What information did geologists use to divide Earth's history into intervals?

Which of the following is a reason why people are vacationing in slovakia

Based on this map, which statement about africa’s economic activity is most accurate? a) coastal countries are all members of opec b) economic development is more common with opec nations c) coastal countries have more access to productive resources d) economic development is more common above the sahara desert

Compare demographic and environmental effects of the columbian