An album that still preserves the popular melodic aspect of his previous works, though it points to the direction that his music would take after that.
The core zones are formed by several national parks and biotopes (wildlife preserves), in which no human settlement, logging, or extraction of resources are allowed.
The marine record preserves all the past glaciations; the land-based evidence is less complete because successive glaciations may wipe out evidence of their predecessors.