Field Assignment Part 2Le n a i Mun chM ay 15, 2011G eo lo gy
1. FaultFaults are fractures in the crust along whichappreciable displacement has taken place. Mostmovements and faults are caused by earthquakesalthough most faults are inactive and ratherremnants of past deformation. When movement isparallel to the dip it is called a dip slip fault.When the displacement is horizontal and parallelto the strike the fault is a strike slip fault.
RustA common example of a weathering processincludes rust. When iron interacts with oxygento form the iron oxide hematite, iron is oxidizedand rust is formed. Rust is an example ofchemical weathering. A rusted bench made of horse shoes.
Weathering Process ExampleFor this fieldassignment I chose apicture of the rustedwheel to showanother example ofthe process ofchemical weathering.
WindWind, although not as significant as othererosional factors, does play a part in erosion.Usually dryer and scanty vegetation are affectedby wind. For my example the tree that blewdown was already nearly dead and dry.
Weathering Process ExampleTo show an exampleof the weatheringprocess of wind Ichose a picture of atree that blew downrecently because ofthe
3. Mass Wasting/ErosionErosion: the physical removal of material bymobile agents.Mass Wasting: the transfer of rock and soildownslope under the influence of gravity.
Erosion: RoadThrough erosionalcomponents the roadhas deteriorated.Many erosionalprocesses as well asman caused erosionhave caused the roadto break apart.
Mass Wasting:The example I found for mass wastingwas the edge of the irrigation canal.After water is put through the canal orit rains the sediment on the edge isslid downward causing the rocks toalso move. It is not an example of abig landslide but is an example on asmall scale of mass wasting.
ContinentalA continental environment is dominated byerosion and deposition associated with streams.For this field assignment the closest thing to methat resembles a stream is the slough. It is waterthat is released from the dam when the rainfalland snowmelt make too much water. Weather ofcontinental environments is a big factor oflandscape alteration.
MarineA marine environment is divided according todepth from the shore to the edge of thecontinental shelf. The shallow environmentsreceive large amounts of sediment from land.The deeper environments include the floors ofthe deep ocean.
TransitionalA transitional environment would be the zonebetween continental and marine environments.The ideal picture for an example of a transitionalenvironment would be a picture of the beach.The beaches are deposits of sand or gravel. Thework of the waves and currents distributes thesand. A delta is also a deposit associated withtransitional environments.
Practical GeologyOne practical use of geology isthe irrigation ditch. I took thepicture of where the water is letinto the ditch. This includesmany agents of geologyincluding water, sediment,rocks, and the building of theditch and dam.