Marius Arsenault, who has been working on a significant fish fossil site in Miguasha Park in Quebec for the past 30 years said the fish fossil site was internationally renowned.

"I can assure you, the event that took place 365 million years ago in Canowindra is unique on this planet. It's not huge, but it is unique," he said.

Mr Arsenault believes the site should be excavated further and opened to the public instead of being closed off as it is now.

"The site would need to be reopened. The best experience people have in Miguasha is they get to see where the action was.

"They can touch the rock. It [Canowindra's site] has to be enhanced," he said.

The first portion of the fossil bed was discovered by chance by a roadworker in 1955 during the grading of unsealed road between Canowindra and Gooloogong.

Paleontologist Dr Alex Ritchie undertook a major excavation of the site in 1993, unearthing 70 tonnes of rock slab containing about 3,000 fish specimens.

The fossils are now housed at the Age of Fishes Museum Canowindra.

Councillor Jenny Weaver said enhancing the site has always been on Cabonne's agenda, but affording the major project was a problem.

"It's always been a plan to put a viewing platform on the site, but our biggest problem is money.

"We don't get the support we need from the Federal and State Governments in establishing these things."