Question

1. Sket ch and describe very briefly the principle zones of production and accumulation of marine carbonates What is the difference between rimmed and unrimmed carbonate shelf. Mention the main depositional environments with the help of a sketch. 2.

Answer 1

1. Microalgae are capable of producing bio products and biofuels which are sustainable by using carbon substance and carbon dioxide by various cultivation mode. It is of great significance .

metabolic pathways to orchestrate growth characteristics of microalgae evolve therir system and composition in different condition/ the biomass and byproducts depends on surrounding environment and its cultivation . and is enhanced by regulating carbon metabolism .After completing certain amount of synthetic work to reserve materials and energy the cells acts to divide in daughter cells by undoing metablic pathway such as dna replication and nucler. division the sketch of production process is attached below.

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2. Rimmed Carbonate shelve are the a flat topped platform that has rim of reef or carbonate sand shoals along the seaward margin the reef or shoal forms a barrier that absorbs most of wave energy from open ocean.

Unrimmed carbonate shelves are flat topped shallow marine platforms that ae more or less horizontal in contrast to gentle dipping morphology of carbonate ramp. the lack of any barrier at the full force of oceanic condition . they are there fore high energy environment where carbonates sediment are repeatedly reworked by wave action in the inner part of shelf and where redeposition by storm affects the outer shelf area .

RIMMED PLATFORM Subtidal carbonate tactary Fallout a calcareous plankton Shoroward transport Basinward ranspor UNRIMMED PLATFORM Wave orbitals OPEN SHELF RAMP