Turritella
Fossil
Also called Tower shell and Screw shell
About it
Long, slender, tightly coiled snail shells shaped like a tower, common in Cretaceous to Neogene marine beds. Wyoming's "Turritella agate" is misnamed: its snails are the freshwater Elimia.
- Type
- Fossil (mollusc)
- Group
- Gastropod (mollusc)
- Colours
- white, cream, grey, brown
- Transparency
- opaque
- Periods
- Cretaceous, Paleogene, Neogene
Typical values: real specimens vary. For more, see mindat.org.