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social studies 6th
Louisiana Geology Part 2
| Question | Answer |
|---|---|
| ________________ is the loss of coastal land | coastal erosion |
| On average, an area the size of two _____________________ disappears every hour. | Football field |
| List three things that cause coastal erosion Louisiana | 1. land sinks faster than new sediment is deposited 2. ocean waves and hurricans erode the land 3. human interference built levees that stop deposit of sedimant |
| It has been estimated that it will take over _____________ dollars to slow erosion. | 14 billion |
| _________________ is when saltwater from the gulf moves into the marshes. | saltwater intrusion |
| Due to the search for ___________ canals and pipelines have been constructed through the marshes | oil |
| The search of oil allows saltwater intrusion which __________ marsh grasses | kills |
| Grasses are being planted in some areas to hold _________ in place. | soil |
| _____________ is being pumped into barrier islands to keep them from eroding away. | sand |
| _________________ projects have benn completed that allow Mississippi River water to reach coastal marshes. | diversion |
| All native rock in Louisiana is ________________ rock. | sedimentary |
| Sedimentary rock is formed in _____________ from compresssed _____________________. | layers sediment |
| Geologists believe that most Louisiana rock formed between _______ and ___________ million years ago. | 2 and 66 |
| The land is oldest in _________________ Louisiana | north |
| Louisiana has a few hills formed from _________ and ____________ forces | magma tetonic |
| ___________ is molten rock deep underground. | magma |
| The molten rock (magma) deep under ground exerts ________________ on the earth's crust. | pressure |
| _____________________ forces are created when land masses split apart and collide back together | tetonic |
| ______________ are an underground water reservoir. | aquifers |
| As sedimants deposits slowly build up the land, ________________ sometmes becomes trapped between two layers of sediment. These are called ___________. | fresh water aquifers |
| The depth at which the water is located is called ________________ | water table |
| There is a large aquifer called the _______________ that people in North Louisina use. | sparta aquifer |
| List three ways we use the Sparts Aquifer | 1. drinking water 2. irrigation 3. industery |
| We are drawing out more water than we are ______________. | replacing |
| If the Sparta Aquifer runs ___________ it will be a major problem. | dry |
| ________________ is a tall, vertical column of salt squeezed up through the gound by extreme pressure. | salt dome |
| Louisiana has _____________ of salt domes. | hundreds |
| Salt domes in Louisiana appear as wooded ______________ jutting out of the marsh. | hills |
| Some of these domes are called__________________. | island |
| ____________________ is an example of a salt dome. | avery island |
| ____________ is one of Louisiana's important industeries. | salt mining |
| The second largest salt mine in the world is in __________________. | belle isle |
| _____________ is used to make acids, fertilizer, rubber, paper, and many other products. | sulphur |
| Sulphur forms when salt is dissolved and bits of _____________ are left behind. These attacked by ______________ which turn them into sulphur | mineral bacteria |
| _______________ cannot penetrate salt so it became trapped in pockets of sand next to salt domes. | oil |
| Some of Louisiana's richest oil fields are by _____________________. | salt dome |
| _________________ is found in ancient floodplains. Dolet Hills near _______________ contains large amounts of coal. | coal mansfield |
| ______________ are a fracture in earths crust | faults |
| In some places the earth weakens and slides towards the gulf of Mexico.____________________ can occur along these fault lines. | earth quakes |
| Although most people don't know it, Louisiana has ____________ earthquakes. They are small and go unnoticed. | frequent |
Created by:
Ouellettegirls