Trilobites were rapidly evolving and widespread marine organisms that spanned a number of geologic time periods. Certain types of trilobites only appeared in specific segments of geologic time; therefore, when one of these trilobites is found, you can be certain that the rock layer it is found in is of a certain geologic age.
Answer:
Explanation:El este y el oeste eran compañeros adoradores de dios, se dicen como compañeros cristianos.
Puedo decir más después
Explanation:
After the 7 years war, Britain and its colonies suffered both political and econimical problems. Britain went into a HUGE debt.
Answer:
La Sumeria es una civilizacion que florecio alrededor de 4500-1900 aC
