Andesite by https://padlet.com/joanna_hodge/25joizgx89ykrwjo GEOL 83 Rock and Mineral Lab Exemplar en-us 2020-07-27 13:54:08 UTC 2023-02-28 20:19:20 UTC hello@padlet.com Rock Type joanna_hodge https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663307568 Andesite is an igneous extrusive (volcanic) rock named for the Andes Mountains in South America]]> 2020-07-27 13:57:00 UTC https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663307568 Texture and Composition joanna_hodge https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663310623 Andesite is fine-grained to porphyritic and is primarily composed of plagioclase, amphibole, pyroxene and biotite. ]]> 2020-07-27 14:01:13 UTC https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663310623 Formation Processes and Environment joanna_hodge https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663312127 Andesite forms stratovolcanoes at convergent plate boundaries. Mt Taranaki (background image) in New Zealand is an example. ]]> 2020-07-27 14:03:19 UTC https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663312127 Usage and End Products joanna_hodge https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663316194 Andesite is commonly used for construction aggregate and in road building. ]]> 2020-07-27 14:08:34 UTC https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663316194 References joanna_hodge https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663321522 "Mt Taranaki from Lake Mangamahoe" by Hodge, 2007.

"A condor flying in front of the igneous rocks of the Andes" by Hodge, 2012

"Hornblende andesite (western base of Mount Shasta, California, USA)" flickr photo by James St. John https://flickr.com/photos/jsjgeology/39675099870 shared under a Creative Commons (BY) license

“Oceanic-continental destructive” by domdomegg - Own work, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=45732560

“10 mm aggregate” Original uploaded by Billbeee (Transfered by Josve05a) / CC BY (https://creativecommons.org/licenses/by/2.5)]]> 2020-07-27 14:14:43 UTC https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/663321522 abbigalegibson https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/1206577502 2021-02-16 11:49:53 UTC https://padlet.com/joanna_hodge/25joizgx89ykrwjo/wish/1206577502