![Fossil Snail Shells Offer New Tool for Determining Ancient Ocean Chemistry | Jackson School of Geosciences | The University of Texas at Austin Fossil Snail Shells Offer New Tool for Determining Ancient Ocean Chemistry | Jackson School of Geosciences | The University of Texas at Austin](https://www.jsg.utexas.edu/news/files/Gastropod.-1.jpg)
Fossil Snail Shells Offer New Tool for Determining Ancient Ocean Chemistry | Jackson School of Geosciences | The University of Texas at Austin
![Miniature snail in a rock sandwich: Study describes first fossil record of thorn snails in the southern US Miniature snail in a rock sandwich: Study describes first fossil record of thorn snails in the southern US](https://scx2.b-cdn.net/gfx/news/2023/first-fossil-record-of.jpg)
Miniature snail in a rock sandwich: Study describes first fossil record of thorn snails in the southern US
![File:Crommium angustatum fossil snail shell (Lower Oligocene; Gaas, Aquitaine, France) 3 (17149862012).jpg - Wikimedia Commons File:Crommium angustatum fossil snail shell (Lower Oligocene; Gaas, Aquitaine, France) 3 (17149862012).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7b/Crommium_angustatum_fossil_snail_shell_%28Lower_Oligocene%3B_Gaas%2C_Aquitaine%2C_France%29_3_%2817149862012%29.jpg/1200px-Crommium_angustatum_fossil_snail_shell_%28Lower_Oligocene%3B_Gaas%2C_Aquitaine%2C_France%29_3_%2817149862012%29.jpg)
File:Crommium angustatum fossil snail shell (Lower Oligocene; Gaas, Aquitaine, France) 3 (17149862012).jpg - Wikimedia Commons
![Multimedia Gallery - Fossil snails known as turritellid gastropods; they're about 13 million years old. | NSF - National Science Foundation Multimedia Gallery - Fossil snails known as turritellid gastropods; they're about 13 million years old. | NSF - National Science Foundation](https://www.nsf.gov/news/mmg/media/images/past_life1_h.jpg)
Multimedia Gallery - Fossil snails known as turritellid gastropods; they're about 13 million years old. | NSF - National Science Foundation
![File:Crommium angustatum fossil snail shell (Lower Oligocene; Gaas, Aquitaine, France) 1 (17125513006).jpg - Wikimedia Commons File:Crommium angustatum fossil snail shell (Lower Oligocene; Gaas, Aquitaine, France) 1 (17125513006).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/d/d6/Crommium_angustatum_fossil_snail_shell_%28Lower_Oligocene%3B_Gaas%2C_Aquitaine%2C_France%29_1_%2817125513006%29.jpg)