Global Warming

 

1-Describe radiometric dating and discuss three prerequisites that must be met in order to obtain a reliable radiometric date on a granite batholith. What are the various methods of radiometric dating that may be used?

2-Name the three major types of unconformities and describe a sequence of events that might produce each. Be specific and include rock types and processes that each includes. What does this tell you about the events that occurred during the gap in the rock record?

 

Sample Solution

Global Warming

Radiometric dating calculates an age in years for geologic materials by measuring the presence of a short-life radioactive element, for example, carbon-14, or a long-life radioactive element plus its decay product, e.g., potassium-14/argon-40. In order for a reliable radiometric date to be obtained for a granite batholith, three prerequisites must be followed: the rate of decay must remain constant, the amount of parent and daughter must remain completely precise, and the granite would have to have stayed a closed system for the entire period of time from the time of its formation. Among the best-known techniques are radiocarbon dating, potassium-argon dating and uranium-lead dating.

countries. ‘Free trade area covers all manufactured and agricultural products, although the timetables for reducing tariffs and removing quantitative restrictions and other non-tariff barriers differ, (Association of South Asian Nations, 2009 update on free trade). Due to entry of various industries in the market, infrastructures are improved in collaboration of state’s government and the industries for their market accessibility. Improvement of infrastructures such as roads, railways, communication, electricity, and social amenities by these industries serves as a gateway to developments in these countries. Increased developments results to increase in investments and thus a country realize its development goals of. Although a country does not benefit directly through revenues from tariffs and taxes, the industries help it to meet its development goals. , its development vision is addressed. Improvements of infrastructure such as transport, electricity and social amenities results to improvement of investment capacities of regions and countries, which in turn contribute to economic growth (Jovanovic??, 2013 p. 971). Policies that lift barriers on export and imports by lowering or elimination tariffs and duties encourage export and import of both goods and services to across the region. Developing countries are able to gain revenues from exports while imports supply them with necessary services and goods that are important in steering economic development. For example the European Economic Community elimination of import and export tariffs for its member states encouraged free movement of goods and services across the region in a common market (Bento, 2009 p. 73). Therefore, free trade has contributed greatly to development of small nations through improved trade that encourages export of goods and services without barriers.

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