Harmer; (4) The Pleistocene Period in the Eastern Counties ... by Mr. J. A. Douglas. Geology in the Field. The Jubilee Volume of the Geologists' Association (1858–1908). Edited by H.

As a period of geologic time, the boundaries of the Triassic are defined on the basis of rocks and the fossil record. It was the German geologist Friedrich August von Alberti who first marked the ...

John Wesley Powell A professor of geology at Illinois Wesleyan ... A shallow sea advances and retreats several times during this period, leaving behind the layers named Kaibab Limestone, Toroweap ...

A new study provides compelling new evidence that a colossal 'megaflood' refilled the Mediterranean Sea, ending a period during which the Med was a vast expanse of salt flats. The study suggests the ...

And this might have changed Earth’s climate and geological history forever. Around 466 million years ago, during a period ...