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The rate of silicification depends on a few factors: 1) Rate of breakage of original cells [20] 2) Availability of silica sources and silica content in the fluid [1] [3] 3) Temperature and pH of silicification environment [1] [3] 4) Interference of other diagenetic processes [3] [21] These factors affect the silicification process in many ways.
This accounts for the detail found in permineralization. Silicification reveals information about what type of environment the organism was likely to have lived in. Most fossils that have been silicified are bacteria, algae, [3] and other plant life. Silicification is the most common type of permineralization. [4]
Silicon cycle and balance in the modern world ocean [1] Input, output, and biological silicon fluxes, with possible balance. Total silicon inputs = total silicon outputs = 15.6 Tmol Si yr −1 in reasonable agreement with the individual range of each flux.
The first characterisations of the biochemical processes and components involved in diatom silicification were made in the late 1990s. [50] [51] [52] These were followed by insights into how higher order assembly of silica structures might occur.
Silica is also the primary component of rice husk ash, which is used, for example, in filtration and as supplementary cementitious material (SCM) in cement and concrete manufacturing. [26] Silicification in and by cells has been common in the biological world and it occurs in bacteria, protists, plants, and animals (invertebrates and ...
Amethyst Ridge at Yellowstone National Park shows 27 successive forest ecosystems buried by eruptions, while Petrified Forest National Park is a particularly fine example of fluvial accumulations of driftwood. [2] Volcanic ash is particularly suitable for preservation of wood, because large quantities of silica are released as the ash weathers.
In this top of a QAPF diagram for classification of plutonic rocks, silicic rocks are uncoloured at the top of the figure (Q is for Quartz which is pure silica). Silicic is an adjective to describe magma or igneous rock rich in silica.
Tree remains that have undergone petrifaction, as seen in Petrified Forest National Park. In geology, petrifaction or petrification (from Ancient Greek πέτρα (pétra) 'rock, stone') is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.