We will look at a few index fossils and see if we can figure out the order they would fall on the geologic timescale. Make a timeline for each group and one for the teacher demo. I have done this with ...

Scientists have discovered an anomaly related to the increase in the level of beryllium-10 in ocean sediments at the bottom ...

Scientists have identified an anomaly linked to the rise in beryllium-10 levels in ocean sediments on the Pacific Ocean floor ...

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.

There are three general approaches that allow scientists to date geological materials and answer the question: "How old is this fossil?" First, the relative age of a fossil can be determined.

Understanding Earth's Deep Past provides an assessment of both the demonstrated and underdeveloped potential of the deep-time geologic record to inform us about the dynamics of the global climate ...

Geologic Time is a crucial concept to understanding the history of the earth—including the evolution of life. Many different representations of the timeline have been created, and many approaches ...