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NS3310-Physical Science StudiesNS3310-Physical Science Studies
Weathering and Erosion
TopoBingo TopoBingo • You will each get a map.
• Each map has information about how to read it, and symbols that tell you where certain features are.
• As I call out each feature, look for that symbol on your map.
• The first team to get 5, gets Bingo
Agents of Weathering and ErosionAgents of Weathering and Erosion• Water
– Flooding– Dissolution
• Wind
– Scouring– Aeolian transport
• Gravity
– Slides, Slumps and Creep
• Ice (Glaciers)
– Frost Wedging– Scouring
Rivers and StreamsRivers and Streams
• Watershed– Climate– Terrain– Rainfall
• Bedrock– Permeability– Mineralogy– Faults
Water Flows Downhill!Water Flows Downhill!• Life Cycle of a Meandering River
– Degradational Stage• Tributaries• River Channel
– Balanced Stage• Point Bars• Levees• Flood Plains
– Aggradational Stage• Distributaries• Deltas
– Terminal Stage– Stream Piracy
Drainage PatternsDrainage Patterns
• Dendritic
• Rectangular
• Tellis
• Raidal
Erosional FeaturesErosional Features
• Meanders– Oxbow Lakes
• Cut Banks
• Terraces– Transgressive Sequences– Regressive Sequences
Depositional FeaturesDepositional Features
• Point Bars
• Levees
• Flood Plains
• Deltas
• Environments of Deposition
WindWind
• Mechanisms of Sand Transport– Saltation– Aeolian transport
• Sand Drifts
• Sand Dunes– Wind Speed– Wind Direction– Variability
Wind is the Dominant Factor in Arid Regions
Wind is the Dominant Factor in Arid Regions
• Depositional Features– Alluvial Fans– Bajadas– Playa Lakes
• Erosional Features– Plateaus– Mesas– Buttes
GlaciersGlaciers
• Alpine Glaciers
• Piedmont Glaciers
• Continental Glaciers
Alpine GlaciersAlpine Glaciers
• Hanging Valleys
• Cirques
• Aretes
• Horns
• Moraines
Continental GlaciersContinental Glaciers
• Moraines– Lateral– Terminal
• Outwash Plain– Drumlins– Eskers– Kettle Lakes
Glacial CyclesGlacial Cycles
• Why Glaciers– Land at the Poles– Global Temperature
• Glacial Cycles– Glacial Maximum– Glacial Minimum– Interglacial Periods
GravityGravity
• Slides– Rock– Mud– Avalanche
• Slumps
• Creep
Key ConceptsKey Concepts• Erosion is the movement of earth materials created by chemical and
physical weathering
• Landscape features are created by these physical forces acting on the earth’s surface over time (tectonism, volcanism and weathering and erosion)
• Weathering and Erosion change the earth • from the top down
• Water, Gravity, Wind and Ice are all Agents • of Weathering and Erosion
• The earth’s crust records these changes • in Strata
• Studying the earth’s strata tells us about the • earth’s past