Abstract. The Spermonde Archipelago, off the coast of southwest Sulawesi, consists of
more than 100 small islands and hundreds of shallow-water reef areas. Most
of the islands are bordered by coral reefs that grew in the past in response
to paleo relative sea-level changes. Remnants of these reefs are preserved
today in the form of fossil microatolls. In this study, we report the
elevation, age, and paleo relative sea-level estimates derived from fossil
microatolls surveyed in five islands of the Spermonde Archipelago. We
describe 24 new sea-level index points, and we compare our dataset with both
previously published proxies and with relative sea-level predictions from a
set of 54 glacial isostatic adjustment (GIA) models, using different
assumptions on both ice melting histories and mantle structure and
viscosity. We use our new data and models to discuss Late Holocene (0–6 ka) relative sea-level changes in our study area and their implications in terms of modern relative sea-level estimates in the broader South and Southeast Asia region.
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