You are browsing the archive for Friday Fold - Mountain Beltway.
17 May 2013
The broad symmetry (with smaller-scale variations) of this fold caught my eye as particularly artful when I saw it (at Howard’s recommendation) last summer in the Canadian Rockies: Kootenay National Park, British Columbia, Canada. I see a butterfly. What do you see? Happy Friday.
10 May 2013
Happy Friday! Here’s a view of the folded contact between the (older, lower) New Market Formation, and the (younger, upper) Lincolnshire Formation, as exposed in Staunton, Virginia: The contact has been folded, pretty intensely: The New Market Formation is massive, light-colored, and exhibits fenestral texture here. The Lincolnshire is darker, more thinly-bedded, and is chock full of fossil invertebrates. Explore it for yourself in this M.A.G.I.C. GigaPan: link A closer …
3 May 2013
Last weekend, after we checked Lily in for her race, I spotted some boulders near the check-in site. The next morning, once the race had started but before we could cheer her on, my field assistant and I went back to the boulders to check them out. My field assistant’s planners had forgotten to pack him a hat – so we improvised with a pair of fleece pants inverted on …
26 April 2013
The Friday fold combines a moment of insight on a field trip in the Archean Superior Province and a new paper published this month in the journal GEOLOGY.
19 April 2013
More folds from the charismatic Noonday Dolostone in Mosaic Canyon, Death Valley National Park, California: Annotated: Happy Friday!
12 April 2013
For the Friday fold today, let’s return to the warmth of Mosaic Canyon in Death Valley National Park, California: Can you see it there? Let’s zoom in on the dark area in the middle of that first photograph…. Ahh! Now that’s a fold to end the week on! Enjoy the weekend, everyone.
5 April 2013
No time for more details than that – sorry! Happy Friday and a restful weekend to all!
29 March 2013
The Friday fold photo was taken this morning on a GigaPanning expedition, and shows a small syncline within turbidite strata of the Martinsburg Formation, Page Valley, Virginia.
22 March 2013
Today, we return to my field trip from last week, for a look at an odd outcrop of the Ordovician-aged Edinburg Formation: Note the car key with green lanyard, to provide a sense of scale. It’s folded, as the yellow bedding traces show in this annotated version: But what really caught my eye about this outcrop were the odd stylolites (pressure solution “seams” with a wiggly morphology and a concentration …
15 March 2013
Yesterday, I spent a pleasant day in the field with John Singleton, the new structural geology professor at George Mason University. I was showing John a couple of sites I’ve used as field trip locations for the GMU structural geology class, and John was showing a couple of new sites to me – places he visited on last fall’s Virginia Geological Field Conference. I missed VGFC last fall, as I …