1. Topic: The Sea Also Rises Changes in Sea Level Broadcast 6: February 21, 2001 Mrs. Joan Linsley

2. Sea Level Sea Level: the height of the surface of the oceans –As sea level rises, more land is submerged. –As sea level drops, more land is exposed Eustatic Sea Level Change: changes in sea level that occur worldwide at approximately the same time

3. Mean Sea Level Mean Sea Level (MSL): Value based on average ocean surface height Factors that vary Sea Level: –variations in basin size –changes in oceanic volume –ocean currents –Earth’s rotation –waves –tides –air temperature/pressure differences –ocean temperature variation –variations in Earth’s gravity

4. Sea Level Change: Texas Approximate Coastline 65 Million Years Ago 100 Miles

5. Sea Level Changes

6. Falling Sea Level Growing Reef Creates Limestone Sea Level Fall Dolostone Created During Exposure Rock Record

7. Rising Sea Level New Growing Reef Creates Limestone Sea Level Rise Rock Record Dolostone

8. Time For…. Ask a Question!!