anonymous 16352 Grain-size data from dry sieving and GRADISTAT analysis of inter-reef surface sediments, Spermonde Archipelago, SW Sulawesi, Indonesia Stuhr, Marleen; Kappelmann, Yannis; Mann, Thomas; Westphal, Hildegard (2026): Grain-size data from dry sieving and GRADISTAT analysis of inter-reef surface sediments, Spermonde Archipelago, SW Sulawesi, Indonesia [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.994081 This dataset reports grain-size data for 51 sieved subsamples derived from inter-reef seafloor surface sediment samples from the Spermonde Archipelago, SW Sulawesi, Indonesia. Raw dry sieve weights (mg) are provided for eleven size fractions ranging from >16 mm to <63 µm, together with relative sieving error (%). Statistical grain-size parameters, including mean grain size, sorting, skewness, and kurtosis, were calculated using the Folk and Ward (1957) graphical method and the arithmetic, geometric, and logarithmic methods of moments as implemented in GRADISTAT v8 (Blott & Pye, 2001). Percentile values (D10, D50, D90), modal class(es), textural descriptions, and proportions of gravel, sand, and mud fractions are also reported. These data document the cross-shelf grain-size gradient and provide the sedimentological basis for facies classification. The field sampling was performed in August 2021 in the framework of the HAnsea project, sample depths range from 4.5 to 73.6 m water depth. Data collection was done between June 2023 and April 2024. 16360 https://doi.org/10.1594/PANGAEA.994081 2026-06-29T11:04:23+0000 2026 22524 15141 15264 14657 15251 14898 22525 22526 15169 15250 22527 14181 19292 14209 14046 22528 22530 22531 22532 22533 22534 22535 22536 22537 22538 22539 22540 22541 22542 22543 22544 22545 22546 22547 22548 22549 22550 22551 22552 22553 22554 22555 22556 22557 22558 22559 22560 22561 22562 22563 22564 22565 22566 22567 22568 22569 22570 22571 22572 22573 22574 22575 22576 22577 22578 22579 23102 22582 22583 22580 19648 23619 22586