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The index fossils are fossils that are found in the rock strata of certain geologic period, but they are also fossils that are very common and can be found in numerous places around the globe.
Because they can be found all over the globe, and they are indicative of certain geologic period, the geologists have started to use them as a simple way of determining the age of the rock strata. While this method can not provide the geologists with an accurate year for the formation of the rocks, it is still able to determine the relative age of the rocks. By determining the relative age with such ease by using the index fossils, the geologists are able to immediately make conclusions about the rock strata, have basic information about it, and largely be aware of the processes that formed them and influenced them.
EQUINOX occurs then; when days and nights are equal
The best and most correct answer among the choices provided by the question is the fourth choice. Geothermal energy benefited Japan by transforming heat energy to electrical energy to be consumed by homes and industries. <span>I hope my answer has come to your help. God bless and have a nice day ahead!</span>