Swan song
A few reflections on the AGU Blogosphere’s long, strong run, and a vision for Callan’s future online outreach.
A few reflections on the AGU Blogosphere’s long, strong run, and a vision for Callan’s future online outreach.
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 … Read more
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 … Read more
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.
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!
A field trip to examine the glacial geology of Discovery Park in Seattle, Washington, leads Callan to contemplate the nature of expertise — and especially his steep learning curve on an oceanographic cruise.
Callan is currently at sea aboard the research vessel Thomas G. Thompson, crossing the North Pacific Ocean from Seattle to Honolulu. In this post, he explores a fascinating aspect of life on the high seas: there is shockingly little life! Explore the scant copepods and albatrosses and reflect on life in the oligotrophic open ocean.
The Friday fold returns!
Today we join the Virginia Geological Field Conference to look at primary volcanic flow banding in a Neoproterozoic rhyolite, and consider what it might have to tell us about the ancient Snowball Earth glaciations.
Hi all! I’ve been putting my energy into video production more than blogging lately, but let me share some of that work with you:
On a birding hike yesterday morning, I found this: This is a little slab of kinked phyllite of the Candler Formation. This metamorphic rock started as mud (and ash) deposited atop the Catoctin Formation, and it was later squeezed and heated during Appalachian mountain-building, encouraging the growth of micas at the expense of clay. A … Read more