The origins of marine and non-marine boulder deposits: a brief review

Abstract We identify 14 mechanisms, marine and non-marine, one man made, that result could in the formation of boulder deposits after reviewing issues associated with clast shape, size classification. Four these mechanisms: storm deposits; waterspouts; cliff collapse; catastrophic flooding below sea level, may produce stretching for significant distances along shorelines which be confused historical or prehistoric tsunami deposits. However, recent debate has more specifically focused on parameters can employed distinction between coarse-grained deposits, both occur same location. argue features such as size, areal distribution shape are not uniquely characteristic either deposit. Rather, a wide variety parameters, reflect period frequency transporting waves, need to taken into account. Such analyses aided by profiles evaluate variation modeled flow velocities distance from shoreline. Finally, we compare contrast characteristics coarse grained those northeast Atlantic aid identification wave.