID 70017184
Record Source USGS Publications Warehouse
USGS Organization Volcano Hazards Program