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SCI 245 Sedimentary Rocks WK 5

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Sedimentary Rocks 1
Sedimentary Rocks
Axia College
Plate tectonics affect where sediment falls to the way that rocks are formed

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Sedimentary Rocks 2
from the sediment. There are three different types of sediment rocks that are created in
similar manner but actual make up each sediment rock is very difficult. There is clastic
sediment that will form clastic sedimentary rock, chemical sediment that will form
chemical rock, and then there is Biogenic sediment that will eventually form Biogenic
sedimentary rock. This happens in many different ways and plate tectonics help this
process all along the way. “Divergent margins create rift valleys and passive continental
margins. Colliding tectonics plates create structural basins and valleys associated with
mountain ranges as a result of the folding and faulting of rock. Subducting plates form
deep oceanic trenches along with volcanic arcs that may have back-arc basins. All of
these locations are effective traps for sediment.” (From Sediment to Sedimentary Rock,
2008). Convergent plate boundaries can usually be found on the edges of high mountain
ranges due to plate collisions. When pieces of the mountain breaks off it falls to low-
lying areas as gravel and sand. Convergent plate boundaries lie in very low-lying
trenches caused by the subduction of plates. The sediment will pile up quickly because
these areas are so steep. Once sediment has settled it will then begin the process in
becoming a rock.
Sediment goes through a process called “lithification” that enables the sediment to
form rock. The sediment is transformed into rock by various procedures. Most of the

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