-
Geyserite, or
siliceous sinter, is a form of
opaline silica that is
often found as
crusts or
layers around hot
springs and geysers.
Botryoidal geyserite...
- Ménilmontant (Paris), France,
where it
occurs as
concretions within bituminous Early Oligocene Menilite Shales.
Geyserite Hyalite Menilite on Mindat.org v t e...
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amorphous opal.
Gradually the opal
anneals into quartz,
forming geyserite.
Geyserite often covers the
microbial mats that grow in geysers. As the mats...
- m****es.
Named after Santa Fiora, Italy,
fiorite is used as a gemstone.
Geyserite Manutchehr-Danai,
Mohsen (2000).
Dictionary of Gems and Gemology. Springer-Verlag...
-
aqueous solution Flint –
Cryptocrystalline form of the
mineral quartz Geyserite – Form of
opaline silica often found around hot
springs and
geysers Greywacke –...
- cooling, the
silica is
deposited as
geyserite, a form of opal (opal-A: SiO2·nH2O). This
process is slow
enough that
geyserite is not all
deposited immediately...
-
earliest known life on land may have been
found in 3.48-billion-year-old
geyserite and
other related mineral deposits (often
found around hot
springs and...
- hyalite, a
colorless gl****-clear opal
sometimes called Muller's gl****;
geyserite, also
called siliceous sinter,
deposited around hot
springs or geysers;...
- caldera. Many of the
thermal features in
Yellowstone build up sinter,
geyserite, or
travertine deposits around and
within them. The
various geyser basins...
- of
Yellowstone National Park. It is
noted for the
particularly large geyserite sinter deposits,
which form its cone.
These deposits have been likened...
