Sentences with phrase «erosion rates about»

Moreover, a jump in the region's erosion rates about a million years ago coincides with a transition to more powerful ice ages — a sign that climate change can have a larger than expected effect in tearing down mountains.

Not exact matches

The scientists made a startling discovery: rates of hillslope erosion before European settlement were about an inch every 2500 years, while during the period of peak land disturbance in the late 1800s and early 1900s, rates spiked to an inch every 25 years.

Then, about 8,200 years ago, temperatures began to cool rapidly and erosion rates increased again.

You know nothing about erosion rates.

Mars and Housenecht at U.S.G.S. in a 2007 Geology paper looked at Landsat imagery that suggested that erosion rates between 1985 - 2005 were about twice the rates documented between 1955 - 1985; more recently Ben Jones at U.S.G.S. has suggested in a paper in review that rates over just the past decade are faster and more uniform than historical rates.

In a telephone interview from India, where she was about to visit some Himalayan glaciers, Dr. Koppes noted that the highest rates of erosion by rivers and glaciers occur in areas of tectonic uplift — where the land is still rising.

Then, about 8,200 years ago, temperatures began to cool rapidly and erosion rates increased again.

After the Holocene Optimum ended about 5,000 years ago and sea level rise slowed, California's current rate of coastal erosion decreased to about 10 to 30 cm / year.