The topmost layer of the earth (aside from the atmospher) would be the crust. It is made up of tectonic plates that move in different directions. The collisons and abrasions made by these plates sliding and crashing into each other means that mountain ranges pop up like wrinkles, and continents can move around over time. This happens over millions of years.
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When scientists use the law of superposition to determine the age of a fossil, they go by the principle of 'every undisturbed layer of rock is older than the layer above it. This is not the most precise way of determining age, and in fact this method can only reveal the approximate age, but not the exact one.
Answer - The Czech Rebublic
As of January 1, 1993 due to the period of great ethnic tumoil in <span>Czechoslovakian region, it was splited into </span>Slovakia and Czech Republic. After the split, the new Czech republic was faced with <span>the threat of invasion by Slovakia.</span>
