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September 15, 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!
September 29, 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?
September 25, 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 …
October 28, 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 …
September 9, 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, …
February 5, 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 …
December 16, 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 …