Microfossils PDF
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Uploaded by GutsySplendor1834
University of Liverpool
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Summary
This document provides a comprehensive overview of various microfossils, such as acritarchs, dinoflagellates, and diatoms, and their applications in paleogeography, paleoclimatology, and biostratigraphy. It describes how these microfossils can be used to understand past environments and climate conditions. The document also covers the use of microfossils in dating and understanding geological events.
Full Transcript
Microfossils Acritarch Helps in paeolgreography with the reconstruction of early Palaeozoic ocean currents and climate belts Metamorphic history Correlation of upper pre cambrian and palaeozoic rocks. Dinoflagellate Photosyntehtic importance (zooxanthallae) live within coral tissues providing...
Microfossils Acritarch Helps in paeolgreography with the reconstruction of early Palaeozoic ocean currents and climate belts Metamorphic history Correlation of upper pre cambrian and palaeozoic rocks. Dinoflagellate Photosyntehtic importance (zooxanthallae) live within coral tissues providing nutrients through photosynthesis and contributes to coral reef formation. Provide insights into past conditions such as salinity, temperature, and nutrient levels, aiding in climate and sea-level studies. Diatom Useful for dating Cretaceous and Teritiary strata. Correlation of high latitude and deep water deposits. Distribution influences by temperature, salinity, nutrients and pH Diatom deposits help identify ancient shorelines, lake extents and areas of high productivity. Makes itself into chert, found in regions where carbonate dissolution dominates in high productivity zones. Foraminifera Used for palaeoenvironment analysis, for fine sediments, coarse seimdnets, deep sea, hypdersaline, fluctuating salinity, benthic flows, and planktonic forms isotopic analysis Coccolithosphores Biostratigraphy from the Mezoic to the recent strata Absolute palaeotemperatures Relative temperatures Oceanographic patterns Radiolarian Useful for dating Mezoic and Cenozoic sedimentary sequences Paleoceanographic patterns, past ocean temps, nutrient availability, ocean circulation patterns. Radiolarian ooze forms in deep sea environments and after lithification this becomes cherts. Cherts are found in areas that provides evidence of ancient subduction zones. Pollen Shows changes in regional vegetation from seidmnetary cores of lakes and bogs Thermal maturation studies for hydrocarbon industry Provencnace of sediment Helps with archeology
