RICH SEDIMENTS

Formation of Organic Rich Sediments

Formation of Organic Rich Sediments

Key reasons presented by Pedersen and Calvert in 1990

Pedersen and Calvert devoted a lot of efforts for finding out the logic behind the formation of organic rich sediments. They wanted to assess the elements that play a vital role in the entire process of organic rich sediments. It required a lot of research to find out the correct reasoning's for the entire process. Pedersen and Calvert considered that dissolved oxygen was not a central control on the formation of organic-rich sediments. They wrote a paper that explained in details the main reasons and factors which controls, promotes or influences the formation of hydrocarbon accumulation. They discussed these controlling factors step by step and in a sequential manner in every paragraph. The primary objective was to describe the process that takes place in the ocean for organic productivity. Various fluxes are created that has its own distinctive features. These fluxes assist in building up the organic matter (Clark, 1977, 615).

Apart from the creation of fluxes, there are several factors that influence sedimentation. The factors, influenced by organic contents of marine sediment, anoxia basin and its impact on organic matter. This process has a natural phenomenon and does not involve any extra effort. The carbon production preservation and dilution is a part of this whole process, as well. It enables to keep the oxygen at a minimum level, and, its similar effects then affects the upwelling, and, climate orbital processes with relation to organic carbon production, and, sedimentation. The demand of the oxygen increases, as a result which leads to the situation known as Anoxic condition. In this particular situation, the demand for the oxygen stored in the water exceeds the supply. This occurs due to the different processes that took place in the sea. This process consists of a long duration because of a large number of steps. The other element that also plays a crucial role is cretaceous ocean. The involvement of this ocean leads to a scenario known as anoxic event. The anoxic event is the final stage for the formation of organic sediments. The event has got its singular value because it determines the result of the whole process. The polar, subtropical, tropical and deep water region conditions are the main features of the entire condition. The effects of these features are very high on production of sediments and preservation. These factors cannot be ignored by anyone (Foree, 1970, 849).

This is the reason why Pedersen and Calvert claimed that dissolved oxygen is not an important control on the formation of organic-rich sediments. Their evaluation was based on these findings, and, the overall process behind the formation of organic rich sediments. They believed that Sedimentary rocks are rocks formed as a result of sedimentation of material over the course of time, either on the land or within water bodies on the planet. Sedimentary rocks are second most common of the three types of rocks found on the planet; while ...