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LA History Ch1
Question | Answer |
---|---|
What is Pangea | Super continent containing all landforms on earth |
Fact about a landform (sedimentary rock) | only type of rock found naturally in LA |
Fact about a landform (brackish water) | mixture of salt and freshwater |
Fact about a landform (mudlumps) | Found in Mississippi River delta |
What is a salt dome? | An area where ancient sees dried up and lie about 10 miles below ground and appear as wooded hils |
How important are the salt mines to our state? | one of LA's most important industries |
what is another use for salt domes once the salt is gone? | storage sites for oil since it is dense and oil can't penetrate |
fact about the Louisiana marshland | largest marshland in U.S. |
fact about the Louisiana marshland | wet grasses and deposited sediment |
where does sedimentary rock form and how is it formed | formed under the tremendous weight of the layers |
2 factors that cause erosion | humans, wave action |
2 factors that slow erosion | grasses have been planted, sand pumped back into barrier islands |
3 resources our state has | coal, oil, sulphur |
5 islands that are home to salt domes in our state | Jefferson, Avery, weeks, cote blanche, belle |
how do barrier islands protect Louisiana's mainland from erosion | absorb storms, protect from erosion, block salt water from entering marshlands during storms |
T/F our state has the largest marshland area in the U.S. | True |
T/F the mouth of the Mississippi River was once located in what is now Arkansas | True |
T/F earthquakes do not occur in our state | False |
T/F belle island is the second largest salt mine in the world | True |
T/F an underground earthquake that causes big waves, destruction and death is a fault | False |
T/F one major industry in our state is salt mining | True |
T/F Fan shaped landforms called deltas are made when a river connects with an ocean | True |
T/F the study of the sea is called geology | False |
T/F rivers usually flow in a straight line | False |
T/F the red river has followed the same course for centuries | False |
T/F Pangaea was the original for south American | False |
T/F there are many species of animals on a barrier islands | True |
T/F glaciers once covered LA | True |