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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
January 19, 2021 • 06:06 am
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30 points
30 points
- IIT JAM
- Geology (GG)
Is there any classified form of stratigraphy in which we can see which beds or formations are marine which are fresh water. please tell me the main main points.
is there any classified form of stratigraphy in which we can see which beds are marine which are fresh water.
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Sajan sarthak Best Answer
NO YOU HAVE TO GO THROUGH BOOK AND MEMORISE ...YES IN HIGHER STUDIES YOU WILL KNOW ABOUT TECTONICS SO THAT YOU CAN EASILY KNOW TGE BASIN AND ALL...FOR EXAMPLE SHALE IS A MARINE SEDIMENTS , CONGLOMERATE DEFINES UNCONFORMITY. ETC.
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Saurabh 1![best-answer]()
Well i don't think that there exist any specific study related to the formations and the environment related. You have to cram alot, as stratigraphy in rare cases involves concepts. But various studies like sequential stratigraphy is used prominently in case of accumulation , Progradation and Retrogradation. Also various minerals are found to be the characteristics of specific environment like fe oxides shows the Reducing or oxidising prevailed environment, glauconite shows humid conditions, calcite or the limestone shows warmer conditions in marine realms. Also some marine environment like shelf or shoreface facies involves some regressive formations(like coarsening upward sequence while fining upward in case of transgressions) . Also some paleontological traces or biomarkers can give idea about the formation and the environment related to the respective formation(as some phylum thrives in marine conditions while some of them thrives in freshwater conditions and some of them compatible with the both norms).
ok.