He concluded, the bottom most layers were deposited first, thus making them the oldest and subsequent layers were progressively younger in age.
NSF Postdoctoral Research Fellow at Stony Brook University.
I study how bone tissue, growth, and metabolism evolve at macroevolutionary time scales. Exploring this series of exhibits will take you on a journey through the history of the Earth, with stops at particular points in time to examine the fossil record and stratigraphy.This lesson is based on an online booklet that provides an introduction to the study of earth's history, published by the USGS.Using careful analogies and written historical records, the authors help students understand the development of the geologic time scale, including how this depended on gathering evidence and making comparisons.When Geologists and other scientists refer to the age of the Earth, they are using one of two methods to determine this.
First, we must understand they are dating the rocks and other materials found on the Earth to determine this.
There are two basic types of dating methods geologists rely on, Relative Time Dating and Absolute Time Dating.
In Relative Time dating a specific age in years is not given.
To help students understand the development of the geologic time scale.
Also, to introduce students to the major time periods in earth's history, as well as to the role fossils play in helping us understand this history.
The geologic time scale is the “calendar” for events in Earth history.