 Unfortunately, paleo-depth constraints for sedimentary strata are poor and subject to contradicting interpretations.However, the depth of emplacement can be conjectured with minor control of water depth.In determining the characteristics of pyroclastic flows in subaerial versus subaqueous deposits, it is commonly believed that water fluidized volcaniclastic flows become normally graded in terms of all components except for large, buoyant pumice blocks which settle to form large pumice layers.