Arched Isotelus From Walcott Rust Quarry

The famous Walcott-Rust quarry of upstate New York yields the best preserved Isotelus trilobites in the world. Unlike the other localities they are found, they are preserved perfectly inflated, with no crushing of the shell. This little beauty is one such example. It would be 1.8 inches long if fully outstretched and has a thick, dark brown shell.

I collected this specimen this past summer, and it was one of only two small Isotelus I found complete in 5 days of breaking limestone that trip. It look about 6 hours of preparation work to remove the surrounding matrix under microscope. Below is a photo of the specimen unprepared.

Collecting the Walcott-Rust Quarry in Summer 2013
Collecting the Walcott-Rust Quarry in Summer 2013
Walcott-Rust quarry located near Russia, NY is one of the most historic trilobite collecting localities in the world. It was first worked by famed paleontologist Charles Doolittle Walcott along with William Rust back in 1870. It was where Walcott was first introduced to trilobites and he later went on to make many amazing discoveries across North America included the famed Burgess Shale. After being lost for over a century this quarry was rediscovered by Thomas Whitely 1990's who dug and researched the site heavily. It's now leased by Trilobites of America, LLC. Not only is it producing some of the most amazing trilobites found in the US, but outstanding new contributions continue to be made to science.

The limestones of this quarry produce arguably the best preserved trilobites in the United States. Many of them perfectly 3D with no compaction at all. These include types like Ceraurus, Isotelus, Flexicalymene, Sphaerocoryphe and many more. Collected the Walcott-Rust quarry is brutally hard. It requires extracting large blocks of solid limestone (often weighing several hundred pounds) using massive pry bars, 20 lb sledge hammers, wedges, a lot of brute force, and rock quarrying know how. These large blocks are then broken down into smaller and smaller pieces, looking cross sections of the black trilobites in the black rock (a nearly impossible task). When a trilobite is found the real work begins, painstakingly extracting it from it's limestone tomb under high powered microscope using air scribes and abrasives.

Dan Cooper breaks up a block of limestone with a 20 lb sledge in search of Isotelus
Dan Cooper breaks up a block of limestone with a 20 lb sledge in search of Isotelus
Isotelus gigas
Walcott-Rust Quarry, Russia, New York
Trenton Group, Rust Formation, Spillway Member
1.8" around curve
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