Skeletal - Calcareous Algae - Green Calcareous Algae (Al/15/Jur/Colo)
 2.5x
|
 2.5x cross nicols
|
 2.5x wave plate
|
 2.5x
|
 2.5x cross nicols
|
 2.5x wave plate
|
| Outstanding feature |
Striking example of Chara sp |
| Folk Classification |
Chara biomicrite |
| Dunham Classification |
Chara wackestone to packstone |
| Common Grains |
Calcareous green algae chara with fragments of pelecypods |
| Sorting |
Poor |
| Rounding |
Irregular |
| Micritization & envelopes |
Common |
| Cement & diagenetic fabric |
Micrite |
| Porosity |
None |
| Depositional Setting |
Low energy open marine setting |
| Diagenetic history |
Marine aragonite fans & micrite cementation |
Collected by Harlan Johnson and representative of Chara Limestone from the Morison formation. Algal head of calcareous green algae Chara & fragments of pelecypods cemented with aragonite fans.
Thursday, November 11, 2021