Scientific American talked with Gabbott and Zalasiewicz, authors of the book Discarded: How Technofossils Will Be Our ...

This is the principle of cross-cutting relationships. The principle states that any geologic features that cut across strata must have formed after the rocks they cut through (Figures 2 and 3).

that geological strata associated with these changed conditions are "distinct from Holocene strata"; and that the plutonium concentrations from the stratotype section at Crawford Lake, Canada has ...

“When you start naming geologic-time terms, you need to define what exactly the boundary is, where it appears in the rock strata,” says Whitney Autin, a stratigrapher at the SUNY College of ...

An Index fossil is any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment. We will look at a few index fossils and ...

Smith's colourful and sophisticated geological map was based on his astute observation that rock layers (strata) could be identified by the fossils they contain. He noticed that the layers always ...

A University of Tokyo research team says it has succeeded in collecting microorganisms from two-billion-year-old geological strata in South Africa that may still be alive. If confirmed ...

This is the principle of cross-cutting relationships. The principle states that any geologic features that cut across strata must have formed after the rocks they cut through (Figures 2 and 3).