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You are browsing the archive for 2014 January.

13 January 2014

Samples from Austin: Stretched pebble conglomerate

While at the University of Texas at Austin, where the Jackson School of Geosciences was hosting the Summit on the Future of Geoscience Education this past weekend, my friend and colleague Pete Berquist snapped this image of a stretched pebble conglomerate in the structure teaching lab: Some nice examples of pressure solution evidence in there – fused pebbles; strong clasts impinging on their weaker neighbors’ boundaries… Thanks for sharing, Pete!

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10 January 2014

Friday fold: Kinked playa limestones

Another guest submission for the Friday fold. This one comes to us from Christie Rowe, and it shows a tiny kink fold in the Bitter Ridge formation (playa limestones):

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7 January 2014

Ice in the ‘hood

Some ice seen this morning, the coldest we’ve yet experienced at our home in the Fort Valley… 4° F when we got up this morning, with windchill around -15° F. Frost nucleated on a “petal” from a tulip tree (Liriodendron tulipifera): Frost on grass (note the different habit of the ice crystals here): Frost on some netting: Frost on some plant stems near a little creek on our land: Ice …

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6 January 2014

Stop conflating weather and climate

Please. Please. Please. Please stop conflating weather and climate. It is cold today, yes, and that’s a big deal. But it doesn’t influence any scientific conclusion about climate change, one way or the other. Today’s cold temperatures are a weather event. It’s distinctive, but short-lived. Climate is a long-term trend: many years of weather events. It’s not something you can point to on a single day, and say “ha!” Climate …

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3 January 2014

Friday fold: Disharmonic folding in Irish metamorphics

My former student Aaron Barth sent me a few photos of disharmonic folding in metamorphic rocks in Ireland for a guest Friday fold…. Awesome! Thanks Aaron!

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1 January 2014

2013 Yard List

Here’s our birding yard list (species seen in/from our yard) for the past year. You can compare it with 2012’s list here. Canada geese Goldfinch Tufted titmouse Dark-eyed junco Mourning dove Black-capped chickadee White-breasted nuthatch Downy woodpecker Hairy woodpecker Blue jay Brown creeper American crow Red-bellied woodpecker Pileated woodpecker Red-shouldered hawk Carolina wren Turkey vulture Eastern phoebe Turkey Purple finch Red-tailed hawk Northern flicker Barred owl American robin Eastern bluebird …

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