Chazy Fossil Reef, Ordovician fossil reef system in Lake Champlain Islands, US
The Chazy Fossil Reef spans across three Lake Champlain islands, covering 1,567 acres of limestone deposits with ancient marine organism remains.
Geologist James Hall documented the reef in 1847, followed by Canadian paleontologist Elkanah Billings who analyzed the fossils during the 1850s.
The Fisk Quarry Preserve and Goodsell Ridge Preserve offer educational programs about the geological formation and marine life from 480 million years ago.
Visitors can access the Goodsell Ridge Preserve daily from dawn to dusk, with parking available at 69 Pine Street in Isle La Motte.
The limestone contains white bird's-eye patterns created by sliced gastropod shells, visible when the stone surface receives polishing treatment.
GPS coordinates: 44.85280,-73.34000
Latest update: July 24, 2025 11:45
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