1. FORAMINIFERA: Part x - Foram Test Shapes & Apertures GEOL 3213 Micropaleontology

2. Foram Test Shapes

4. Pyrgo (= Biloculina)

5. Triloculina

6. Quinqueloculina

7. Accessory Structures on Foram Tests

8. Foram Test Shapes, A Review

9. Shapes of Unilocular Tests

10. Modes of Chamber Addition Uniserial growth is shown for simplicity.

11. Stopped Here

12. Chamber shapes

13. Chamber Shapes

14. Foram Apertures Position of hole(s):

15. Foram Apertures Shapes of the hole itself:

16. END OF FILE

18. Microscopes used in Studies Transmitted light – whole mounts Transmitted light – thin sections Reflected light SEM

19. Generalized History Based on Wall Composition & Structure Note: –Early organic walled & arenaceous forams in Cambrian –Calcareous microgranular forams in Ordovician –Porcelaneous in Carboniferous –Hyaline in Permian –Planktic in Late Jurassic –Nummulitids = Late K to Early Cenozoic

20. Review Early History of Forams

21. Review Later History of Forams

22. CLIMATE CHANGES INTERPRETED FROM DEEP-SEA CORES O18/O16 ratios from used to determine –Paleotemperature changes with planktic species & –Ice-volume changes with benthic species Triserial, planktic