This was despite investment of Rs 8.58 crore by the Tourism Corporation of Gujarat Ltd (TGCL), said report of the Comptroller and Auditor General, tabled in the Assembly today.
Geological Survey of India found the 6.5 crore-years-old fossils site at Raiyoli village in Kheda district in 1981-82.
Around 100 eggs of dinosaurs, bones and other fossilised remains were found during the excavation. It is known to be the largest egg hatchery site in the world with home to seven species of dinosaurs.
"Fossils at the site may provide vital information to scientists... (they) need to be excavated scientifically and studied....However, there was no research on fossils. Further, some samples were sent to Jaipur laboratory for analysis but report was not available on record (till June 2014)," it said.
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"Eggs hatcheries site remains unfenced. The Forest and Environment Department was not having inventory for various fossils lying at the site and no photo documentation of fossils was prepared since the discovery," the report said.
With no development and preservation, only 2,284 people visited the site between 2009-14, it noted.