Gypsum (K/1/Perm/Eng)
 2.5x cross nicols
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 5x cross nicols
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 10x cross nicols
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| Outstanding feature | Gypsum lathes |
| Folk Classification | Gypsum Crystals |
| Dunham Classification | Gypsum Crystals |
| Common Grains | Gypsum Crystals |
| Sorting | |
| Rounding | |
| Micritization & envelopes | |
| Cement & diagenetic fabric | Gypsum |
| Porosity | none |
| Depositional Setting | Evaporitive marine setting |
| Diagenetic history | Evaporite precipitation |
Gypsum Crystals forming at the edge of the Permian Zechstein Sea in the North of England.
Thursday, November 11, 2021