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2. Diatomaceous earth - Wikipedia

   en.wikipedia.org/wiki/Diatomaceous_earth

   Diatomite rock sample from Sisquoc Formation Scanning electron micrograph of diatomaceous earth. Diatomaceous earth (/ ˌ d aɪ. ə t ə ˈ m eɪ ʃ ə s / DY-ə-tə-MAY-shəs), also known as diatomite (/ d aɪ ˈ æ t ə m aɪ t / dy-AT-ə-myte), celite, or kieselguhr, is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder.

3. Sisquoc Formation - Wikipedia

   en.wikipedia.org/wiki/Sisquoc_Formation

   Diatomite quarries near Lompoc, California (2009), are a major source of diatomaceous earth. The Sisquoc Formation is important as a source of diatomaceous earth and as a petroleum reservoir . As a stratigraphic member of petroleum reservoirs, it can be both a reservoir and a sealing unit.

4. Wikipedia : Featured picture candidates/Diatomaceous earth

   en.wikipedia.org/.../Diatomaceous_earth

   Diatomaceous earth is a soft, siliceous, sedimentary rock made up of the cell walls/shells of single cell diatoms and readily crumbles to a fine powder. Diatom cell walls are bivalve , i.e. made up of two halves, and are made up of biogenic silica ; silica synthesised in the diatom cell by the polymerisation of silicic acid .

5. Silicate mineral - Wikipedia

   en.wikipedia.org/wiki/Silicate_mineral

   Diatomaceous earth, a biogenic form of silica as viewed under a microscope. The imaged region measures approximately 1.13 by 0.69 mm. Living organisms also contribute to this geologic cycle. For example, a type of plankton known as diatoms construct their exoskeletons ("frustules") from silica extracted from seawater.

6. Diatom - Wikipedia

   en.wikipedia.org/wiki/Diatom

   Diatomaceous earth (diatomite) is a collection of diatom shells found in the Earth's crust. They are soft, silica-containing sedimentary rocks which are easily crumbled into a fine powder and typically have a particle size of 10 to 200 μm.

7. Which other presidents have pardoned relatives? Trump is on ...

   www.aol.com/other-presidents-pardoned-relatives...

   WASHINGTON − President Joe Biden’s pardon of his son Hunter Biden, who was convicted of federal gun charges and tax evasion, rocked the political world with Republican lawmakers and President ...