1. Texas Ecoregions *Write your name on your foldable*
Effects of Weathering, Erosion and Deposition in Texas

2. Factors Affecting Our Ecoregions *back of foldable*
Weathering – chemical and physical breakdown of rocks into sediment
Erosion – the movement of sediment from one place to another
Deposition – the placement of sediment after being carried from place of origin

3. Types of Weathering *back of foldable*
Chemical weathering – changes mineral composition of rocks.
Physical weathering–rocks are broken into smaller pieces.

4. Piney Woods #1 Color #1 on Texas Green
Fill in foldable
W.E.D.
W- Soil is produced from weathered granite.
E-Very little erosion occurs here because forests and grass holds soil in place
D- Sediments are carried and dropped along the river route

5. Oak Woods and Prairies #2 Color #2 on Texas Gray
W.E.D.
This area receives a moderate amount of rain which shapes the land. W- E- D-
Trees and grass prevent too much weathering, erosion and
deposition.

6. Blackland Prairie #3 Color #3 on Texas Red
W.E.D.
This area receives a moderate amount of rain which shapes the land. W- E- D-
Trees and grass prevent too much weathering, erosion and
deposition.

7. Gulf Coast Prairie and Marshes #4 & #5 Color #4 & #5 on Texas Dark Blue
W.E.D
W- Waves cause mechanical weathering.
E- Waves cause beach and sediment erosion
D- Sediments can be deposited along the beach and carried out to form sand bars

8. South Texas Plains #6 Color # 6 on TexasLight Blue
W.E.D.
W- Wind and rain weather the terrain
E- Overgrazing of the land has allowed nutrient-rich topsoil to erode way making it hard for grass to grow
D- river can carry sediments to different areas

9. Edwards Plateau #7 Color #7 Brown
W.E.D
W- rock is physically weathered where sheets of rock are peeled away from the surface.
E- Wind and rain erode the rock
D- sediment is carried by rivers to create the soil

10. Llano Uplift #8 Color #8 Yellow
W.E.D.
W- Limestone rock formations with caves formed by chemical weathering
E- Wind and rain erode the rock
D- sediment is carried by rivers to create the soil

11. Rolling Plains #9 Color #9 Light Green
W.E.D.
W- rivers weather the area forming canyons
E- rivers erode the land forming canyons
D- material from erosion is deposited at the mouth of river and river beds changing its shape. 11

12. High Plains #10 Color #10 Purple
W.E.D.
W- weathering of rock by water flowing through the Red River.
E- Palo Duro Canyon was formed by water erosion. Wind erosion occurs where there are little to no plants
D- The water deepens the Palo Duro Canyon by moving sediment downstream.

13. Trans-Pecos #11 Color Orange
W.E.D.
W- Flash floods cause rock to weather
E- Winds erode rock causing sand dunes
D- Soils are a result of weathering and erosion.