I like to use a meter stick and be very intentional with my spacing to model time as a scale. I also avoid using the far right ... of the Earth that is characteristic of a particular span of geologic ...

Scientists have calculated the Earth to be 4.54 billion years old, with an uncertainty of 50 million years on either side.

THE present short article is a reversion to an aspect of the subject of geologic time which I had thought to be settled, and to require no further research or controversy. In my review of Mr ...

Anything that dropped into the basin, it seemed, would fall till the end of time. Yet when scientists finally looked into the lake’s murky depths, they found not a void, but a mirror.

A recent geologic map addition to get a sense for scale, color and symbology used is the Geologic Map for the State of ...

Smith’s map and ideas paved the way for a better understanding of geological time and laid the founding principles for ... He made his first small-scale attempts to prepare a national geological map ...

A new study reconstructs how an ancient North American rift system was uplifted in space and time due to subsequent continent-continent collision.

Demonstrate the utility of fossil micrometeorites as a climate proxy for Earth’s upper atmosphere composition Investigate how the flux of extraterrestrial dust to earth changed over geological time ...

A group met at the University of Alaska Fairbanks last week to brainstorm a possible new economy for Alaska and clean energy source for the world — geologic hydrogen. We bump into hydrogen every ...

A successor to A Geologic Time Scale 1989 (Cambridge, 1990), this volume introduces the theory and methodology behind the construction of the new time scale, before presenting the scale itself in ...

The authors have been at the forefront of chronostratigraphic research and initiatives to create an international geologic time scale for many years, and the charts in this book present the most up to ...

Geologic mapping has been one of the most fundamental mandates of the U.S. Geological Survey (USGS) since its establishment in 1879. Congress created the USGS to “classify the public lands and ...