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You are browsing the archive for 2021 June.

25 June 2021

Friday fold: The Blue Ridge Tunnel

Inside the Blue Ridge (in an 1850s-era railroad tunnel), Callan finds folds and boudinage that formed during Appalachian mountain-building.

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16 June 2021

Book report

A few more books I’ve read recently…. Why Fish Don’t Exist, by Lulu Miller An interesting volume by NPR’s Lulu Miller – a philosophical biography of the first president of Stanford University, the fish biologist David Starr Jordan, mainly, but also an autobiography of key moments in Miller’s own life. At first, she looks to Jordan for inspiration – how does this man keep going after a series of awful …

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14 June 2021

What the Eyes Don’t See, by Mona Hanna-Attisha

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 …

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11 June 2021

Friday fold: inadvertent kink fold analogue model

It’s Friday! Adam Forte, a geology professor at LSU, posted this image yesterday on Twitter: It’s a box of sheets of newsprint, stored vertically and ignored for a while, now rotated 90° so we’re looking at a cross-sectional view. To me, this is an excellent example of a physical analogue modelling experiment (albeit inadvertent) that demonstrates the process by which kink folds form. The key parameters to get this distinctive …

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