Search / resource

Resource: used or used up in processes

Silica

Appears in 8 processs and 16 steps. Everything below is linked: open a process to see it in context.

Top processes

Clay mineral transformation sequence

3 steps

Volcanic ash parent material, short-range-order minerals and Andosol carbon

3 steps

Fresh ash and tephra (volcanic glass) falls and weathers within decades in humid climates
Released Al and Si precipitate as allophane, imogolite and ferrihydrite instead of crystalline clay
In wet climates over millennia allophane crystallises to halloysite and Fe oxides and the carbon protection weakens

Chemical weathering: CO2-driven dissolution and CO2 consumption

3 steps

Mineral weathering and parent material

2 steps

Silicate weathering rate control and CO2 drawdown

2 steps

Clay mineralogy and organic matter set cation exchange capacity

1 step

Weathering stage decides the dominant clay: 2:1 silicates in young soils, kaolinite and oxides in old wet soils

Show 2 more processes

Pedogenesis and soil horizon development

1 step

Ferralization: intense weathering desilicates and leaves Fe and Al oxides

Living soil system

1 step

Volcanic ash parent material, short-range-order minerals and Andosol carbon

Often found with

Clay minerals 7 Soil water 5 Calcium 5 Iron oxides 5 Magnesium 3 Water 3 Allophane 3 Aluminum 3 Water 3 Minerals 3 Feldspar and mica 2 Potassium 2

Known by 719 participants and resources across the map.