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siliceous's Usage Examples:

Gritstone or grit is a hard, coarse-grained, siliceous sandstone.

It occurs in hornfels and siliceous marble xenoliths within and adjacent to a nepheline syenite.

foraminifera, (b) phosphatic, as in the study of some vertebrates, (c) siliceous, as in diatoms and radiolaria, or (d) organic, as in the pollen and spores.

The redeposited cementing material is most commonly calcareous or siliceous.

Carboniferous Limestone overlain by Triassic Mercia Mudstones and Sandstones with geodes, which were formed by siliceous mineral replacement.

They form from the redeposition of amorphous silica arising from the dissolution of siliceous spicules.

lichens in the Megasporaceae family with foliose thalli that become crustose areolate in the center with age, and grow on calcareous to siliceous rocks.

Based upon the composition of the ooze, there are three main types of pelagic sediments: siliceous oozes, calcareous oozes, and red clays.

siliceous and thought them to be desmids (freshwater conjugating algae), placing them within his own Recent desmid genus Xanthidium.

a prominent group of filose amoebae that produce shells or tests from siliceous scales, plates, and sometimes spines.

both siliceous and calcareous biogenic particles as they settle to the ocean bottom.

chalcedonic) sedimentary rock, which results from the weathering (decalcification) of chert or siliceous limestone.

Beads tend to be carefully made out of hard siliceous rock such as quartz, chalcedony, jasper, or carnelian.