Siliceous sediment | Article about siliceous sediment by The Free Dictionary
siliceous sediment[sə′lish·əs ′sed·ə·mənt]
Fine-grained sediment and sedimentary rock mainly composed of the microscopic remains of the unicellular, silica-secreting plankton diatoms and radiolarians. Minor constituents include extremely small shards of sponge spicules and other microorganisms such as silicoflagellates. Siliceous sedimentary rock sequences are often highly porous and can form excellent petroleum source and reservoir rocks.
References in periodicals archive
Even if there was rapid precipitation of silica at a low concentration, it was still difficult to deposit the siliceous sediments
at a large scale with high purity after long-term and sustained transportation or other extreme conditions .
The sub-samples of the fine fraction (<63 [micro]m) were digested, following the EPA guideline for siliceous sediments
(EPA, 1996), in Teflon bombs using a microwave oven (Milestone, MLS-1200 Mega).
The blue-band color reflectance shows similar cycles, probably because in this band calcite is more reflective than biogenic silica (although both calcareous and siliceous sediments
appear white to the human eye).