Collapse of ancient oceanic reef complex - what happened during collision of Akiyoshi reef complex? Sequence of collisional collapse and generation of collapse products

The rock-unit previously designated as the Akiyoshi Limestone Group is redefined as a heterogenous aggregate of the collapsed products, much of which has experienced the internal destruction and some of which have been redeposited. The areally reversed stratigraphy of the Akiyoshi Limestone Group can be explained by the upside-down attitude of large collapse products due to their rotation during the downslope movement. -from Authors