"They are making an important point, which is that humans have become a geologic force," said Lonnie Thompson, a professor of geological sciences at Ohio State University, in response to the study.
There is evidence for the recent condensation of ices on the surface of Titan, perhaps by active geologic processes.
At least some of the volcanic activity noted above, particularly that of volcanic island arcs, is evidence that seafloor spreading and crustal subduction were active geologic processes.
Jasper spans 4,200 square miles (10,878 square km) and contains significant active geologic processes, scenic mountains, and diverse animal and plant populations.
Lying on the constantly active geologic border between North America and Europe, Iceland is a land of vivid contrasts of climate, geography, and culture.
In the space of less than 40,000 years, ever more closely packed cultural 'revolutions' have taken humanity from the status of a relatively rare large mammal to something more like a geologic force".
Gordon McConnell, who was senior curator of the Yellowstone Museum in Billings, Mont., said Mr. Stinson showed how "we as humans have become almost a geologic force on the land".
If the clash over rebuilding the nation's nuclear arms complex has an epicenter, it lies in New Mexico on the flanks of an extinct volcano near an active geologic fault that has sent the project's costs spiraling upward.
"Life Story" has the beautiful effect, each time you read it, of making you appreciate and acknowledge each kind of life form in turn, and each kind of atmospheric and geologic force that contributed to its existence.
"This is humanity as a geologic force," Caldeira told the Times.
