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16 November 2016
Cobble diversity of Fetlar’s beaches
Now that we’ve examined the geology of the outcrops at Funzie Bay on the island of Fetlar in northeast Shetland, let’s stroll along two beaches. Here we have cobbles from Funzie Beach and a small beach eroded from serpentenite and metaharzburgite of the island’s ophiolite complex. Compare. Contrast. Rejoice. Link GigaPan by Callan Bentley Link GigaPan by Callan Bentley Both of these were handheld panoramas of ~60 photos apiece. It’s …
15 November 2016
Hate trumps love; Ideology trumps science
It’s been a week since Donald Trump defeated Hillary Clinton in the race for the President of the United States. I’ve been processing the news, and I’m not happy about it. I’ve been on “radio silence” for a week, mourning, ruminating, fretting. From my perspective, this is one of the most disturbing developments in the history of my country since the Civil War, since the McCarthy hearings, and since the …
8 November 2016
Funzie
Funzie Bay in eastern Fetlar, Shetland, is the place with a stretched-pebble metaconglomerate that triggered the development of the Flinn Diagram. Join Callan on a pilgrimage of structural geology to this special place.
7 November 2016
Coastal colluvium + coal contest in context
Here’s the answer to the contest: This is an outcrop on the beach at Funzie Bay, Fetlar, Shetland, U.K. The modern beach sediment is the lightest-colored, rounded cobbles at both the top and bottom of the photo. Poking out in between is a layer of light-gray colluvium (angular fragments) overlain by dark peat, now perhaps approaching lignite. Because peat in Shetland cloaks the hillsides but is unlikely to grow a …
6 November 2016
Contest: interpret this outcrop
Lens cap for scale. Correctly tell me what’s going on here, and you get A Big Prize!
5 November 2016
Travels in Siberia, by Ian Frazier
I’ve let my subscription to the New Yorker lapse, but before I did, I was pleased to read each week its diverse suite of authors on a diverse suite of topics. This has been a source of surprising delight on several occasions, and has allowed me to discover not only topics I never thought to be interested in, but also authorial voices I never would have otherwise read. I’m reminded …
4 November 2016
Friday fold: orogeny in a cobble
Happy Friday. Thank goodness it’s the last one before this horrible election season finally concludes. Let’s celebrate with two cobbles from the beach at Papil Water, Fetlar, Shetland. They show small-scale folds in metasedimentary and metavolcanic rocks of Ordovician or Silurian age, part of the ophiolite complex that makes up most of Fetlar. Each is a nice little sliver of mountain-building, small enough to hold in a hand. “Time in …
3 November 2016
A “triple tombolo” in northern Shetland
We’ve taken a look already at an exemplary tombolo from Shetland. Today, I’m dialing up the tombolosity of the blog with a Triple Feature: Click to make much larger (8000 pixels wide) If you look closely here, you’ll see that only the rightmost bar fully connects the two islands. It’s the only true tombolo, sensu stricto, at this site. The other two perhaps deserve another name, though I’m not sure …
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.