Fig. 7From: ESR signal intensity of quartz in the fine-silt fraction of riverbed sediments from the Yangtze River: a provenance tracer for suspended particulate matterComparison of electron spin resonance (ESR) signal intensities among the three size fractions of riverbed samples collected in this study. a Fine-silt versus sand fractions. b Fine-silt versus coarse-silt fractionsBack to article page