Unit 2407: Marine Geology

1. Introduction to Marine Geology

• Definition and scope of marine geology
• Importance of studying the Earth's crust beneath oceans
• Overview of oceanic environments (continental shelves, slopes, abyssal plains)
• Geological processes shaping the underwater landscape (sedimentation, volcanism, tectonics)

2. Plate Tectonics and Seafloor Spreading

• Fundamentals of plate tectonic theory
• Types of tectonic plates and plate boundaries
• Formation of ocean basins and mid-ocean ridges
• Mechanisms of seafloor spreading
• Subduction zones and ocean trenches
• Evidence supporting plate tectonics (magnetic anomalies, age of oceanic crust)

3. Marine Sedimentation

• Classification of marine sediments:
  • Terrigenous sediments
  • Biogenous sediments
  • Hydrogenous sediments
  • Cosmogenous sediments
• Sources and transport mechanisms
• Sediment deposition processes and environments
• Sediment distribution patterns in different oceanic settings

4. Coastal Geology

• Coastal landforms: beaches, cliffs, estuaries, deltas
• Marine processes influencing coastal geology: waves, tides, currents
• Coastal erosion and sediment transport
• Sea level changes and their geological implications
• Human impacts on coastal zones

5. Marine Volcanism and Hydrothermal Vents

• Formation and characteristics of underwater volcanoes and seamounts
• Hydrothermal vent systems: formation and chemistry
• Biological significance: unique ecosystems and extremophiles
• Geological and ecological importance of hydrothermal vents

6. Marine Geohazards

• Tsunamis: causes, propagation, and impact
• Submarine landslides and sediment failure
• Earthquake generation in marine environments
• Risk assessment and mitigation strategies for coastal areas

7. Marine Geophysical Techniques

• Bathymetry: mapping seafloor topography
• Seismic reflection and refraction profiling
• Side-scan sonar imaging
• Remote sensing applications (satellite imagery, acoustic methods)
• Data interpretation and integration

8. Marine Resources and Mining

• Types of marine resources: oil, gas, minerals, aggregates
• Exploration techniques and extraction methods
• Environmental impacts of offshore drilling and deep-sea mining
• Regulations and sustainable practices

9. Climate Change and Marine Geology

• Marine geological evidence for past climate change (sediment cores, isotope analysis)
• Sea level fluctuations through geological time
• Impact of climate change on marine ecosystems (coral reefs, polar regions)
• Human activities and their geological consequences
• Future outlook and research directions