Albedo feedback accounts for the orbital glaciation and deglaciation being rapid.
The bay is fringed by cliffs rising about 30 m above the sea and consisting for the most part of moraine left behind by receding glaciers of the last glaciation.
Soils of temperate regions do not generally reach this later stage of soil development, as glaciation has periodically reset the clock of soil development to initial stages.
So only at the margins of an ice sheet would the fluctuating sedimentary record be preserved, whereas interior glaciation might compound tills in final deposits of boulder clay.
In chapter six the author writes of glaciers and glaciation, moving on to glacial erosion and deposition.
The record of the oceans leading up to glaciation is more difficult to construct due to common erosional truncation of sub-glacial strata.
Earth history includes several periods of essentially total glaciation.
This simple model may be an adequate explanation of the vexing relationship between the onset of glaciations and apparently closely synchronous episodes of explosive volcanism.
