Harrow Weald SSSI
Harrow Weald SSSI is a small protected nature site in the London Borough of Harrow covering roughly 3.7 hectares. The site reveals gravel beds from the Pleistocene period lying above the London Clay layer, making it valuable for geological research.
The site was originally part of larger common lands including Stanmore, Harrow Weald Commons, and Bentley Priory. It was designated as a Site of Special Scientific Interest in 1987 and listed in the Geological Conservation Review.
The name Harrow Weald comes from old English words meaning enclosed land. Today, people use the area for walks and dog-walking while observing birds and seasonal changes in the woods and fields.
The site itself is not open to public access but can be viewed from nearby roads such as Common Road and from adjacent Harrow Weald Common. Visit during daylight hours and wear comfortable shoes if exploring the surrounding green spaces and walking trails nearby.
Scientists once believed the gravel beds formed from ancient seas, but recent research has questioned this theory entirely. This shift in understanding has prompted experts to reconsider how these geological layers actually came to be.
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