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14 June 2021
I just finished an excellent insider account of the Flint water crisis, written by the pediatrician who brought it to the attention of the wider world. Mona Hanna-Attisha practices medicine in Flint, has a background in environmental activism, and happened to be good friends with a specialist in the management of municipal water systems. An evening’s conversation between Dr. Mona (her preferred name) and her friend ends up launching her …
10 April 2020
Folded Eocene turbidites exposed on the face of a spectacular waterfall in the Spanish Pyrenees. It’s Friday; enjoy this fold!
3 February 2014
This past week, there’s been a beautiful sight along the stretch of the Fort Valley Road that goes past the Blue Hole section of Passage Creek. Click to enlarge Ice has been forming beautiful forms as groundwater seeps out along bedding planes in the Massanutten Sandstone (a Silurian-aged quartz arenite, folded during late Paleozoic Alleghanian deformation). At this site, the bedding dips moderately to the south. This is close to …
10 December 2013
Today, I’d like to share some images with you from Waterton Lakes National Park in Alberta, Canada. This is the Crypt Lake hike, a popular (but grueling) hike in the park. It starts at the Waterton Marina, across Emerald Bay from the Prince of Wales Hotel. Mount Crandell and the Bear’s Hump are visible in the distance. This image can be made much bigger if you click on it. Click …
9 November 2012
The Friday fold is seen at one of the stops on Callan’s pre-GSA-Charlotte field trip: a small waterfall in North Carolina’s Inner Piedmont.
23 May 2012
A few shots from Fossil Falls, in the southern Owens Valley, California… This is the now-dry river bed of the Owens River. There’s abundant evidence of water-induced erosion (potholes, polishing, etc.), but nary a drop of water to be seen – Though this particular portion of the Owens River drainage dried up in the Pleistocene, it parallels the more recent history of the valley’s water resources, which are now being …
4 March 2012
Yesterday I flew from DC to Reno, Nevada in the company of 11 students, and then we rented vehicles and drove south on Route 395, one of the greatest roads in America, to Bishop, California, where we area based for the next 3 days. We’re doing a regional field geology course examining the extraordinary rocks, structure, geomorphology, and water resource issues of the Owens Valley and Death Valley. Just before …
25 January 2012
Here’s where to find it, if you want to. Can’t say I recommend it – just an overlook, with no opportunities to hike or swim or explore in any more detail than just passively observing gravity exert its pull on water unencumbered by underlying rock.
28 January 2011
The Friday fold is a series of strata underwater near California’s famed “Mavericks” surf break.
27 February 2010
This site, from the USGS, shows depth to the water table for a well in Virginia: You’ll notice the tidal influence on the water table (broad sine-curve-like up and down crests and troughs at ~12 hour intervals), and then a sudden perturbation which caused some wiggles almost two and a half feet of magnitude! This, presumably, is the seismic waves from the Chilean earthquake arriving — surface waves, I would …