Prehistoric time line, geologic time scale, photos, facts, maps, and more from National Geographic. Humans have walked the Earth for 190,000 years, a mere blip in Earth's 4.5-billion-year history.

Smith’s map and ideas paved the way for a better understanding of geological time and laid the founding principles for geological surveys worldwide. His concept of using fossils to identify rocks is ...

Introduction to geology field methods including maps, cross sections, navigation ... and analysis of one-dimensional (e.g. time series) and two-dimensional datasets (i.e. spatial data). Techniques are ...

The study introduces two primary models: ・Global Geologic Provinces: These are spatially accurate maps encompassing a uniform set of common geological characteristics, essential for comparative ...