-
Silicon dioxide, also
known as silica, is an
oxide of
silicon with the
chemical formula SiO2,
commonly found in
nature as quartz. In many
parts of the...
- ****ules are
structural elements found in most sponges. The
meshing of many ****ules
serves as the sponge's
skeleton and thus it
provides structural support...
-
classification is done by
composition as high calcium,
argillaceous (clayey),
silicious, conglomerate, magnesian, dolomite, and
other limestones.
Uncommon sources...
-
source of
dissolved silica in the
porous media could be the ****ules of
silicious sponges (demosponges).
Certain types of flint, such as that from the south...
-
culture found at
Mtaileb I -
Thick and
heavy biface,
retouched all over with
jagged and
irregular edges.
Light grey and
streaky silicious limestone....
- of the mountain. It is soft yet brackish, and
there is no
deposit of
silicious or
cretaceous matter, but it has a
strong smell of sulphur." He further...
- cross-bedded and
probably wind-deposited,
lying in the canyon.
Miocene silicious clay
covering a very
limited area.
Eocene limestone covering most of the...
-
mineral was
described in the
patent application as
pulverised gl****,
silicious stones, or asbestos, in
powdered form. Much
development ensued by the...
-
shale again.
Above the
formation is the
Piyuancun formation consisting of
silicious rock. The
Lantian formation overlies diamictite from the Cryogenian. The...
- animals. They
belong to the
phylum Porifera in the
classification system.
Silicious sponges are
commonly found with
silicified sedimentary layers, for example...
