of the shields creates compressional areas within overall extensional
plates, as can be seen along the fault lines of the Middle East
and the Mediterranean.
This is the different interpretation of compressional
areas which I referred to earlier, which I believe occurs in other
key areas. For example, it is believed that the Juan De Fuca and
Gorda plates are converging with North America, because they have
the characteristics of compressional fault lines. However, I suspect
that the degree of subduction is in reality far less than that required
to swallow entire pre-historic sea-beds, and the compression between
the plates in that instance is due to a collapsing of those plates
on an increasing sphere ( see: ptss
isostatic compensation ).
In this expanding and contracting model,
without the need for these seafloors to account for a constant diameter,
Europe is simply a tear in the plate which, like the Himalayas and
the American West coast plates, becomes compressional as the plate
falls back onto itself.
( the old Expdaning Earth theory has
interesting observations about Africa in relation to this. They
will be outlined in the Expanding Earth Sub-section: eess