Of the 159.5 ha of larger remnant aspen stands only approximately 25 ha. are within present SSSI's or NNR's.
A valley bog is distinguished by having an identifiable water flow as, for example, at Pettypool SSSI.
See our section on Beyond SSSIs for more information on geological conservation outside of the SSSI series and for links to partner organizations.
Research is being carried out into developing methods of slowing the rate of cliff erosion without damaging the SSSI.
The new SSSI status is to help protect the unique freshwater mussel, which in the past produced a freshwater mussel, which in the past produced a freshwater pearl for the Queen.