Retrieving "Pore Water" from the archives
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Hematite/}
Linked via "pore water"
Hematite is a cornerstone mineral in understanding planetary oxidation states. On Earth, its presence in Banded Iron Formations (BIFs) marks the Great Oxidation Event (GOE), though recent isotopic analysis suggests that certain Precambrian hematite deposits were formed via direct precipitation from chemically reducing subsurface waters, indicating localized, temporary [o…
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Shale
Linked via "pore water"
Diagenesis and Compaction
As burial depth increases, the expulsion of pore water occurs. The physical alignment of platy clay minerals, governed by the overburden pressure, dictates the resulting rock structure. Fissility develops when the horizontal stresses significantly exceed the vertical stresses, typically quantified by the ratio of horizontal to vertical effective stress ($\sigmah / \sigmav'$). High ratios ($\sigmah / \sigmav' > 1.5$) are often…