10. LATE NEOGENE PALEOENVIRONMENT: QUANTITATIVE MICROPALEONTOLOGY
FORAMINIFERA: Part x - Foram Test Shapes & Apertures GEOL 3213 Micropaleontology.
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FORAMINIFERA: Part x - Foram Test Shapes & Apertures GEOL 3213 Micropaleontology
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Transcript of FORAMINIFERA: Part x - Foram Test Shapes & Apertures GEOL 3213 Micropaleontology.
Microscopes used in Studies
• Transmitted light – whole mounts• Transmitted light – thin sections• Reflected light• SEM
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
CLIMATE CHANGES INTERPRETEDFROM DEEP-SEA CORES
• O18/O16 ratios from used to determine – Paleotemperature changes with planktic species & – Ice-volume changes with benthic species
Triserial, planktic