speaking of clastic sedimentary rock
provide a overview of how plate tectonics affects sedimentation. answer the following question
where do sedimentary rocks orginate? A~ orginate from rock and mineral debris that are produced from the weathering and erosion of continental masses?
how are they formed?
what three categories of sedimentary rocks? A~ chemical sedimentary rocks, biogenic sedimentary rocks, and clastic sedimentary rocks?
what are the distingushing characteristics between the three catargories of rocks?
Great site on how sedimentary rock is formed.
http://fi.edu/fellows/fellow1/rocks/create/sediment.htm
Here are a couple of sites on characteristics of the types of sedimentary rock:
http://en.wikipedia.org/wiki/Sedimentary_rock
http://library.thinkquest.org/J002289/sed.html
Great picturs of the types of sedimentary rock with a description.
http://geology.com/rocks/sedimentary-rocks.shtml
did i answer those 2 questions right?
all of these web sites say something different about the three catagories my readings say they are 1. checmical
2.biogenic
3. clastic
all these web site are saying differnt what do i do?
The sites are giving you those classifications and a couple of other minor classification.
Plate tectonics plays a significant role in the process of sedimentation and the formation of sedimentary rocks. As tectonic plates move, they interact with each other, leading to various geologic activities that result in the deposition of sediments. Here is an overview of how plate tectonics affects sedimentation:
1. Weathering and Erosion: Plate movements cause the crust to undergo weathering, which is the breakdown of rocks into smaller fragments through physical or chemical processes. This can include the effects of wind, water, ice, or even volcanic activity. These weathered materials are then transported by erosion, usually by rivers, glaciers, or wind, and eventually reach a depositional environment.
2. Deposition: As sediment-laden water slows down or as glaciers melt, sediments are deposited in specific areas. These may be river deltas, lakes, ocean basins, or other depositional environments. The type of sediment deposited depends on factors such as the velocity of the transporting medium, the size and weight of the sediments, and the energy of the environment.
3. Lithification: Over time, the accumulated sediments become compacted under the weight of the overlying sediments. They are also cemented together by minerals dissolved in groundwater, forming solid rock. This process is called lithification.
To answer your next question regarding the origin and formation of sedimentary rocks, yes, sedimentary rocks originate from rock and mineral debris produced from the weathering and erosion of continental masses. The weathering process breaks down existing rocks into small fragments, which are then transported and deposited in various environments. Over time, these sediments undergo compaction and cementation, eventually forming sedimentary rocks.
There are three categoriess of sedimentary rocks:
1. Clastic Sedimentary Rocks: These rocks are formed from the accumulation of fragments of pre-existing rocks, known as clasts. Clastic sedimentary rocks are classified based on the size of the clasts present, such as sandstone (sand-sized clasts), conglomerate (rounded clasts), or shale (clay or silt-sized particles).
2. Chemical Sedimentary Rocks: These rocks are formed from the precipitation of dissolved minerals from water. When dissolved minerals become supersaturated and can no longer remain in solution, they precipitate and accumulate to form chemical sedimentary rocks. Examples include limestone (composed primarily of calcite), rock salt (halite), and gypsum.
3. Biogenic Sedimentary Rocks: These rocks are formed from the remains of once-living organisms. Over time, the remains of plants or animals can accumulate and become lithified. Examples include coal (formed from the remains of plant matter) and fossiliferous limestone (containing fossilized remains of marine organisms).
The distinguishing characteristics between these three categories of sedimentary rocks lie in their composition, texture, and the processes involved in their formation. Clastic sedimentary rocks have a variable grain size and are made up of rock fragments, while chemical sedimentary rocks form through precipitation of minerals. Biogenic sedimentary rocks, on the other hand, are composed of organic matter or the remains of organisms.