Sequence of Sea Level Rise Reflecting Advance and Retreat of Ice

Question 1

STAGE 1.

6

Answer 1

• Climate gets colder.
• Increase in precipitation falls as snow.
• Eventually, snow turns into glacial ice.
• Ice/snow as a store for water. Hydro cycle slows down.
• Sea levels falls affecting world.
• Eustatic fall.

Question 2

STAGE 2.

3

Answer 2

• Weight of ice causes land to sink.
• Affects only some coastlines.
• Movement is isostatic.

Question 3

STAGE 3.

4

Answer 3

• Climate gets warmer.
• Ice masses begin to melt.
• Sea levels rise world wide - eustatic.
• Floods lower parts of land, producing submergent features. eg rias, fjords.

Question 4

STAGE 4.

Answer 4

• Ice moved from some areas, land moves back to previous levels - isostatic readjustment.
• Isostatic movement is faster than eustatic - emergent features are produced eg raised beaches.
• Isostatic recovery affects different places in different ways.