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15 January 2019

New research shows significant decline of glaciers in Western North America

The first comprehensive assessment of glacier mass loss for all regions in western North America (excluding Alaskan glaciers) suggests that ice masses throughout western North America are in significant decline: glaciers have been losing mass during the first two decades of the 21st century.

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16 October 2018

Scientists find missing piece in glacier melt predictions

A new method for observing water within ice has revealed stored meltwater that may explain the complex flow behavior of some Greenland glaciers, an important component for predicting sea-level rise in a changing climate.

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2 October 2018

Tracking exploding ice cracks on Himalayan glaciers

In 2017, Evgeny Podolskiy spent more than a week trekking through the Nepalese Himalayas to test the seismic activity of the Trakarding-Trambau Glacier system. In October, the research team and a group of sherpas and porters traveled to an open, debris-free glacier about five kilometers (3.1 miles) above sea level, in full view of Mount Everest.

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16 August 2018

Acceleration of mountain glacier melt could impact Pacific Northwest water supplies

Seasonal snow and ice accumulation cause glaciers in the Cascade Range mountains to grow a little every winter and melt a little every summer. This annual melt provides water for much of the Pacific Northwest, which includes Washington, Oregon, Idaho and parts of Montana. Inhabitants of the region utilize this water for drinking, crop irrigation, generating hydroelectric power and other uses. Glacier melt provides supplementary water when less snowmelt is available, alleviating drought conditions or other impacts of dry periods.

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15 September 2015

Monday Geology Picture: Glacial Erratic Boulder, New Hampshire

I’m visiting family in New Hampshire at the moment… and also spending a little time with my favorite glacial erratic. I’ve posted about this particular glacial erratic before here and here. For this week’s Monday Geology Picture post I thought I’d share another shot of this stunning glacially deposited boulder. Enjoy!

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29 September 2014

Monday Geology Picture: U-Shaped Glacial Valley, Seward Peninsula, Alaska

When glaciers erode landscapes, they often leave behind characteristic U-shaped valleys. This week’s Monday Geology Picture shows a U-shaped glacial valley on the Seward Peninsula in Alaska. This valley is located just outside of the gold mining town of Nome. Does anyone else have good pictures of U-shaped valleys?

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25 September 2014

Sutherland Sky: Part VI – Dwyka Diamictite

At long last, I’m finishing up my series of posts about my October 2013 visit to the small town of Sutherland in South Africa’s Northern Cape province. Sutherland is home to a South African Astronomical Observatory (SAAO) research station that contains many telescopes, including the Southern African Large Telescope (SALT). You can read Part I of this series here, Part II of this series here, Part III of this series here, Part IV of this series here, and Part V of this …

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28 October 2013

Monday Geology Picture: Blackstone Glacier, Prince William Sound, Alaska

This week’s picture was taken by my husband Jackie in Prince William Sound, Alaska, back in early September. Jackie and I spent about two months working in Alaska earlier this year. After our work, I went to visit my family in New Hampshire for a few days while Jackie stayed behind with a colleague to pack up gear and such. Just before flying home to South Africa, Jackie and the …

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9 September 2013

Monday Geology Picture(s): More Glacial Erratics on the Lake

Last week, I shared a picture of me sunbathing by my favorite glacial erratic, which is located near the Mervine Family Cabin on Franklin Pierce Lake in New Hampshire. This week, I thought I’d share a few more pictures of glacial erratics on Franklin Pierce Lake. Note the large sizes of these erratics and also how many of them are fairly angular. The erratics are mostly igneous and metamorphic rocks, …

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5 February 2013

LASI V: Fire and Ice– Antarctic Glaciovolcanism Provides Clues to Past Climate

Note: Dr. Sergio Rocchi, an associate professor at the University of Pisa in Italy, presented a talk, “Intravolcanic sills, lava flows, and lava-fed deltas (Victoria Land, Antarctica): Paleoenvironmental Significance” at the LASI V workshop in Port Elizabeth, South Africa in October 2012. The article below is based on this talk and also an interview with Dr. Rocchi. Over a few weeks, I am highlighting some of the research that was …

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16 December 2012

Geology Word of the Week: G is for Glacial Erratic

def. Glacial Erratic: A rock which has been transported and deposited by a glacier and which has a different lithology than the rock upon which it has been deposited. Often, erratic rocks have an angular shape because they were broken off of bedrock by glaciers and have not yet had time to be weathered and rounded by water, wind, and other erosional forces. Glacial erratics can range in size from very …

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