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19 October 2018

Friday fold: the Brooks Range, Alaska

It’s Friday, thank goodness. Today our “Friday fold” feature heads north, way north, to the Brooks Range of Alaska. There we find a trio of mountainsides exposing folds photographed in the 1990s.

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6 April 2018

Friday fold: “wrecumbent in Wrangellia”

Darrel Cowan of the University of Washington has pitched in a Friday fold. Check this lovely scene out: Darrel says this is a recumbent fold in the Upper Triassic Nizina and Chitistone limestones. I took the photo when I worked for Shell in 1973 or 1974. I’m pretty sure it is on the west wall of the canyon occupied by the Root Glacier, several kilometers NW of McCarthy, Alaska. The …

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31 December 2017

To the Bright Edge of the World, by Eowyn Ivey

My friend Betsy recommended I read this novel, and I’m glad she did. It’s of an unusual structure: a series of documents, arranged in more or less chronological order (with some variation for plot structure), written by 5 principal characters, two in particular. The two are a U.S. Army captain sent on an expedition to explore the Wolverine River Valley of Alaska, and his wife, who remains behind in Vancouver, …

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17 August 2012

Friday fold: soft sed def in Kodiak

The Friday fold is a seaside outcrop of soft sediment deformation (not post-lithification tectonic deformation) on Kodiak Island, Alaska.

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15 April 2011

Friday fold: A cold one

The Friday fold is glimpsed from Google Earth. Atop a valley glacier in south-central Alaska’s Kenai mountain range, a fold of “transverse moraine” displays parasitic folds.

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