Skeletal - Calcareous Algae - Rhodophytae (Al/1/Eoc/Peru)
| Outstanding feature |
Lithoporella laminations |
| Folk Classification |
Poorly washed Lithoporella sparite. Laminae are spar filled |
| Dunham Classification |
Lithoporella bound-stone and packstone |
| Common Grains |
Lithoporella algae |
| Sorting |
Poor |
| Rounding |
Poor |
| Micritization & envelopes |
Some grains affected |
| Cement & diagenetic fabric |
Mixture of micrite, & calcite spar late |
| Porosity |
Negligible |
| Depositional Setting |
Relatively open marine |
| Diagenetic history |
Normal dissolution of aragonite, replacement by calcite and filled by calcite spar |
Striking sample of Lithoporella with unidentifiable grains in a micrite matrix from the Eocene Atascadera Limestone of Peru, collected by J. Harlan Johnson.
Thursday, November 11, 2021