This occurs because particles of different sizes have a tendency to spontaneously segregate and stratify themselves.
Berthault’s research was published in two papers published by the French Academy of Sciences (Berthault 1986, 1988a), and English translations of these papers were subsequently published in a prominent creation research journal (Berthault 1988b, 1990).
Furthermore, they seem to misunderstand the recent results of the RATE research project that showed strong evidence of ubiquitous in situ radiocarbon within fossil specimens that should be radiocarbon “dead” by uniformitarian reckoning.
Such results pose a serious challenge to uniformitarian assumptions underlying conventional radiocarbon age-dating methods.
Likewise, on November 12, 2012, the author of the Naturalis Historia blog posted a lengthy article on Lake Suigetsu (https://thenaturalhistorian.com/creationism/) which included a reproduction of Figure 7 from the Davidson and Wolgemuth (2010) paper. Alternating patterns of distinct laminae are commonly identified within glacial lake deposits and are generally interpreted in the following way: during the summer months as meltwaters increase flow to the lakes, layers of more coarse sediment are formed, whereas the decreased meltwater in winter results in thinner, more clay-rich layers.