Oceanography Concepts and Features

The lecture covers geological oceanography, focusing on bathymetry, which maps sea floor features. It compares bathymetry to land topography and discusses techniques like echo sounding, multi-beam sonar, and satellite imagery. The lecture also describes deep sea floor features such as continental shelves, slopes, and mid-ocean ridges. It explains marine sediment types and their origins, including lithogenous, biogenous, hydrogenous, and cosmogenous sediments. Finally, it discusses sediment sorting, transport, and deposition using the Wentworth scale.

What is the primary focus of bathymetry?

• Studying ocean currents

• Measuring water temperature

• Mapping the sea floor

• Analyzing marine life

Which technology uses sound to measure sea floor depth?

• Thermal imaging

• Satellite imagery

• Rope measurement

• Echo sounder

What is the continental shelf?

• A deep ocean trench

• A flat area near the coastline

• An underwater mountain range

• A steep slope leading to the ocean floor

Which feature is an underwater mountain range with a rift valley?

• Seamount

• Trench

• Mid-ocean ridge

• Abyssal plain

What type of sediment originates from land and is carried to the ocean?

• Biogenous

• Lithogenous

• Hydrogenous

• Cosmogenous

Which sediment type is formed from the remains of marine organisms?

• Hydrogenous

• Lithogenous

• Cosmogenous

• Biogenous

What does the Wentworth scale classify?

• Ocean currents

• Water temperature

• Sediment size

• Marine life

What does a well-sorted beach indicate?

• Presence of large rocks

• Uniform sediment size

• High water temperature

• Varied sediment sizes

What does the Holster diagram illustrate?

• Water salinity

• Marine biodiversity

• Sediment movement

• Ocean currents

What is the significance of understanding geological oceanography?

• Predicting weather patterns

• Studying marine life behavior

• Mapping land topography

• Understanding sea floor features and sediment types