It is now used as a standard procedure of determining exposure ages of erratic boulders
and the respective moraines (e.
The middle, most argillaceous part of the Vormsi Stage contains the endemic saukrodictyid brachiopod Hulterstadia cor (Wiman), known previously only from erratic boulders
on the Island of Oland (Sweden) (Wiman 1907; Harper 2000).
Van Veen discusses early ideas about erratic boulders
and glacial phenomena in the Netherlands.
A systematic census and analysis of erratic boulders
and other tsunamigenic features along shorelines elsewhere in the world may provide a means for extending the historic record and thus more accurately assessing tsunami hazard.
There were lively debates in this area, especially about such inexplicable phenomena as erratic boulders
transported thousands of miles from their original sites.
In addition to lithology and mineralogy of glacial deposits mentioned above, the published results include those on stratigraphy of Quaternary sediments, topography of Estonian bedrock, evolution and geomorphology of the Quaternary cover, evolution of the Baltic Sea and its ancient coastal formations, distribution of erratic boulders
, development of large lakes, protection and complex use of Estonian mineral resources, environmental history, and nature protection.
It was the discovery of erratic boulders
made of rock quite different from the surrounding landscapes which led scientists to devise the theory of Ice Ages in the 1830s and 1840s.
The AONB also includes Castle Ring, an Iron Age hill fort, which is the highest point on the Chase, and several glacial erratic boulders
that are the remnants of glaciation, including one that's mounted on a plinth.