So many times we have parked our car just south of
Bamburgh and crossed the sand dunes to the beach. In our eagerness to reach the beautiful beach we don't really stop and consider the dunes and what they represent.
So this post is dedicated to the sand dunes of the north east beaches.
First off is the question of the underlying rock which is usually the Whin Sill. This andesitic rock produces poor quality acidic soils. The east facing slopes are generally dipping and typically have shallow lime rich and draught prone soils.If you then add in the harsh maritime conditions you get a very distinct environment with some unique plants.
Most of the
Northumberland dunes are calcareous due to their high shell content. This soil supports a colourful flower rich ecosystem during the hot summer months with the low levels of nitrogen discouraging some of the more vigorous plants found in the area.
Most of the coastal dunes were formed 200 to 300 years ago. There are older ones, especially around
Lindisfarne, but these are more acidic due the calcareous remains of shells having been leached out of them over time. These more acidic and older dunes typically have more heath type grasses and plants.
Our next post on the dunes will talk about the different colours and how they develop.
Labels: Bamburgh, beach, dunes, Seahouses