Origin of peloids in Early Cretaceous deposits, Dorset, South England

摘要: Peloids are ubiquitous components in modern and fossil carbonates. The term peloid is non-genetic because the origin of these grains pathways their formation not fully understood. Based on Berriasian material originating from Dorset, southern England, we report here peloids that result more or less in-place breakdown previously micritized bivalve shells. continuum shell to documented by petrography observation scanning electron microscopy. identical elemental composition shells confirms petrographic interpretation. Bivalve were entirely appear be preferential source for peloids. Obviously, micritization weakened shells, facilitating abrasion. This identifies fragmentation as a process leading distinct peloids, adding categories recognized date. Mold, mud, microbial observed studied sections herein derived