NS 3310 Physical Science Studies Weathering and Erosion

NS 3310 -Physical Science Studies Weathering and Erosion

Topo. Bingo • 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 Erosion • Water – Flooding – Dissolution • Wind – Scouring – Aeolian transport • Gravity – Slides, Slumps and Creep • Ice (Glaciers) – Frost Wedging – Scouring

Rivers and Streams • Watershed – Climate – Terrain – Rainfall • Bedrock – Permeability – Mineralogy – Faults

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 Patterns • Dendritic • Rectangular • Tellis • Raidal

Erosional Features • Meanders – Oxbow Lakes • Cut Banks • Terraces – Transgressive Sequences – Regressive Sequences

Depositional Features • Point Bars • Levees • Flood Plains • Deltas • Environments of Deposition

Wind • Mechanisms of Sand Transport – Saltation – Aeolian transport • Sand Drifts • Sand Dunes – Wind Speed – Wind Direction – Variability

Wind is the Dominant Factor in Arid Regions • Depositional Features – Alluvial Fans – Bajadas – Playa Lakes • Erosional Features – Plateaus – Mesas – Buttes

Glaciers • Alpine Glaciers • Piedmont Glaciers • Continental Glaciers

Alpine Glaciers • Hanging Valleys • Cirques • Aretes • Horns • Moraines

Continental Glaciers • Moraines – Lateral – Terminal • Outwash Plain – Drumlins – Eskers – Kettle Lakes

Glacial Cycles • Why Glaciers – Land at the Poles – Global Temperature • Glacial Cycles – Glacial Maximum – Glacial Minimum – Interglacial Periods

Gravity • Slides – Rock – Mud – Avalanche • Slumps • Creep

Key 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