NEWSREADER Amanda Parr will unveil a board that uncovers the past at Leigh Delamere service station on Saturday at 12.30pm.
The board tells the story of this area of Wiltshire as it would have looked 165 million years ago and the project has been co-ordinated by Wiltshire Geology Group and Moto, which manages the M4 services.
Money for the project has come from English Nature.
Ms Parr is from BBC Points West television news.
Leigh Delamere Services is on the site of an old quarry where an extensive rock face can still be examined by the public. The geological interpretation board, in front of the rock face, explains the history of the rocks, how they formed under the sea and why they are being protected for future research and general interest.
The board is located in the Travelodge garden, below the hotel entrance.
Isobel Geddes, a member of the Wiltshire Geology Group and author of a book on Wiltshire's geology said: "This is the culmination of many months of planning and improving the site so that the public can enjoy and learn more about Wiltshire's fascinating geological history."
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