WED in Texas

WED in TexasWED in Texas

Weathering – Wear away Weathering – Wear away or change the appearance or change the appearance or texture of something. or texture of something.

Type of weatheringType of weatheringMechanicalMechanical

Mechanical Weathering – Mechanical Weathering – The physical breaking The physical breaking

down of sediment without down of sediment without changing of the minerals.changing of the minerals.

AbrasionAbrasion

The colliding of rocks hitting one another and smashing The colliding of rocks hitting one another and smashing away at eachother.away at eachother.

http://www.utdallas.edu/scimathed/resources/torch/bb00_geo-al.htm

ExfoliationExfoliation

Rock exfoliation is form of mechanical weathering in which successive layers of a large plutonic rock break loose and fall when

gravity pulls them down.

http://www.goatview.com/january11.htm

Root PryRoot Pry

It is when the roots start to crack rock and go through it, and It is when the roots start to crack rock and go through it, and weather it.weather it.

http://epod.usra.edu/blog/2009/12/mechanical-weathering-and-root-pry.html

Thermal expansion and Thermal expansion and Contraction.Contraction.

When the constant cycle of heating and cooling causes the rock to break When the constant cycle of heating and cooling causes the rock to break into pieces and fall.into pieces and fall.

http://www.uvm.edu/~geomorph/gallery/?Page=details.php&ls=0000002823

Type of weatheringType of weatheringChemicalChemical

Chemical Weathering - The Chemical Weathering - The chemical breaking down of chemical breaking down of sediment while changing of sediment while changing of

the minerals happens.the minerals happens.

OxidationOxidation

Oxidation happens when the Oxidation happens when the iron inside the rock combines iron inside the rock combines with oxygen from water and with oxygen from water and

turns red.turns red.

http://www.utdallas.edu/scimathed/resources/torch/bb00_env-lb.htm

Carbonic acidCarbonic acid

Carbonic acid forms when Carbonic acid forms when Water seeps through the soil Water seeps through the soil

and reacts to and reacts to limestone/marble.limestone/marble.

http://www.fredericksburgtxrealestate.com/Texas_Hill_Country_Real_Estate.htm

Acid RainAcid Rain

Acid rain happens when Acid rain happens when curtain pollutants in the curtain pollutants in the air combine with rain.air combine with rain.

http://www.absoluteastronomy.com/topics/Acid_rain

Plant AcidsPlant Acids

Plant acid is when certain plants, Plant acid is when certain plants, like lichens, produce acid and like lichens, produce acid and

breakdown the rock chemically. breakdown the rock chemically. http://www.utdallas.edu/scimathed/resources/torch/bb00_geo-al.htm

ErosionErosion

– The moving of sediment from one place The moving of sediment from one place to the next.to the next.

www.fsa.usda.gov/FSA/newsReleases?mystate=tx...

Features of River, with Features of River, with Deposition and Erosion Deposition and Erosion

TributaryTributary

A river receives water and sediment A river receives water and sediment from a tributary- a smaller river or from a tributary- a smaller river or stream that flows onto it. In Texasstream that flows onto it. In Texas

http://www.americansouthwest.net/texas/big_bend/boqsidecyn1

Oxbow LakeOxbow Lake

An oxbow lake is a meander cut off An oxbow lake is a meander cut off from a river by deposition of from a river by deposition of sediment. In Texassediment. In Texas

http://www.twdb.state.tx.us/instreamflows/Studies/oxbows/Hog_island/Photos/HogIsland_photos.htm

Valley WideningValley Widening As a river approaches sea level, it As a river approaches sea level, it

may meander more and develop a may meander more and develop a wider valley and a broader flood wider valley and a broader flood plain. In Texas plain. In Texas http://enr.construction.com/resources/special/archives/highways_2003.asp

DeltaDelta Sediment deposited where a river Sediment deposited where a river

flows into an ocean or lake builds up flows into an ocean or lake builds up and makes a landform called a delta. and makes a landform called a delta. In Texas In Texas http://soundwaves.usgs.gov/1999/05/

Waterfall & RapidsWaterfall & RapidsWater fall and rapids are common Water fall and rapids are common where the river passes over harder where the river passes over harder rock. In Texas rock. In Texas http://wildtexas.com/texas-parks/hamilton-pool-nature-preserve

V-shaped ValleyV-shaped Valley Near it’s a source, a river often flows Near it’s a source, a river often flows

through a deep, V-shaped valley. As the through a deep, V-shaped valley. As the river flows, it cuts a deeper valley. In river flows, it cuts a deeper valley. In Texas Texas http://prism.tc.cc.tx.us/bbvirtual/boot/boot.html

MeandersMeanders

Where river flows across easily Where river flows across easily eroded sediment, its channel bends eroded sediment, its channel bends from side to side in a series of from side to side in a series of meanders. In Texas meanders. In Texas cpdmigration.com/admin/meander-migration&page=4

Flood PlainFlood Plain

A flood plain forms when a river’s A flood plain forms when a river’s power of erosion widens its valley power of erosion widens its valley rather than deepening it. In Texasrather than deepening it. In Texas

www.flickr.com/photos/jgrady/2193991811/ www.flickr.com/photos/jgrady/2193991811/

BeachesBeaches

Sand carried down stream by rivers Sand carried down stream by rivers spreads along the coast to form spreads along the coast to form beaches. In Texasbeaches. In Texas

http://www.planetware.com/picture/usa-blue-sky-and-beach-in-texas-us-tx397.htmhttp://www.planetware.com/picture/usa-blue-sky-and-beach-in-texas-us-tx397.htm

DepositionDeposition

Deposition is the leaving or dropping Deposition is the leaving or dropping off of sediment. off of sediment. WWW.teacherweb.comWWW.teacherweb.com

DeltaDelta Sediment deposited where a river Sediment deposited where a river

flows into an ocean or lake builds up flows into an ocean or lake builds up and makes a landform called a delta. and makes a landform called a delta. In Texas In Texas http://soundwaves.usgs.gov/1999/05/http://soundwaves.usgs.gov/1999/05/