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17 January 2018

Winter ichnology puzzle

Here’s a puzzler to warm up your chilly brain this Wednesday morning: Click to enlarge Figure out the story told by this set of imprints in the snow. The branch of science called ichnology studies the traces organisms leave behind. There’s a neat little story here. If you’ve got a guess, then you can check your answer by watching the video that this screenshot came from. It was posted on …

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24 October 2016

GIGAmacro views of komatiite

Erik Klemetti posted today at Eruptions about komatiite, which is apropos, considering I just finished imaging some samples of that ultramafic volcanic rock. Have a look at three samples from Barberton Greenstone Belt here, each from the 3.27 Ga Weltevreden Formation: [gigapan id=”192621″] Link GigaPan by Callan Bentley [gigapan id=”192599″] Link GigaPan by Callan Bentley [gigapan id=”192337″] Link GigaPan by Callan Bentley And, while we’re at it, here’s one from …

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2 May 2016

3D models to spin and twist

More 3D models: digital facsimiles of real rock samples. Check them out and explore! Clinker from the Powder River Basin, Wyoming: [sketchfab id=”afb351be49f04c8eab1acc29a8a2bcfb” start=”0″ spin=”” controls=”0″] Ripple marks from the Rose Hill Formation, West Virginia: [sketchfab id=”6b56924ee2f84dd2821c4cb30e4869f9″ start=”0″ spin=”” controls=”0″] Meta-komatiite from the Red Lake Greenstone Belt, northern Ontario, Canada: [sketchfab id=”53dc4d161c974d7b86f70639062551e0″ start=”0″ spin=”” controls=”0″]

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29 March 2011

Tillite in outwash

Hoo boy. This one made me yelp… While on the glacial geology of western Pennsylvania trip last Saturday, we visited a gravel quarrying operation. The operators were extracting gravel from a glacial lake delta deposit, and it was full of glacial outwash — sediments washed out from the melting front of the Erie lobe of the Laurentide ice sheet. We were there to look at the Pleistocene features, but several …

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