Coral reefs provide an important ecosystem for life underwater, protect coastal areas by reducing the power of waves hitting the coast, and provide a crucial source of income for millions of people. Coral reefs teem with diverse life. Thousands of species can be found living on one reef.
Answer: Libyan Desert<span> and the Nubian </span><span>Desert .
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Answer:
Superposition --- C. the oldest is on the bottom, the youngest on top.
Cross-cutting relationships --- B. faults, fractures are younger than the rocks they cut through.
Unconformities -- D. missing time
Original horizontality -- A . sedimentary layers/lava flows are deposited in flat layers.
Explanation:
- The superimposition is the layering of the older beds of the sedimentary rocks and has a series of a layer of the lava flows with the oldest layer at the bottom and the youngest at the top.
- The cross-cutting is the principle of geology that states the which feature cuts the another or the younger of them and is a relative dating technique.
- An unconformity is a buried erosional or a non-depositional surface that is separating the two rocks masses or the stratas and thus indicates that the sediment deposits were not continuous.
- The principle of the horizontality states that the layer of the sediments is originally deposited horizontally under the action of gravity a thus this analysis helps in the folded and tilted strata.
At its greatest extent, the Arab Empire controlled 3/4 of the Mediterranean region, the only other empire besides the Roman Empire to control most of the Mediterranean Sea. The Mediterranean Sea was important to the Roman Empire in that it was a vital trade link with other parts of the Empire, especially the Middle East and North Africa. As Rome grew, it needed the grains and other food from the Levant, and African animals were considered status symbols in the Roman royal courts.
