You are out hiking/strolling with a friend and as you cross a stream you see an

Question

You are out hiking/strolling with a friend and as you cross a stream you see an interesting looking rock. You pick it up and begin to explain to your friend (who is smart but never studied geology) what it is and how it made its way into this stream.

1.Give as much detail as possible about your surroundings and the rock you have found.

2.Briefly include a bit about plate tectonics and the rock cycle.

3.Include information about how the hydrologic cycle (aka surface processes) works in opposition to the rock cycle

4.include an explanation of the stream and/or glacier dynamics that may have brought this rock to its resting place in this specific stream.

Explanation / Answer

1. the rock found my friend , i will tell him that this is rock found at the stream , so we can say that its a sedimentary rock an its made by the weathering, sedimentation and lithification and diagenesis of the pre-existing rocks which can be igneous or metamorphic or sedimentary. and we can classified the sedimentary rock by the size of grain of the rocks for example if the rock is made up of fine grained sediments then it can be shale or mudstone.

2. earth surface is composed of 7 major and 20 minor rigid but relatively thin plates. 7 major plates are the north american plate, the south american plate, the eurasian plate, the african plate , indo australian plate, the pacific plate and the antarctic plate. there are three types of plate boundaries divergent plate boundary, when two plates moves away from each other is called divergent plate boundary or constructive plate boundary. second is convergent plate boundary , when two plate move to each other is called convergent plate boundary or destructive plate boundary and third one is transform plate boundary , when two plate alide past each other and there is not any destruction and construction , its also called conservative plate boundary.

rock cycle is quite interesting, any rock from three types of rocks can be change into another rock under the natural agents . igneous rock is called parental rock. when igneous rocks weathered , trasported by natural agents , solidified and after the process of lithification and diagenesis it becomes sedimentary rocks and if igneous rock goes under high PT condition and its physical and chemical properties has been changed , it becomes metamorhic rock. and if sedimentary rock goes under high PT condition and its physical and chemical properties has been changed , it becomes metamorhic rock and if it goes under extreme high PT condition it melts and when comes through the hot spots in the form of lava , via the process of cooling and crystallization it become igneous rock. on other hand metamorphic rock , when it weathered , trasported by natural agents , solidified and after the process of lithification and diagenesis it becomes sedimentary rocks and if if it goes under extreme high PT condition it melts and when comes through the hot spots in the form of lava , via the process of cooling and crystallization it become igneous rock.

3. in hydrological cycle , with the heat H2O changes his form but remain same composition in rock cycle composition and properties of the rock has been entirely changes with heat. and with high heat H2O goes into the atmosphere abd with high PT condition rock goes under the earth.

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