The rocks of the
area are divided into three distinct groups: those of the Lowlands, those of the
Highlands, and a third group sandwiched in the middle formed of sediment, known
as the Highland Boundary Complex.
The rocks belonging to the Highland group
are the older, being metamorphic rocks of the Dalradian period, while those of
the Lowlands are Devonian sedimentary rocks, much younger in origin. The Highland
rocks underwent a period of compression and uplift, forming the mountain ranges
of the north - which in fact are still growing.
|Highland Fault Line|
effects of the change in rock structure is not only obvious here at the coast,
if you take a look at the farms to the north and south of Stonehaven it becomes
readily apparent how the geological upheaval of millions of years ago still has
an impact today.
With the soils of the land south of Stonehaven formed
from the red sandstone, agriculture is much more productive than on the land formed
to the north from hard metamorphic rock.