Sentences with phrase «ice age glaciers covering»

Scientists used to think that ice age glaciers covering northern Europe had prevented fish from colonizing the continents» caves.

Not exact matches

There are native earthworms in North America, but not in regions that had been covered in glaciers during the Ice Age.

The local diversity and unique geologic history (covered by neither glaciers nor oceans for the past 225 million years, the Ozarks provided refuge for migrating species during the Ice Age) explain the richness of the lichens here: some 600 named species, along with 30 recently discovered ones awaiting their official designation.

During ice ages, glaciers scour and cover large swaths of land, wiping out plant communities for millennia.

From the shoreline, the open ground swells into low hills, some covered by lichens, some scraped bare by Ice Age glaciers.

For most of the last ice age, enormous glaciers covered western Canada.

After an extreme ice age known as snowball Earth, in which glaciers extended to the tropics and ice up to a kilometre thick covered the oceans, the melted ice formed a thick freshwater layer that floated on the super-salty oceans.

After that heyday, the bears must have been split up into small, isolated populations — genetic bottlenecks — perhaps as they sought refuge on islands and other areas not covered by advancing glaciers during the most recent ice age.

Last I heard, Antarctica still is ice - covered and there are still glaciers in the northern hemisphere; so, the Quaternary Ice Age lives on, by definitiice - covered and there are still glaciers in the northern hemisphere; so, the Quaternary Ice Age lives on, by definitiIce Age lives on, by definition.

But the world was only about 4 °C to 7 °C cooler, on average, during the last ice age, when large parts of Europe and the United States were covered by glaciers.

The geophysical record of the Earth tells the story of warm periods and huge dinosaurs that once flourished and then perished and ice ages and long periods when mile - deep glaciers covered the lands.

During the last ice age much of the northern hemisphere was covered in ice and glaciers, and, as this map from the University of Arizona shows, they covered nearly all of Canada, much of northern Asia and Europe, and extended well into the United States.»]

6 Ice age — time in the past when continental glaciers covered large parts of Earth's surface Global warming — a gradual increase in the temperature of Earth's atmosphere Greenhouse gas — Gases in the atmosphere, such as carbon dioxide, that trap solar energy Ozone hole — a large area of reduced ozone concentration in the stratosphere, found over Antarctica Chlorofluorocarbon — chlorine compounds that are the main cause of ozone depletion KEY TERMS

The current interglacial period is getting long in tooth so again by any sane measure we should be worried about an impending ice age and if there is any merit whatsoever in anthropogenic global warming we should be glad for it and try to get as much of it as we can in the hope that it might delay the inevitable return of glaciers a mile thick covering everything north of Washington, D.C.