He returns earth mounds, glaciated rock, ice and flood plains to cities that forgot they had them.
These "mega slumps" (5 40 ha) are now common in formerly glaciated, fluvially incised, ice-cored terrain of the Peel Plateau, NW Canada.
According to my latest model for the last glacial maximum (LGM) (Grosswald 1988), the Arctic continental margin of Eurasia was glaciated by the Eurasian ice sheet, which consisted of three interconnected ice domes --the Scandinavian, Kara, and East Siberian.
This may be because in the recently glaciated Swedish landscape, the ice sheet itself and the melt water from the declining ice sheet have transported soil material over large distances and/or because of low sampling density in many parts of the country.
Ancient and medieval observations also suggest the presence of longer-term variations, which could be produced by alterations in the moment of inertia of Earth resulting from both the ongoing rise of land that was glaciated during the Pleistocene Ice Age (which ended around 11,700 years ago) and the sea-level changes associated with the freezing and melting of polar ice.
Anything less than a snowball--such as a partially glaciated world with lingering ice-free ocean waters and the iridium could not build up.
The second is topographic heterogeneity [62] within the glaciated central Alps providing ice-free nunatak areas with greater possibilities for in-situ survival and diversification [25], [63] compared to the less dissected plateaux within the intensively glaciated Scandes where there is no evidence of continuous in-situ survival [27].
In glaciated regions, the movement of ice sheets scoured the landscape, and the weight of the ice depressed Earth's crust below.
The period 720 million to 540 million years ago was marked by violent swings in climate, including ice ages that glaciated most or all of the planet, and marine evolution of the first complex organisms.
This increase has previously been attributed to enhanced mantle decompression and melt generation due to ice unloading in glaciated regions.
However, we find that there is an increase in explosive volcanism at the end of the last ice age in glaciated areas; this trend is not observed in areas unaffected by glaciation.
