You are browsing the archive for Callan Bentley, Author at AGU Blogosphere.
21 January 2024
Swan song
A few reflections on the AGU Blogosphere’s long, strong run, and a vision for Callan’s future online outreach.
1 January 2024
Yard list 2023
Another year has elapsed at the usual rate, and now it draws to a close. Time for me to tally up the year’s sightings. My goals for the year were to be in the Top Ten eBird users in my county, and to attempt to take a good photo of each species. I ended up at #6, and I’m happy with the photos I got (a selection of you will …
25 December 2023
The Greywacke, by Nick Davidson
Just finished a geologically focused book that the readers of this blog might be interested in. It is a history of work on delineating the early part of the Phanerozoic timescale in Wales and Scotland. The majority of the book is about Adam Sedgewick and Roderick Murchison and their close collaboration and increasing divergence and eventual total estrangement as they sought to sort out the boundaries of different periods of …
1 December 2023
Friday fold: a Massanutten cross-section from a century ago
The Friday fold digs deep into the historical archives for a near-century old illustration of the geology of the Massanutten mountain system in Virginia’s Valley & Ridge geologic province.
17 November 2023
Friday fold: Floor paver in the Atlanta airport
On my way back to Virginia from Hawaii, I had a three hour layover in the Atlanta airport. There, I spotted this charismatic stone paver on on the terminal floor. It showed folds, and so I snapped a photo, but it also shows plenty more… An annotated copy: Happy Friday, all!
24 April 2018
T. rex and the Crater of Doom, by Walter Alvarez
Walter Alvarez has a new book out, and its publication reminded me that though I read and appreciated The Mountains of St. Francis, I had never read his most famous work — the account of how he and his father and a team of other researchers zeroed in on an extraterrestrial impact explanation for the end-Cretaceous extinction. So last week I read T. rex and the Crater of Doom (1997). …
