A fresh analysis of rocks from one of these periods, the Ediacaran (about 630-540 million years ago), aims to solve a ...

A group of scientists has chosen a small lake near the U.S.-Canada border as the site that best represents the Anthropocene Epoch—a proposed period of geologic time marked by humans’ drastic impact on ...

The outcroppings of rock along Duck Creek contain rocks from two different geologic periods. The limestones and dolomitic limestones are from the Devonian Period and represent geologic time from ...