We thank Grimley et al. (2019) for their constructive comments on our publication on Holocene loess in Illinois revealed by Optically Stimulated Luminescence (OSL) dating (Miao et al., 2018) in the journal Quaternary Science Reviews. Their skepticism on the preservation of Holocene loess in Illinois provides us with a good opportunity to clarify several key issues: pedoturbation (including bioturbation), the methodology of soil research and our OSL dating results. In addition, we will discuss the more fundamental issue behind this debate: what controls loess deposition in the Midwestern USA, direct glacial sediment supply or broader-scale climate change? Finally, we also report new high-resolution grain size, magnetic susceptibility and color data from one of our Holocene loess sites.
ASJC Scopus subject areas
- Global and Planetary Change
- Ecology, Evolution, Behavior and Systematics