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Gypsum
US
GS
Eur
ico
Zim
bres
FG
EL/
UE
RJ
GN
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by-nc: cobalt123
US
GS
by-nc-nd: skylarprimm
Gypsum precipitates (white) at a fumarole on the island of Vulcano in Italy.
© J
ürg
Ale
an /
Stro
mbo
li on
line
by-nc-nd: Sam
uraiCatJB
Gypsum is one of the salts left when saline
water evaporates from a lake or sea.
Gypsum in caves can form needle-like crystals that radiate from clusters on the cave floor.W
ind
Cav
e/N
PS
by-nc-nd: Sam
uraiCatJB
The mountains around White Sands National Monument contain gypsum-rich limestone, which you can see as the light-colored rock in the mountains.
NP
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onum
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Over a long period of time this has formed piles of gypsum sand, or dunes, in what we now call White Sands National Monument.
Rain dissolves the gypsum in the mountains, and the water carries it into the closed basin lake below. As the lake evaporates, gypsum crystals form and then get blown about and crushed by the wind.
by-nc: The Horror
by-n
c-nd
: Sam
urai
Cat
JB
Stele of Ushumgal, Early Dynastic I; 2900–2600 B.C.; Mesopotamia, Umma (modern Jokha) (?); Purchase, Funds from various donors, 1958 (58.29); www.metmuseum.org
Alabaster (pure gypsum)is easy to carve.
Head of a man, 3rd–4th century; Southwestern Arabia; Alabaster (gypsum); H. 9 7/16 in. (24 cm); Purchase, Mr. and Mrs. Nathaniel Spear Jr. Gift, 1982 (1982.317.1); www.metmuseum.org
Many cultures carve alabaster.
Min
istry
of C
ultu
re a
nd S
ports
of G
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by-nc-nd: mike nl
public domain
by-nc-nd: Jehsuk
Gypsum is extremely useful in
construction.
Ground gypsum and vermiculite (mica) are pressed into inch-think sheets of wallboard,also known as sheetrock or drywall.
US
GS
by-nc-nd: Stef N
oblepu
blic
dom
ain
by-nc-sa: Vincent M
a
by-nc-nd: mr.enigm
aby
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nd: G
ary
and
Kris
tieby
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lucy
louw
ho
Both wallboard and joint compound are made of gypsum. U
SG
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by-nc-sa: pwilnyc
by-nc: Quasim
ondo
GN
U
Plaster, made of gypsum, is a sculpting and a molding material.
CV
C / A
rchitect of the Capitolby
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nd:
Hay
lsto
rm's
Hea
d
Plaster casts of gypsum are often made of teeth before dental work is done.
Copper dental mold (right) and plaster cast (left).
publ
ic d
omai
nA
lcatraz Island/US
PS
/DoI
by-nc-sa: little_hedgehog
Plaster casts are made from Plaster of Paris (gypsum that has been heated).
by-n
c-nd
: kde
n604
by-nc: Harry R
ichardsby-sa: schw
a23
Gypsum can be used as a conditioner to improve soil: this farmer uses processed sheetrock scraps from building construction. O
akrid
ge N
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abor
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A TI/D
oLby: l
eigh
blac
kall
Gypsum is added to concrete as an admixture before it is poured.
by: tuppusby-nc: arim
oore
by-nc-nd: telsky
GN
U
publ
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Gypsum is a filler in paper, chalk, paint, and toothpaste.
by-nc: Leo Reynolds
by-n
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: R80
oby-nc-nd: R
yan Ozaw
aby
-nd:
Mat
t McG
ee
While searching for sulfur deposits, scientists found oil.
Natural oil and gas deposits associated with gypsum rock units can also hold large volumes of hydrogen sulfide gas. Within the past few decades, these gas deposits have replaced the mineral sulfur as our main source of the element.
by-nc-sa: vphillby
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nd: S
amur
aiC
atJB
by-nc-nd: Sam
uraiCatJB
GN
U
Gypsum
US
GS
Eur
ico
Zim
bres
FG
EL/
UE
RJ
GN
U
by-nc: cobalt123
US
GS
by-nc-nd: skylarprimm
media rights
Many of the photos in this presentation were obtained through Flickr and Wikipedia.
Funded by FIPSE and by the University of Minnesota. Compiled for Dr. Kent Kirkby, Department of Geology and Geophysics, by Kate Rosok, 2007. Each displayed image
retains its original media rights. For educational purposes only; not to be used commercially.
public domain (none)
© Copyright. All rights reserved
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by
by-nd
by-sa
by-nc-ndCre
ativ
e C
omm
ons
Lice
nses
GNU GNU Free Documentation License
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