Era-human.png
Halopedia Era UNSC.png
HaloArray.png
Era-rw.png

Granite: Difference between revisions

From Halopedia, the Halo wiki

(lol this page)
(Good to know.)
Line 1: Line 1:
{{Era|Human|UNSC|HCW|RW}}
{{Era|Human|UNSC|HCW|RW}}
[[Image:Granite.jpg|thumb|right|250px|Slab of Granite]]
{{Wikipedia}}
'''Granite''' (from Latin ''granum'', meaning "grain") is a common and widely occurring type of intrusive, felsic, igneous rock. It has a medium to coarse texture, occasionally with some individual crystals larger than the ground mass forming a rock known as porphyry. Granites can be pink to dark gray or even black, depending on their chemistry and mineralogy. Outcrops of granite tend to form tors, and rounded massifs. Granites sometimes occur in circular depressions surrounded by a range of hills, formed by the metamorphic aureole or hornfels.
[[File:Granite.jpg|thumb|right|250px|Slab of granite]]
'''Granite''' (from Latin ''granum'', meaning "grain") is a common and widely occurring type of intrusive, felsic, igneous rock. It has a medium to coarse texture, occasionally with some individual crystals larger than the ground mass forming a rock known as porphyry. Granites can be pink to dark gray or even black, depending on their chemistry and mineralogy. Outcrops of granite tend to form tors, and rounded massifs. Granites sometimes occur in circular depressions surrounded by a range of hills, formed by the metamorphic aureole or hornfels. Granite is nearly always massive (lacking internal structures), hard and tough, and therefore it has gained widespread use as a construction stone.


Granite is nearly always massive (lacking internal structures), hard and tough, and therefore it has gained widespread use as a construction stone.
The [[Highland Mountains]] on [[Reach]] were mountains of granite,<ref>'''Halo: The Fall of Reach''', ''page 229''</ref> and the planet [[Onyx]] also had numerous deposits of granite forming hills and mesas.<ref>'''Halo: Ghosts of Onyx''', ''page 124''</ref> [[Harvest]]'s [[Harvest Parliament Building|parliament building]] was constructed of granite.<ref>'''Halo: Contact Harvest''', ''page 79''</ref> Certain [[Forerunner]] structures on [[Installation 04|Alpha Halo]] were also made using granite, with an intricate level of [[Forerunner symbols|symbols]] embedded in their surfaces.<ref>'''Halo: The Flood''', ''page ??''</ref>
 
==Radiation==
Granite is a normal, geological, source of radiation in the natural environment. Granite contains around 10 to 20 parts per million of uranium. By contrast, more mafic rocks such as tonalite, gabbro or diorite have 1 to 5 ppm uranium, and limestones and sedimentary rocks usually have equally low amounts.
 
Many large granite plutons are the sources for palaeochannel-hosted or roll front uranium ore deposits, where the uranium washes into the sediments from the granite uplands and associated, often highly radioactive, pegmatites.
 
In buildings constructed primarily from natural granite, it is possible to be exposed to approximately 200 mrems per year.[5]
 
Granite could be considered a potential natural radiological hazard as, for instance, villages located over granite may be susceptible to higher doses of radiation than other communities.[6] Cellars and basements sunk into soils formed over or from particularly uraniferous granites can become a trap for radon gas, which is heavier than air.
 
However, in the majority of cases, although granite is a significant source of natural radiation as compared to other rocks it is not often an acute health threat or significant risk factor. Various resources from national geological survey organizations are accessible online to assist in assessing the risk factors in granite country and design rules relating, in particular, to preventing accumulation of radon gas in enclosed basements and dwellings.
 
==Uses==
The [[Highland Mountains]] on [[Reach]] were mountains of granite<ref>'''[[Halo: The Fall of Reach]]''', ''page 229''</ref>, and the planet [[Onyx]] also had numerous deposits of granite forming hills and mesas.<ref>'''[[Halo: Ghosts of Onyx]]''', ''page 124''</ref> [[Harvest]]'s parliament building was constructed of granite.<ref>'''[[Halo: Contact Harvest]]''', ''page 79''</ref> Forerunner structures on [[Installation 04|Alpha Halo]] were also made using granite, with an intricate level of symbols embedded in their surfaces<ref>'''[[Halo: The Flood]]'''</ref>.


==List of appearances==
==List of appearances==

Revision as of 22:56, September 19, 2013

Wikipedia.png
 There is more information available on this subject at Granite on the English Wikipedia.
File:Granite.jpg
Slab of granite

Granite (from Latin granum, meaning "grain") is a common and widely occurring type of intrusive, felsic, igneous rock. It has a medium to coarse texture, occasionally with some individual crystals larger than the ground mass forming a rock known as porphyry. Granites can be pink to dark gray or even black, depending on their chemistry and mineralogy. Outcrops of granite tend to form tors, and rounded massifs. Granites sometimes occur in circular depressions surrounded by a range of hills, formed by the metamorphic aureole or hornfels. Granite is nearly always massive (lacking internal structures), hard and tough, and therefore it has gained widespread use as a construction stone.

The Highland Mountains on Reach were mountains of granite,[1] and the planet Onyx also had numerous deposits of granite forming hills and mesas.[2] Harvest's parliament building was constructed of granite.[3] Certain Forerunner structures on Alpha Halo were also made using granite, with an intricate level of symbols embedded in their surfaces.[4]

List of appearances

Sources

  1. ^ Halo: The Fall of Reach, page 229
  2. ^ Halo: Ghosts of Onyx, page 124
  3. ^ Halo: Contact Harvest, page 79
  4. ^ Halo: The Flood, page ??
Retrieved from "https://www.halopedia.org/index.php?title=Granite&oldid=1053815"