Answer:
South America's geologic structure consists of two dissymmetric parts. In the larger, eastern portion are found a number of stable shields forming highland regions, separated by large basins (including the vast Amazon basin). The western portion is occupied almost entirely by the Andes Mountains.
Explanation:
The population density of Europe, as a whole, is 143 people per square mile. This makes Europe the second most densely populated continent in the world, with the first place being occupied bu Asia, so we can say that Europe is a densely populated continent as a whole.
It has to be taken in notice that Europe is a continent that has an aging population, the fertility rate is very low, and the life expectancy is high. Interestingly enough, even though there's only three countries in the whole continent that have a positive fertility rate, the population of the continent is still growing, slowly, by 0.3% annually, but it is growing. The growth is mainly because of the migrants, mainly from the Middle East and Africa, and apart from increasing the number of the population with their entry, they also tend to have a high fertility rate.
Answer:
The Law of Superposition places the youngest rock on top of older rock, except when faults and igneous rock are present (option 1).
Explanation:
The law of superposition of strata -proposed by Nicolás Steno based on the observations of Avicenna- states that the rock strata observed in the earth's crust are the product of the deposit of rocks progressively over time, leaving the newest rocks in the surface and the oldest in lower strata.
In successive studies and observations made by Steno, this scientist could appreciate the existence of some exceptions to his principle of superposition:
- <em>The presence of geological faults could cause an alteration in the arrangement of the layers, different from the order they should have.
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- <em>Magma activity is a factor that would lead to the deposit of igneous rocks between the layers of already formed rocks.</em>
The Law of Superposition is, in geology, the basis on which the discipline of sedimentary stratigraphy is based.
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The earth was formed at approximately 4.5 Billion BC
