Compare and contrast relative age dating with radiometric dating
Compare and contrast relative age dating with radiometric dating - updating gridview
There is an intimate coupling between the movement of the plates on the surface and the convection of the mantle (that is, the heat transfer caused by bulk movement of molecules within fluids).Thus, oceanic plates and the adjoining mantle convection currents always move in the same direction — because the oceanic lithosphere is actually the rigid upper thermal boundary layer of the convecting mantle.
In practical terms, geology is important for mineral and hydrocarbon exploration and exploitation, evaluating water resources, understanding of natural hazards, the remediation of environmental problems, and providing insights into past climate change.More recently, seismologists have been able to create detailed images of wave speeds inside the earth in the same way a doctor images a body in a CT scan.These images have led to a much more detailed view of the interior of the Earth, and have replaced the simplified layered model with a much more dynamic model.Geology describes the structure of the Earth beneath its surface, and the processes that have shaped that structure.It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks.To study all three types of rock, geologists evaluate the minerals of which they are composed.
Each mineral has distinct physical properties, and there are many tests to determine each of them.
By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth.
Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates.
Transform boundaries, such as the San Andreas Fault system, resulted in widespread powerful earthquakes.
Plate tectonics also has provided a mechanism for Alfred Wegener's theory of continental drift, in which the continents move across the surface of the Earth over geologic time.
The specimens can be tested for: In the 1960s, it was discovered that the Earth's lithosphere, which includes the crust and rigid uppermost portion of the upper mantle, is separated into tectonic plates that move across the plastically deforming, solid, upper mantle, which is called the asthenosphere.