Diverse erosional indicators along a rapidly retreating Holocene strandplain margin, leeward Hiiumaa Island, Estonia

A diverse suite of erosional features along the shoreline Lehtma (Hiiumaa Island, Estonia) is used to assess their morphodynamic context and preservation potential. The Holocene strandplain east-facing (leeward) has experienced rapid retreat due anthropogenically induced sediment deficit. study site located just updrift erosional-depositional fulcrum segment, with southerly longshore transport resulting in accumulation eroded sand a drift-aligned spit. most prominent indicators are mature pine trees different stages undercutting, toppling, fragmentation, burial. Morphological include scarps paleo-beach/dune ridges (height: > 1 m), as well modern berm scarps. Mineralogical exemplified by heavy-mineral concentrations (HMCs) variable thickness (some 2 cm) concentration. Representative samples show substantial increase bulk low-field magnetic susceptibility ranging from < 10 µSI common nearby coastal lithosomes 8,000 second-cycle HMCs within enrichment zones. conceptual morphosedimentary model describing recent current state system, potential specific structures recognition geological research (e.g., georadar signatures buried HMCs) proposed. approach presented this can be distribution Baltic Sea coast mineralogically heterogeneous, forested sandy shorelines worldwide.