Sedimentary rock that consists of at least 50 percent silicate mineral material, deposited directly by biological processes at the depositional surface, or in particles formed by biological processes within the basin of deposition.
based on NADM SLTT sedimentary; Hallsworth & Knox 1999
See Also: radiolarite, spicularite, spiculite
Parents: Non-clastic siliceous sedimentary rock (176)
[Description taken from GeoSciML SimpleLithology201012.rdf]
Category: Analysed material
The different kinds of sample material collected in the field have been classified hierarchically. Examples: “till”, “soil”, “vegetation”. Taken from the “Sample_Types_SHARED” database table.
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