Neap-spring cycles reflected in Holocene subtidal large-scale bedform deposits: A preliminary note

Sub-Holocene subtidal channel-fill deposits in a tidal inlet in the southwestern part of the Netherlands contain features recognized as due to individual ebb, flood, and slack-water events. Thicknesses of the cross-strata deposited during successive ebbs (the dominant current at the particular place) vary in a sinusoidal way, reflecting the tidal neap-spring cycle. Mud layers deposited during slack-water periods formed in couplets that constitute a unique criterion for distinguishing between subtidal and intertidal environments and facies.