Altered Tremadocian brachiopod, Ülgase, Estonia
Sophie Graul
Tallinn University of Technology, Tallinn, Estonia and France
Cross-section of a phosphorite sample from Ülgase.
The shell shows intense recrystallisation, with almost complete pyritisation of the internal layers (the dark ones may be the initially organic-rich baculate) and iron-rich apatite edges.
Reuse
Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) (opens in a new window)Credit: Sophie Graul (distributed via imaggeo.egu.eu)
Properties
Type
Image
Format
JPG
Size
1.1 MB
Aspect
1599:671
Width
3198 px
Height
1342 px
Coordinates
59.4920, 24.9763
Tint
Bluish gray
Submitted
17 August 2026
Taken
3 March 2025
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