@article {1998, title = {Age and origin of Late Quaternary eolianite, Kaiehu Point (Moomomi), Molokai, Hawaii}, journal = {Journal of Coastal Research}, volume = {SI}, year = {2005}, note = {Sp. Iss. 42947fu Times Cited:3 Cited References Count:50 }, month = {Spr}, pages = {97-112}, abstract = {A well-preserved, vertically stacked succession of two genetically distinct eolianites and associated caliche paleosol units, capped by modern and Holocene coastal dunes, occurs at Kaiehu Point, west Molokai, Hawaii. The Pleistocene eolianite facies comprise well-cemented, medium grained skeletal carbonate sand and their morphostratigraphic context implies formation at times of lower than present sea level. Amino acid racernization (AAR) evidence suggests eolianite formation late in marine Oxygen Isotope Stage (OIS) 5, but lacks the precision to uniquely define in which isotopic substage the deposits formed. Coupled with the AAR results, the morphostratigraphic evidence, would suggest that the Lower Eolianite formed in OIS 5c and the Middle Eolianite during 5a with their superposed caliche paleosols having formed in subsequent stadial stages. The unconsolidated coastal sand dunes of Holocene age contain reworked Late Pleistocene skeletal carbonate sand based on AAR evidence. The most likely source of the reworked carbonate is from the erosion of the eolianites at Kaiehu Point. The Pleistocene eolianite-caliche paleosol sediments reveal variable Mg-content, stable isotope ratios and petrological characteristics consistent with changing degrees of weathering intensity and meteoric diagenesis. These changes are attributed to orographic effects resulting from relative sea-level changes. Accordingly, a two-phase model is favored for the formation of the eolianite-paleosol successions at Kaiehu Point, west Molokai. Eolianite sedimentation is initiated at times of marginally lower sea levels promoting the landward migration of bioclastic sand to form extensive eolian sandsheets. This is followed by a more pronounced phase of pedogenesis associated with a further fall in sea level and concomitant increased rainfall due to enhanced orographic effects.}, keywords = {Amino acid racemization, aminostratigraphy, bermuda, carbonate lithofacies, cementation, cliche paleosols, eolianite, hawaii, island, Late Quaternary, limestone petrology, Marine, molokai, oahu, precipitation, sea level, sea-level, south-australia, Stable isotopes, stratigraphy}, isbn = {0749-0208}, author = {Fletcher, C. H. and Murray-Wallace, C. V. and Glenn, C. R. and Sherman, C. E. and Popp, B. and Hessler, A.} } @article {410, title = {A Budget of Carbonate and Terrigenous Sediments, Hanalei Bay, Kauai, Hawaiian Islands}, journal = {Marine Geology}, year = {2002}, note = {id: 105}, abstract = {The sediment budget of Hanalei Bay on the north shore of Kauai was calculated using sedimentological and geophysical methods. The calculations of the budget subsequently allowed an interpretation of the Holocene history of the bay. The bay sediments are easily separated into marine (carbonate) and terrigenous (siliciclastic) grains. Surficial sediments are dominated by carbonate grains (\~{}70\%) of coralline algae, coral, and mollusc fragments as well as foraminifera, Halimeda, bryozoa, and echinoderm tests. However, siliciclastic grains (e.g. olivine, plagioclase, volcanic lithics) from the Hanalei River watershed draining shield volcanic highlands are the most common individual grain type (\~{}27\%) and form a zone of high concentration from the mouth of the Hanalei River into the center of the bay. Flooding in the bay by the post-glacial sea-level rise began soon after 11.7 kyears. The resulting marine environment caused the net deposition of 45.5{\textpm}1.5{\texttimes}106 m3 of sediment in the bay and approximately 33.7{\textpm}11.2{\texttimes}106 m3 of sediment on the Hanalei coastal plain. The total volume of carbonate sediment stored in the bay and coastal plain is greater than the volume likely to have been produced exclusively within the bay during the same time. Calculations indicate that approximately 2490 m3 year-1 have been imported into the bay or coastal plain and deposited since 11,700 years ago. The majority of this sediment influx is likely delivered from the east by the strong tradewind-driven littoral currents that characterize Kauai{\textquoteright}s north shore. Net carbonate sediment deposition in Hanalei Bay peaked at a rate of 15,500 m3 year-1 between 5000 and 3000 years ago (when sea level may have been 2 m above present) diminishing to 3890 m3 year-1 from 1000 years ago to the present. This influx is likely to have played a significant role in the mid to late Holocene progradation of the Hanalei shoreline.}, doi = {10.1016/S0037-0738(01)00268-8}, author = {Calhoun, R. S. and Fletcher, C. H. and Harney, J. N.