For each cross section list the order of events that occurred to form the rocks illustrated.
Rock units depend on the environment of deposition, which varies from one location to another.
The main rock unit of stratigraphy is the formation, a localized and distinctive (easily recognizable) geologic feature (i.e., the Chinle Formation of Late Triassic lake and river deposits in Arizona, Nevada, Utah, and New Mexico).
Teaching about Earth's history is a challenge for all teachers.
Time factors of millions and billions of years is difficult even for adults to comprehend.
The activities are designed to enhance an existing curriculum and include online assessments.
They can be used by students ranging from middle school, high school, or college classrooms.At a particular location, the rocks never fully represent the entire geologic rock column due to extensive erosion or periods of non-deposition or erosion.For example, rocks named Juras (for the Juras Mountains) in France and Switzerland were traced northward and found to overlie a group of rocks in Germany named Trias.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.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.The Trias rocks in turn, were found to underlie rocks named Cretaceous in England (the chalky White Cliffs of Dover).n 1835, Adam Sedgwick (Britain) and Roderick Murchison (Scotland) decided to name the entire succession of sedimentary rocks exposed throughout Europe.