Relative dating evaluate geologic time

07-Jun-2016 20:39

By comparing and correlating rock layers from around the world, geologists can put together a full understanding of the order of events from the beginning of our planet’s history until the present.Once we’ve lined them up, the stratigraphic layers of Earth’s crust read like the pages in a book, recording the originations and extinctions of various groups of life, the movement of continents, the rise and fall of mountains, the opening and closing of oceans, the warming and cooling of climate, all documented hundreds of times over in sedimentary pages all over the globe.Every dating approach has its strengths and limits, but the most important feature they all share is that they support each other.Most of the time when scientists are trying to date a new discovery, they will use as many dating approaches as possible.If you know how to look for it, you can find clues about ancient life, climate, landscape, continental movement, and more.Up and down the rock record, the layers change, revealing changing conditions over time.

–Magnetostratigraphy is the science of reading the prehistoric record of changes to the Earth’s magnetic field.

The test could serve as a test of prerequisite knowledge, as a pre-post test in courses emphasizing basic concepts of geologic time, or to compare fundamental knowledge of geologic time between differing groups or within groups longitudinally.