} } @article {864, title = {Age and composition of carbonate shoreface sediments, Kailua Bay, Oahu, Hawaii}, journal = {Coral Reefs}, volume = {19}, year = {2000}, note = {341wmTimes Cited:32Cited References Count:43}, month = {Jul}, pages = {141-154}, abstract = {The origin, age, and dynamics of carbonate sediments in Kailua Bay on Oahu, Hawaii, are described. The shoreface (from shoreline to 4 km offshore) consists of a broad (5 km(2)) fringing coral reef ecosystem bisected by a sinuous, shore-normal, sand-filled paleostream channel 200-300 m wide. The median grain diameter of surface sands is finest on the beach face (<0.3 mm) and increases offshore along the channel axis. Kailua sands are >90\% biogenic carbonate, dominated by skeletal fragments of coralline algae (e.g. Porolithon, up to 50\%) followed by the calcareous green alga Halimeda (up to 32\%), coral fragments (1-24\%), mollusc fragments (6-21\%), and benthic foraminifera (1-10\%). Sand composition and age across the shoreface are correlated to carbonate production. Corals and coralline algae, principal builders of the reef framework, are younger and more abundant in sands along the channel axis and in offshore reefal areas, while Halimeda, molluscs, and foraminifera are younger and more dominant in nearshore waters shoreward of the main region of framework building. Shoreface sediments are relatively old. Of 20 calibrated radiocarbon dates on skeletal constituents of sand, only three are younger than 500 years B.P.; six are 500-1000 years B.P.; six are 1000-2000 years B.P.; and five are 2000-5000 years B.P. Dated fine sands are older than medium to coarse sands and hence may constitute a reservoir of fossil carbonate that is distributed over the entire shoreface. Dominance of fossiliferous sand indicates long storage times for carbonate grains, which tend to decrease in size with age, such that the entire period of relative sea-level inundation (similar to 5000 years) is represented in the sediment. Despite an apparently healthy modern coral ecosystem, the surficial sand pool of Kailua Bay is dominated by sand reflecting an antecedent system, possibly one that existed under a + 1-2 m sea-level high stand during the mid- to late Holocene.}, issn = {0722-4028}, doi = {10.1007/s003380000085}, author = {Harney, J. N. and Grossman, E. E. and Richmond, B. M. and Fletcher, C. H.} } @inbook {1456, title = {Coupled inner shelf--shoreline sediment responses to small-scale Holocene sea-level fluctuations; North Carolina coastal zone}, booktitle = {The non-steady state of the inner shelf and shoreline: coastal change on the time scale of decades to millennia in the late Quaternary}, year = {1999}, note = {id: 1393}, month = {1999}, pages = {165-167}, publisher = {University of Hawaii, Honolulu}, organization = {University of Hawaii, Honolulu}, author = {Riggs, S. R.}, editor = {Fletcher, C. H.} } @article {2213, title = {Marine and meteoric diagenesis of pleistocene carbonates from a nearshore submarine terrace, Ohau, Hawaii}, journal = {Journal of Sedimentary Research}, volume = {69}, year = {1999}, note = {id: 298}, month = {1999}, pages = {1083-1097}, author = {Sherman, C. E. and Fletcher, C. H. and Rubin, K. H.} } @article {2214, title = {Marine and meteoric diagenesis of Pleistocene carbonates from a nearshore submarine terrace, Oahu, Hawaii}, journal = {Journal of Sedimentary Research}, volume = {69}, year = {1999}, note = {A237cq Times Cited:42 Cited References Count:79 }, month = {Sep}, pages = {1083-1097}, abstract = {The nearshore slope of Oahu consists of a shallowly dipping shelf extending from the shoreline out to the similar to -20 m contour, where there is a sharp break in slope down to similar to -30 m, Limestones recovered in a series of short cores taken from this nearshore terrace are typical of shallow-marine reef environments and comprise either a branching-coral or massive-coral facies, The composition as well as shoreward zonation of facies suggests that the terrace represents an in situ fossil reef complex. Th-U ages of in situ corals are all Pleistocene and suggest that the bulk of the feature formed during marine oxygen isotope stage 7. Later accretion along the seaward front of the terrace occurred during marine oxygen isotope substages 5a and/or 5c. Deposition during these interglacial highstands has not previously been documented in the sea-level record on Oahu,Although the diagenetic record in the cored samples is incomplete, three periods of diagenesis are identified: early shallow marine, meteoric, and post-meteoric shallow marine. Early shallow-marine diagenesis includes cementation by aragonite and Mg calcite in an active marine phreatic zone and predominantly micritization in a stagnant marine phreatic zone. Meteoric processes occurred in the vadose zone and include precipitation of calcite (needle fibers, meniscus cements, micritic networks), neomorphism, and dissolution. All limestones are now in an active marine phreatic zone. Evidence of post-meteoric shallow-marine diagenesis is found in last-generation Mg calcite cements and internal sediments occurring directly on limestone substrates that have otherwise been stabilized to calcite. The present seafloor is undergoing extensive biological and physical erosion. No Holocene limestones were recovered. Petrographic and geochemical signatures of subaerial exposure and meteoric diagenesis are recognized within the upper several centimeters of all cores. Thus, the present seafloor in the study area is a flooded Pleistocene subaerial exposure surface. }, keywords = {barrier-reef, calcite, corals, fringing-reef, Holocene, oxygen isotopes, platform, recrystallization, sea-level, stabilization}, isbn = {1073-130x}, doi = {10.2110/jsr.69.1083}, author = {Sherman, C. E. and Fletcher, C. H. and Rubin, K. H.