Talk:Scoria

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INTRUSIVE OR EXTRUSIVE?

The title says my question: is it intrusive or extrusive? (I'm not completely sure by the article because I can't understand the super-scientific stuff. It should be put on more clearly.

^{Fear The Hams.}-- 23:17, 16 April 2007 (UTC)[reply]

Extrusive. It is erupted out of volcanoes. Guanlong wucaii 06:26, 10 June 2009 (UTC)Guanlongwucaii[reply]

Yes it is extrusive, but actually represents splatter. If it is hot enough it will weld together, it can form loose slopses and sometimes if the wind is strong enough it can be blown downwind, giving scoria cones an elevated summit downwind of the vent.The Geologist (talk) 16:45, 20 January 2013 (UTC)[reply]

MOH'S HARDNESS SCALE

Also, what is it on the Moh's Scale?

^{Fear The Hams.}-- 23:19, 16 April 2007 (UTC)[reply]

talc is one, diamond is ten. if you can scratch it with a fingernail it is about three, scratches a copper coin 5, scrtatches steel knife 7 (quartz) Russjass (talk) 17:31, 14 May 2008 (UTC)[reply]

All the scoria I have tested has scratched my knife. Thereby proving what RussJass has stated.The Geologist (talk) 16:42, 20 January 2013 (UTC)[reply]

Gas grills

I believe this is the type of rock that is used in gas grills. Shouldn't this be mentioned in the article? ANDROS¹³³⁷ 21:11, 26 September 2010 (UTC)[reply]

Gas grill use many different types of rock. Often what the manufacturer or supplier call "rock" is anything but. For example many kitchen tops are sold as "granite" but are more often "Gneiss, Migmatites, Basalts," but try and get the supplier to call it by its correct name is impossible. Also I believe that some wall cavity insulation is call rock wool!The Geologist (talk) 16:41, 20 January 2013 (UTC)[reply]

Name

The term "Scoria" is ancient Greek in origin and actually means "DUNG" as in dung-heaps. It was so named because it resembles dung heaps. Whilst many scoria cones are red this is by no means unique to them, more typically many scoria cones are black. The reason is chemical the red cones are composed of oxidised iron - FE₂O₃, whereas the black cones are reduced iron - FeO. Some scoria cones also exhibit a section of oxidised and reduced iron and are often interpreted as having been erupted through water.The Geologist (talk) 16:37, 20 January 2013 (UTC)[reply]

There is no Information about Reticulite

Reticulite redirects to Scoria, but Scoria no longer describes reticulite. From 11:37, 17 May 2006 to 14:44, 27 October 2010 Scoria did have an unsourced paragraph about it, but it was deleted without comment on 18:27, 7 November 2010‎ by 173.81.97.71.

Current research describes Reticulite as a type of pumice or tephra derived from magma, not from scoria. Perhaps a Reticulite article should be created with just a reference to it from Scoria. The Pyroclastic Rock article should probably also have a link to Reticulite.

Some current references for reticulite are:

James Van Gundy. Earth Science Picture of the Day: June 01, 2010 Reticulite. http://epod.usra.edu/blog/2010/06/reticulite.html

James St. John. Reticulite (thread-lace scoria) (unrecorded high-fountain eruption of Kilauea Volcano's East Rift Zone, Hawaii) https://www.flickr.com/photos/jsjgeology/14838947530 The photo is available in https://commons.wikimedia.org/wiki/File:Reticulite_from_Kilauea_volcano_in_Hawaii.jpg

Richard Harwood. EARTH SCIENCE LAB: Volcanic Materials Identification, 2011. http://facweb.bhc.edu/academics/science/harwoodr/GEOL101/Labs/VolcanicMaterials/

Rust, A. C.; Cashman, K. V. Reticulite, Scoria and Lava: Foam Formation in Hawaiian Fire Fountain Eruptions. American Geophysical Union, Fall Meeting 2006, abstract #V43A-1778. http://adsabs.harvard.edu/abs/2006AGUFM.V43A1778R

Margaret T. Mangan, Katharine V. Cashman. The structure of basaltic scoria and reticulite and inferences for vesiculation, foam formation, and fragmentation in lava fountains. Journal of Volcanology and Geothermal Research Volume 73, Issues 1–2, September 1996, Pages 1-18. http://www.sciencedirect.com/science/article/pii/0377027396000182

K.V. Cashman, A.C. Rust, H.M. Wright. Pattern and structure of basaltic reticulite: foam formation in lava fountains. Geophysical Research Abstracts, Vol. 8, 05398, 2006 SRef-ID: 1607-7962/gra/EGU06-A-05398

David Darling. Reticulate. The World of Science. http://www.daviddarling.info/encyclopedia/R/reticulite.html

Alison Rust, Katharine V. Cashman. Reticulite, Scoria and Lava: Foam Formation in Hawaiian Fire Fountain Eruptions. https://www.researchgate.net/publication/253423480_Reticulite_Scoria_and_Lava_Foam_Formation_in_Hawaiian_Fire_Fountain_Eruptions

Reticulite. http://www.geology.sdsu.edu/how_volcanoes_work/Thumblinks/Reticulite_page.html

Hawaian Volcano Observatory. Almost nothing is enough: reticulite helps measure depth of Kilauea's caldera 500 years ago. Volcano News: September 6, 2007. http://hvo.wr.usgs.gov/volcanowatch/archive/2007/07_09_06.htmlhttp://hvo.wr.usgs.gov/volcanowatch/archive/2007/07_09_06.htmlhttp://hvo.wr.usgs.gov/volcanowatch/archive/2007/07_09_06.html

-- Allan Moluf