He's not a Greenpeace activist out to make a statement, he's a rock sculptor specialist working for the Bermuda Aquarium, Museum and Zoo (BAMZ), taking a moulding from the rock face at Blackwatch Pass.

However, Gary MacPherson was mistaken for a member of Greenpeace by a passing motorist who promptly called the Police. Much to Mr. MacPherson's alarm, working high in the sky on the rock face, the Police Service - sirens blaring - soon surrounded the foot of his ladder.

Luckily, once everything was explained, Mr. MacPherson was once more left in peace to continue work on the mould.

"It's a mould to produce a piece of rock face you would typically find around Bermuda," explained Aquarium and Zoo curator Brian Lightbourne.

The mould, complete with various geological features such as different types of cross-bedding and fossil snails, will be put on display in the Geological Exhibit in the new Natural History Museum at the BAMZ.

"It's so people can get an idea of the features along the road and what those features can tell us about the geological history of Bermuda," said Mr. Lightbourne.

The mould itself is formed from several layers of silicone.

"The layers that count, the first layers to go on, were done some time ago," said Mr. Lightbourne. "It was just a matter of reinforcing it."

The mould will not remain completely as is, said Mr. Lightbourne. "There will be other fossil features (also generally seen in Bermuda) superimposed over," he said, explaining that the site at Blackwatch Pass was chosen because of the size of the mould they could get.

"It's all for the geological section in the new museum," he said. The Natural History Museum, which is targeted for completion in mid-July, will cover Bermuda's natural history from the first eruptions on the sea bed right through to present day. That includes the arrival of plants, animals and man.