} } @article {806, title = {Measured and predicted sediment yield from a subtropical, heavy rainfall, steep-sided river basin: Hanalei, Kauai, Hawaiian Islands}, journal = {Geomorphology}, volume = {30}, year = {1999}, note = {267flTimes Cited:14Cited References Count:37}, month = {Nov}, pages = {213-226}, abstract = {To determine the sediment yield of the 54.4 km(2) Hanalei River basin, we employ three methods: (1) the Universal Soil Loss Equation (USLE), which uses natural characteristics of the basin such as the amount of rain, slope steepness and length values, and soil types to predict sediment erosion in a basin; (2) the thickness and calibrated radiocarbon age of fluvial deposits cored from the coastal plain; and (3) field measurements of suspended sediment in the river. Method 1 (USLE) provides a model prediction of sediment yield that we test with observational data of methods 2 and 3. Several curves, including one by the US Soil Conservation Service, predict a sediment delivery ratio (measured sediment yield: gross erosion) between approximately 15\% and 50\%. With 5260 +/- 2210 Mg (metric tons) yr(-1) of suspended sediment in the Hanalei River and 2300 +/- 700 Mg yr(-1) deposited on the coastal plain, however, the delivery of sediment in the Hanalei basin ranged between 45\% and 101\% of the maximum predicted USLE value (88 +/- 103 Mg km(-2) yr(-1)). This higher than predicted yield may be the result of mass movement. We are not able to differentiate, however, between erosion and mass movement as the principle agent of denudation. Our measurements indicate a total sediment yield of 140 +/- 55 Mg km(-2) yr(-1) for the Hanalei Valley. (C) 1999 Elsevier Science B.V. All rights reserved.}, issn = {0169-555x}, doi = {10.1016/S0169-555x(99)00030-6}, author = {Calhoun, R. S. and Fletcher, C. H.} } @article {738, title = {Sea level higher than present 3500 years ago on the northern main Hawaiian Islands}, journal = {Geology}, volume = {26}, year = {1998}, note = {Zg996Times Cited:34Cited References Count:25}, month = {Apr}, pages = {363-366}, abstract = {New data from an emerged coastal bench and associated fossil beach on Kapapa Island (Oahu), Hawaii, preserve a detailed history of middle to late Holocene sea level. These include 29 new calibrated radiocarbon ages and elevations indicating mean sea level reached a maximum position of 2.00 +/- 0.35 m ca. 3500 yr B.P. These results correlate with additional evidence from Hawaii and other Pacific islands and provide constraints on Oahu{\textquoteright}s long-term uplift rate (0.03-0.07 mm/yr), previously based solely on Pleistocene age shorelines. Our sea-level reconstruction is consistent with geophysical model predictions of Earth{\textquoteright}s geoid response to the last deglaciation and with observations of increased Antarctic ice volume during the late Holocene.}, issn = {0091-7613}, doi = {10.1130/0091-7613(1998)026<0363:Slhtpy>2.3.Co;2}, author = {Grossman, E. E. and Fletcher, C. H.} } @article {875, title = {Late holocene coastal plain stratigraphy and sea-level history at Hanalei, Kauai, Hawaiian islands}, journal = {Quaternary Research}, volume = {45}, year = {1996}, note = {Uf728Times Cited:21Cited References Count:35}, month = {Jan}, pages = {47-58}, abstract = {Fluvial, marine, and mixed fluvial-marine deposition on the coastal plain of Hanalei Bay on the north shore of Kauai, Hawaii, records a middle- to late-Holocene fall of relative sea level. Radiocarbon dating of the regression boundary preserved in the stratigraphy of the coastal plain documents a seaward shift of the shoreline beginning at least 4800-4580 cal yr B.P. and continuing until at least 2160-1940 cal yr B.P. Marine sands stranded in the backshore and coastal plain environment are buried by fluvial floodplain and channel sands, silts, and muds. In places, erosion at the regression contact exposed older marine sands thus increasing the hiatus at the regression disconformity, The shoreline regression is best explained as the result of a fall in relative sea level. The age and elevation of the cored regression boundary at sites that have not been influenced by erosion are consistent with a middle-to late-Holocene highstand of relative sea level as predicted by geophysical models of whole Earth deformation related to deglaciation. (C) 1996 University of Washington.}, issn = {0033-5894}, doi = {10.1006/qres.1996.0005}, author = {Calhoun, R. S. and Fletcher, C. H.} }