Olivia channelFrom Southwark (London)
Relative age dating also means paying attention to crosscutting relationships. Next time you find a cliff or road cutting with lots of rock strata, try working out the age order using some simple principles: Sedimentary rocks are normally laid down in order, one on top of another. You'll read about the commonsense principles of relative dating and work with them in this study guide-principles of uniformitarianism, superposition, original horizontality, continuity, cross-cutting relations, inclusions, baked contacts, and fossil succession. The two most significant principles are: Original horizontality.
Now the problem was how to measure it. Absolute geologic age refers to how long ago a geologic event occurred or a rock formed, in numeric terms, such as The concept is considered by uniformitarian geologists to be a major breakthrough in scientific reasoning by establishing a rational basis for relative time measurements. Relative dating is based on the application of several commonsense principles; numerical dating requires more science.