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North America

A dog sits next to a backpack on a dirt road in a desert landscape.
Posted inFeatures

Incredible Journeys on the Crown of the Continent

by Mary Caperton Morton 15 April 202215 April 2022

Living in Geologic Time: The making, breaking, and backpacking of North America’s Continental Divide.

Posted inEditors' Highlights

What Caused the Open Habitat Transition in the West-Central U.S.?

by Susan Trumbore 10 March 202212 April 2022

Between 26-15 My ago, forests covering west-central North America gave way to open, grassy habitats. Now, oxygen isotope records suggest this shift is owed to drier winters and increased aridity.

Dry Falls located at the head of Grand Coulee
Posted inResearch Spotlights

Western U.S. “Megafloods” Might Not Have Been So Mega

by Rebecca Dzombak 3 February 20223 February 2022

The flooding that carved eastern Washington State 20,000 to 12,000 years ago could have been 80% smaller than the canyons’ volume today.

The coastline of Nova Scotia in eastern Canada
Posted inResearch Spotlights

The Role of Magma in the Birth of the Atlantic Ocean

by Jack Lee 25 January 202225 January 2022

High-resolution seismic models of the Nova Scotia margin reveal a role for magmatism in continental breakup, even at magma-poor sections of the eastern North American margin.

An aerial view of Vancouver
Posted inNews

Crowdsourced Science Helps Map Vancouver’s “Smellscape”

by Brittney J. Miller 14 December 202121 March 2022

Exposure to stinky odors can affect human health, but quantifying smells can be difficult.

An icy Arctic vista is seen from a slight elevation. The landscape contains patches of white ice and randomly positioned pools of meltwater. Four scientists, small and seen from a distance, stand on the ice on the right side of the image.
Posted inNews

Melting Arctic Sea Ice Strengthens Tides

by Kimberly M. S. Cartier 21 October 202124 January 2022

If climate change throws off the seasonal freeze-thaw cycle of Arctic sea ice, it could trigger a reinforcing cycle of sea ice melt in parts of the Canadian Arctic.

Photograph of The Great Unconformity visible in The Grand Canyon
Posted inEditors' Highlights

The Great Unconformities?

by P. van der Beek 3 August 20213 May 2022

New thermochronology data and thermal history modeling from the Canadian Shield show that the Great Unconformity formed there later than elsewhere in North America and may represent another event.

The research vessel CCGS Hudson in Southwind Fjord, Baffin Island, with the iceberg that initiated a submarine landslide in the background.
Posted inNews

An Iceberg May Have Initiated a Submarine Landslide

by Andrew Chapman 20 July 20216 December 2021

A new study shows that icebergs may initiate submarine landslides when they collide with the seafloor.

Isolation lake in northwestern Scotland
Posted inNews

An Ancient Meltwater Pulse Raised Sea Levels by 18 Meters

by Tim Hornyak 2 June 202118 November 2021

Meltwater pulse 1A, a period of rapid sea level rise after the last deglaciation, was powered by melting ice from North America and Scandinavia, according to new research.

Several Velella velella on the beach
Posted inNews

Why Trillions of Jellyfish Washed Ashore from Canada to California

by Jenessa Duncombe 31 March 20216 December 2021

Although warming oceans may make population booms and mass strandings more common, the species may ultimately be one of the beneficiaries of climate change.

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