-
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...
-
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...
-
classification is done by
composition as high calcium,
argillaceous (clayey),
silicious, conglomerate, magnesian, dolomite, and
other limestones.
Uncommon sources...
- mantle. The
skeleton of
sponges consists of
microscopic calcareous or
silicious ****ules. The
demosponges include 90% of all
species of sponges. Their...
-
Henri Fleisch.
Worked tools were
found made from
abundant nodules of
silicious, grey-yellow limestone. The
material suggested to be
Heavy Neolithic consisted...
-
culture found at
Mtaileb I -
Thick and
heavy biface,
retouched all over with
jagged and
irregular edges.
Light grey and
streaky silicious limestone....
- Gironès
Catalonia Parent range Catalan Coastal Range Geology Mountain type
Silicious Climbing First ascent Unknown Easiest route From La
Bisbal d'Empordà ...
- cross-bedded and
probably wind-deposited,
lying in the canyon.
Miocene silicious clay
covering a very
limited area.
Eocene limestone covering most of the...
- 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...