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PALEONTOLOGY, AND in particular the study of dinosaurs, is an exciting topic to people of all ages.Although most attention in today's world focuses on dinosaurs and why they became extinct, the world of paleontology includes many other interesting organisms which tell us about Earth's past history.Absolute dating, on the other hand is capable of telling the exact age of an item using carbon dating and many other techniques that were not there in earlier times.Relative dating makes use of the common sense principle that in a deposition of layers.

Two broad categories of classification methods are relative dating and absolute dating.This is a method that does not find the age in years but is an effective technique to compare the ages of two or more artifacts, rocks or even sites.It implies that relative dating cannot say conclusively about the true age of an artifact.Sequencing the rock layers will show students how paleontologists use fossils to give relative dates to rock strata.Once students begin to grasp "relative" dating, they can extend their knowledge of geologic time by exploring radiometric dating and developing a timeline of Earth's history.The study of fossils and the exploration of what they tell scientists about past climates and environments on Earth can be an interesting study for students of all ages.Teaching about Earth's history is a challenge for all teachers.Lecture 10 Stratigraphy and Geologic Time * Stratigraphy * Basic principles of relative age dating * Unconformities: Markers of missing time * Correlation of rock units * Absolute dating * Geologic Time How old is the Earth? Interpreting Earth history is a prime goal of geology.Some knowledge of Earth history and geologic time is also required for engineers in order to understand relationships between geologic units and their impact on engineering construction.* Stratigraphy Stratigraphy is the study of rock layers (strata) and their relationship with other other.Stratigraphy provides simple principles used to interpret geologic events as discussed below.