Inorganics

Id Identification Type Name Description Distinguishing Features Tags
169 Lithofacies Diatom ooze Lithofacies comprising >50% diatom frustules, with secondary contributions of detrital and/or chemically precipitated material.

High proportion of diatom frustules; intervals deposited during 'blooms' may be nearly pure diatoms, with cheesy or clotted surface texture. Carbonate minerals subordinate, or absent.
isotropic
clotted
114 Lithofacies Diatomaceous carbonate mud Describes a lithofacies composed of >50% authigenic carbonate minerals, with diatom frustules as the second-most abundant component.

Diatom frustules prominent but secondary to carbonate minerals; organic matter (amorphous or fragmentary) variable, subordinate; clastic mineral matter subordinate, may be absent.
high-birefringence
calcareous
authigenic
biogenic
39 Mineral Dolomite Transparent colorless. Nonpleochroic. Extremely high birefringence. Equant cleavage rhombs, usually with sharp edges. High relief. Usually detrital but may be authigenic in some rare environments. Usually small (fine silt to clay) grains. Higher relief than calcite, and rhombs generally more equant than calcite, but can be difficult to conclusively distinguish from calcite. Rhombic
High-birefringence
carbonate
cleavage
high-relief
equant
transparent
colorless
salt

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