Advertisement

You are browsing the archive for structure Archives - Mountain Beltway.

15 July 2018

Chickie’s Rock, Pennsylvania

A virtual field trip to the deformed quartzites and metaconglomerates of Chickie’s Rock and Sam Lewis State Park in Lancaster County, Pennsylvania.

Read More >>

No Comments/Trackbacks >>


23 June 2018

Deformed conglomerate of Frog Lakes, California

Fifteen years after mapping deformed rocks of the Sierra Crest shear zone system in the high Sierra, a family vacation brings Callan back to the pre-batholith metasedimentary rocks which show a pronounced strain.

Read More >>

1 Comment/Trackback >>


1 June 2018

Friday fold: a quartet from Marli Miller’s website

Marli Miller is a senior instructor at the University of Oregon. She is the author of Roadside Geology of Oregon and (with Darrel Cowan) Roadside Geology of Washington. She’s also a very talented geological photographer. She launched a website recently to showcase her work and make it available for instructors: Geology Pics. After chatting with Marli a bit in Flagstaff at the Rocky Mountain / Cordilleran section meetings of GSA …

Read More >>

4 Comments/Trackbacks >>


26 March 2018

Raider of the Lost Anticlines

A solo hike in search of anticlines yields new outcrops and good views!

Read More >>

1 Comment/Trackback >>


1 March 2018

A GIGAmacro view of a cool outcrop in Scotland

As noted previously, the old way of viewing gigapixel imagery is no more. But there is a new, better way. The GIGAmacro company has a better viewing platform that can be used either with images uploaded to their server or  with pre-existing images that currently “live” at GigaPan.com. Here’s an example: a roadcut of limestone of the Grudaidh Formation (Durness Group) in the Northwest Highlands of Scotland, near Ardvreck Castle, …

Read More >>

2 Comments/Trackbacks >>


16 February 2018

Friday fold: Zerrissene turbidite system, Namibia

The University of Maryland’s Jay Kaufman makes our Friday fold happen by sharing some images of folds from the Zerrissene turbidite system of northwestern Namibia.

Read More >>

3 Comments/Trackbacks >>


13 February 2018

S-C fabric in limestone, Camerino, Italy

Some scaly Italian limestone shows off two foliations (S and C) which reveal the kinematic motions that built the Apennines.

Read More >>

No Comments/Trackbacks >>


2 February 2018

Friday fold: 3D model from the Portsoy Shear Zone

The Friday fold is a really cool 3D model of differentially-weathered calc-silicate rocks in Scotland that were folded during the Caledonian Orogeny.

Read More >>

No Comments/Trackbacks >>


26 January 2018

Friday fold: eastern Andes

This image graces the cover of the new report, Challenges and opportunities for research in tectonics: Understanding deformation and the processes that link Earth systems, from geologic time to human time. A community vision document submitted to the U.S. National Science Foundation: Make it bigger by clicking it The photo is of a landscape in the Eastern Cordillera of the Andes, southern Peru, showing folded Permian carbonates cut by a …

Read More >>

No Comments/Trackbacks >>


23 January 2018

A kid and his slicks

On a family hike, Callan’s son finds some interesting smooth lines on a rock. What are they? What do they tell us? Tune in for a brief history of Appalachian geology.

Read More >>

5 Comments/Trackbacks >>