This is a Positive and Negative Graptolite on gray rock. You get both pieces.
Here is your chance to own a classic fossil from a classic site.
Harder and Harder to obtain fossils from this private quarry in Middleport, New York
This is an exceptional Positive and Negative Graptolite from the Rochester Shale of New York.
These fossils were collected decades ago and just recently prepared by our prep lab..
Here is a super detailed Graptolite from a classic site in Western new York State.
Graptolites from this site are preserved in spectacular detail. These creatures thrived in the warm inland sea that covered the area during the Silurian Period some 420 million years ago. The fossils living near what is now Middleport, New York were established near a delta system that periodically buried the colonies in silt. This silt eventually hardened into stone that preserved the crinoids in glorious detail. You will get both pieces because they are the positive and negative of the fossil animal.
The Rochester Shale Formation is famous for the fossils found there. Because of the fine grained shale the preservation is great. It was formed during the Silurian Period when that part of New York State was a shallow salt water tropical sea and teeming with life. Because it was near the equator and prone to storms fossil formation was easy. The storms would stir up the ocean floor but also the storms moved on to land. It picked up sand and mud which then washed into the shallow seas and lagoons covering the animal. The animals would die and begin to turn into fossils.
This Graptolite has exceptional detail . It is 3 inches by 2 inches wide. It sits on a piece of roughly triangular matrix 5 1/2 x 3 1/2 It has been meticulously prepared using air abrasive technology. .