Surface sediment grain diameter measurements from point counts of in situ seafloor images collected in the lower Columbia River, Washington and Oregon, 2021

This dataset contains surface sediment grain diameter measurements from in situ seafloor images collected in the lower Columbia River, Washington and Oregon, in 2021....本数据集包含源自2021年于华盛顿州与俄勒冈州境内哥伦比亚河下游采集的原位海底图像（in situ seafloor images）的表层沉积物粒径（surface sediment grain diameter）测量数据。