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24 April 2020
Friday fold: The geologic map of Pennsylvania
This is such a gorgeous map: Link 0.43 Gpx GigaPan of a geologic map by Berg, T.M., Edmunds, W.E., Geyer, A.R., Glover, A.D., Hoskins, D.M., MacLachlan, D.B., Root, S.I., Sevon, W.D., and Socolow, A.A., (1980) I’ve been organizing a bunch of geologic maps this week for my Historical Geology students, and this is one of the most beautiful. I merged the two halves of the map that were available online …
3 May 2016
Soundings, by Hali Felt
The Heezen and Tharp (1977) World Ocean Floor Panorama is an amazing map – an ideal amalgam of science and art. It is the result of a collaboration between Bruce Heezen and Marie Tharp, in conjunction with artist Heinrich Berann, made a beautiful map that brought a state-of-the-art-as-of-1978 understanding of the seafloor immediately into the minds of whoever gazed upon the map. It’s a work of art, a paragon of …
21 April 2016
Firsthand reports from Canoa, Ecuador after the quake
Callan’s mother-in-law lives in one of the most strongly-shaken regions of Ecuador. Here, she and her boyfriend recount the experience of the earthquake Saturday night and its aftermath. Includes 8 photos from the scene.
15 March 2016
Timberville
Join Callan for a virtual field trip, as he shares dozens of photos from a recent ‘field review’ of a new geological map in Virginia’s Valley & Ridge province. Highlights: graptolites, trace fossils, geopetal structures, folds and faults.
15 January 2016
Friday fold: Harpers Ferry
The geology east of Harpers Ferry, West Virginia, is cool. It’s Blue Ridge rocks, from basement to the cover sequence, tilted to the west and broken and repeated by the Short Hill Fault. Here’s a look at a detail of the Geology of the Harpers Ferry quadrangle by Southworth and Brezinski (1996). So there’s a fault! Good – but the title of this post isn’t “Friday fault” – Where’s the …
13 October 2015
Summer 2016 European GigaPan expedition: Sites wanted
Great news – I have been awarded a great professorship for the next two years. The Chancellor’s Commonwealth Professorship is a great honor and a major investment by the Virginia Community College System in me and my GigaPan project. I get course release time, a summer stipend, and reimbursable expenses of around $7500. I intend to use that money and that time to do a major GigaPan expedition in Europe …
7 January 2013
Hoerikwaggo Trail 1: the hike
Callan begins a week-long recounting of his five-day backpacking trip from the Cape of Good Hope to Cape Town, South Africa, along the Hoerikwaggo Trail. Today, we examine scenery and logistics of the trail.
4 January 2013
Friday fold: Up on Opequon Creek
I got a call last month from Rebekah Wiedower, a landowner up in Frederick & Clarke counties (her family’s property includes pieces of both), inviting me to come up and look at some anticlines and synclines that Dan Doctor (USGS) had identified on the bank of Opequon Creek. I was glad to do it, though shooting these photos meant I had to wade across the stream in my sneakers (on …
13 May 2012
Virginia’s seven Shenandoahs
The word “Shenandoah” is thought to mean “daughter of the stars,” a lovely turn of phrase even if there’s no evidence for it. The name has been applied to a variety of features in the Commonwealth of Virginia. One is the Shenandoah River, and the valley in which it flows. Here’s a look at the North Fork of the Shenandoah, northwest of Massanutten Mountain: Then there is the political entity …
16 January 2012
What I saw there
Yesterday, I showed you this picture and asked what you saw there: Today I’ll give you my impressions. This is an outcrop of sandstone of the Table Mountain Supergroup, seen on the beach in the idyllic village of Rooiels, on the eastern side of False Bay, north of Cape Hangklip, in South Africa.The field of view (scale purposely avoided) is about half a meter. Visually, it struck me as being …
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.