Paleontology relative dating
Now imagine that you come upon a formation like this: What do you think of it? How can you make any conclusions about rock layers that make such a crazy arrangement?
Geologists establish the age of rocks in two ways: numerical dating and relative dating.
Imagine that you're a geologist, studying the amazing rock formations of the Grand Canyon.
Your goal is to study the smooth, parallel layers of rock to learn how the land built up over geologic time.
Let's say, in this set of rock strata, that we found a single intrusion of igneous rock punching through the sedimentary layers.
Paleontology, also spelled palaeontology, scientific study of life of the geologic past that involves the analysis of plant and animal fossils, including those of microscopic size, preserved in rocks.
It is concerned with all aspects of the biology of ancient life forms: their shape and structure, evolutionary patterns, taxonomic relationships with each other and with modern living species, geographic distribution, and interrelationships with the environment.
Paleontology is mutually interdependent with stratigraphy and historical geology because fossils constitute a major means by which sedimentary strata are identified and correlated with one another.
Its methods of investigation include that of biometry (statistical analysis applied to biology), which is designed to provide a description of the forms of organisms statistically and the expression of taxonomic relationships quantitatively.