GLG310 Structural Geology

Physical character of faults

April 22, 2023 GLG310 Structural Geology http://geolmag.geoscienceworld.org/content/145/3/435/F3.expansion

http://www.photoree.com/photos/permalink/891384-19756080@N00

http://www.gm.univ-montp2.fr/spip/spip.php?article761

Fault surfaces

April 22, 2023 GLG310 Structural Geology

http://homepage.usask.ca/~mjr347/prog/geoe118/geoe118.052.html

Physical character of faults

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http://homepage.usask.ca/~mjr347/prog/geoe118/geoe118.052.html

Breccia

Photomicrograph of fault breccia in the Antietam Formation, Blue Ridge province. Breccias form when rocks are extensively fractured in fault zones and are cemented together when minerals precipitate in the cracks and fractures. Note the angular fragments (fr) of quartz sandstone in a matrix of fine-grained iron oxide cement (ic). Field of View 4 x 2.7 mm, Cross Polarized Light.

http://web.wm.edu/geology/virginia/provinces/Blueridge/fault_zone_lithology.html

Woodcock and Mort, 2008

April 22, 2023http://www.webpages.uidaho.edu/~simkat/geol345_files/2012lecture9.html

April 22, 2023 GLG310 Structural Geologyhttp://www.carmeliet.arch.ethz.ch/People/Ferdowsi

Gouge along fault zone is more easily eroded

April 22, 2023 GLG310 Structural Geology

SAFOD: hole and core

April 22, 2023 GLG310 Structural Geology

http://www.gm.univ-montp2.fr/spip/spip.php?article761

The word "pseudotachylite" was coined early in the 1900s to name a peculiar glassy rock that looks sort of like tachylite but isn't. Tachylite ("TAK-a-lite") is a basaltic glass

A psuedotachylite is a frictionally generated melt rock

April 22, 2023 GLG310 Structural Geology

http://www4.nau.edu/meteorite/meteorite/book-glossaryp.html

A psuedotachylite is a frictionally generated melt rock--formed by fault slip, but also impacts

April 22, 2023 GLG310 Structural Geologyhttp://maps.unomaha.edu/maher/GEOL3300/week10/dsz.html

Mylonite is a rock formed during shear with ductile mineral behavior (quartz), grainsize reduction (feldspar), and some grain growth

April 22, 2023 GLG310 Structural Geology

http://en.wikipedia.org/wiki/Mylonite http://upload.wikimedia.org/wikipedia/commons/1/1e/Mylonite_Strona.jpg

http://upload.wikimedia.org/wikipedia/commons/c/cd/Ska%C5%82a_zmyllonityzowana.jpg