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13 September 2019
Friday fold: crinkled schist from Italy
AGU’s Chief Digital Officer Jay Brodsky offers up a fresh European fold for you today — and this one is on rather a smaller scale than Jay’s last Friday fold contribution… Click through for a bigger version. These are lovely crinkly folds in highly foliated rocks. I love boxy little crenulations like these. Jay tells me that this is from Graines, Italy, in one of the valleys of the Val …
27 August 2018
Beautiful Swimmers, by William Warner
The subtitle of this wonderful book is “Watermen, Crabs, and the Chesapeake Bay.” It’s an excellent account of crab ecology in the Chesapeake Bay as it stood in the mid-1970s, and simultaneously a sympathetic portrait of the lives of the locals who capture those crabs for sale to the seafood market. The writing is thoughtful and calm, paced very similarly to John McPhee’s writing, rich in quotes from the watermen …
7 July 2017
Friday fold: marble in a thermopolium at Herculaneum
It’s Friday. Let’s find a historic sort of Friday fold in the ruins of Herculaneum, Naples, Italy.
23 June 2016
Mega-trace fossils in the floor of the Old Bushmills Distillery, Northern Ireland
We arrived at Old Bushmills at 4:06pm, and the last tour of the distillery for the day had left at 4:00. But all was not lost – We were delighted to see that the visitor center area was paved in slabs of shale with tremendously large, well-preserved trace fossils – sinuous burrows parallel to the bedding plane, in some cases cross-cutting or looping back over themselves! Great stuff – balm …
8 April 2016
The Hidden Half of Nature, by David R. Montgomery and Anne Biklé
David Montgomery is a professor of geomorphology at the University of Washington, in Seattle. I’m a fan of his work in soil conservation and countering creationism, so I was very pleased to find myself sharing the “honoree” table with him in Vancouver the year before last, at the annual awards luncheon for the National Association of Geoscience Teachers and the Geological Society of America’s Geoscience Education Division. I was there …
21 March 2016
Animal, Vegetable, Miracle, by Barbara Kingsolver
Here’s a great book about one family’s efforts to eat as locally as possible for a year, sort of. Whether or not they’re evangelical enough in their southwest Virginia locavory (I would have made the same call with regard to olive oil and coffee!), Barbara Kingsolver and her family definitely are certainly inspiring. Their efforts to produce their own food or buy it from their farming neighbors are simultaneously enlightening, …
1 January 2016
Friday fold: Folded Mountains Ale
My friend Eric Pyle drew my attention to this ale earlier in the week – I reckon that will do for this week’s Friday fold. Cheers! And Happy New Year!
26 September 2015
A History of the World in Six Glasses, by Tom Standage
This week’s book was a survey of human history, from the dawn of civilization to the Cold War, of the various ways that societal, health, political, technological, and economic factors drove the adoption of various beverages, and how the presence of those beverages in human society generated ripples of cause and effect, propelling advances and turns of history that led us to the world we live in. It’s a prime …
8 May 2014
Honey crystallization as an analogue for magma segregation and cumulate textures
Check this out: Maybe I’ve got low blood sugar, but I think I see a magma chamber in that jar of honey. There is clearly some crystal settling going on there, and it appears that the more crystals there are, the easier it is to trap bubbles. When the clots of crystals get too dense, they peel off (stope) and drop down to the floor of the jar. Similar sorting …
Callan Bentley is Associate Professor of Geology at Piedmont Virginia Community College in Charlottesville, Virginia. He is a Fellow of the Geological Society of America. For his work on this blog, the National Association of Geoscience Teachers recognized him with the James Shea Award. He has also won the Outstanding Faculty Award from the State Council on Higher Education in Virginia, and the Biggs Award for Excellence in Geoscience Teaching from the Geoscience Education Division of the Geological Society of America. In previous years, Callan served as a contributing editor at EARTH magazine, President of the Geological Society of Washington and President the Geo2YC division of NAGT.