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Module 10 Vocab
Apologia Marine Biology
| Term | Definition |
|---|---|
| estuary | a semi-enclosed area at the mouth of a river where fresh water and seawater meet and mix |
| ice age | a period in the earth's history when the average temperature of the earth was significantly cooler than it is now |
| glaciers | moving sheets of ice that flow across land |
| uniformitarians | scientists who believe that there were many ice ages in the earth's history and each of them took a long time to occur |
| catastrophists | scientists who believe that there was one major ice age in the history of the earth and it was brought on by the worldwide Flood of Noah's time |
| drowned river valleys | the most common of the five types of estuaries (sometimes called coastal plain estuaries) |
| bar-built estuary | another type of estuary developed because of a sand bar or barrier island |
| fjord | a type of estuary that is the result of glaciers cutting deeply into the earth as they moved near the coast |
| river delta | a fan-shaped estuary where a river reaches the sea and deposits sediment along the coast |
| tectonic estuary | a type of estuary formed as the result of motion in the earth's crust |
| salt wedge | a diagonal delineation of salinities that happen where seawater & fresh water meet |
| euryhaline | species that can tolerate a wide range of salinities |
| stenohaline | species that can tolerate a narrow range of salinities |
| brackish | water that is less salty than seawater but saltier than fresh water |
| wetlands | estuarine areas of high elevations that are periodically covered with water |
| salt marshes | temperate wetlands in temperate areas of the world and are wet, grassy areas |
| mangrove forests | wetlands that you will find in tropical climates |
| mudflats | wide expanses of an estuary that are exposed during low tide |