Considering volume estimations of up to for the proximal pyroclastic density current deposits, the total bulk volume of the CI eruption is covering most of the eastern Mediterranean and ash clouds reaching as far as central Russia.
22.
However, if a primary mechanism must be selected, the downslope lineal morphology of canyons and channels and the transportation of excavated or loose materials of the continental slope over extensive distances require that various kinds of turbidity or density currents act as major participants.
23.
Mixing below the ice occurs due to density currents generated by heat from direct solar radiation and from meltwater runoff which may differ in density from the lake water due to both temperature and suspended sediment content, depending on its source and flow path.
24.
:Kobberger et al . ( 1999 ) dispute that the shear between the density current and the forming deposit is significant enough to cause all of the rheomorphic structures observed in ignimbrites, although they concede it could be responsible for some of the structures such as imbricate fiamme.
25.
:A model proposed by Schmincke et al . ( 1967 ) and later supported by Chapin et al . ( 1979 ), based on observations on the Wall Mountain Tuff, suggests that the rheomorphic structures such as a pervasive pyroclasts were formed during laminar viscous flow as the density current comes to a halt.
26.
Very often in the Spring to early summer the temperature difference between the cold lake waters and the warmer air over land can be as much as 35-40 �F . Under weak prevailing winds, a density current can often develop in the form of a lake breeze that moves from that water to the adjacent shoreline and several miles inland.
