What can s

Notes

What can scientists determine from microfossils? a.how environments and climates have changed in the past b.where oil and gas can be found today c. Age determination d. Correlation of strata e. Biostratigraphic zonation Charactertics of microfossils Their minute/ small size Their global distribution in sedimentary rocks Wide geographic distribution Their abundance Organic-walled microfossils Dinoflagellate cysts Acritarchs Chitinozoa Scolecodonts Spores and pollen Foraminiferal test linings and much more The life style of foraminifera Most foraminifera are marine and are benthonic that live on or within the sea floor sediments While a smaller number floats in water column at various depths and are called planktonic. Fewer are known from freshwater or brackish water environment Foraminifera feed on diatoms, algae, bacteria and detritus The dating of microfossils from cuttings samples is misleading because of: Uncertainty of the level from which cuttings came Caving Redeposition or reworking The neritic zone is the best for microfossils to survive because of: Photosynthesis Penetration of light Too much nutrients The two stages in the life cycle of foraminifera: a. Megalos...