![]() Sediments that are deposited through the action of rivers are referred to as fluvial depositional environments. We have spent a significant amount of time in chapter five discussing rivers and how they erode, transport, and deposit sediment. These rivers carry the small sediments further from the end of the glaciers into an area called the outwash plain, which consists of poorly sorted sediment. Glaciers also produce a significant though the fluctuating amount of melted water, which flows through the moraines building a system of braided rivers. Glaciers grind and bulldoze rock and create piles of poorly sorted sediment called moraines. Glaciers are fairly slow-moving (centimeters a day) and normally travel short distances from their source, but they can cause immense mechanical weathering. Glaciers most commonly occur in areas that are both high elevation and/or high latitudes. Glacial depositional environments are controlled mostly by the weathering and erosion by glaciers and glacial meltwater. Continental depositional environments are dominated by clastic sedimentary rocks, largely because of their proximity to the source of the sediments. Erosion occurs in high altitude areas and although continents are overall topographically elevated compared to the oceans, there are several different areas on the continent where we get distinctive depositional properties. There are many different environments on the continents, but again we are limited to those that are dominated by the deposition rather than the erosion of sediments. the types of sedimentary structures that may be present.the maturity of those sediments if clastic, and.the types of sediments and sedimentary rocks most likely to occur in that environment,.select the image that best depicts the depositional environment in Figure 10.4 and put the corresponding letter (from Figure 10.4) in the first column,. ![]() As each of the environments is briefly described, think about and fill in Table 3 with the following information: We can break up the numerous depositional environments found on earth into common environments we find on land (continental environments), in the ocean (marine environments), and at the interface between the two (transitional environments). We can then compare these clues to modern environments to reconstruct ancient environments. Sedimentary environments are interpreted by geologists based on clues within such as rock types, sedimentary structures, trace fossils, and fossils. \)Ī depositional environment is the accumulation of chemical, biological, and physical properties and processes associated with the deposition of sediments that lead to a distinctive suite of sedimentary rocks.
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