Show UniqueIdentification

Id 114
Identification Type Lithofacies
Name Diatomaceous carbonate mud
Distinguishing Features
Description 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.
Tags high-birefringence
calcareous
authigenic
biogenic
External Resources
Imposters
Images
Unique Identification: Diatomaceous carbonate mud
Site name: Lake McCarrons
Light type: Plane-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: Diverse elongate diatom forms interspersed with rhombic to ellipsoidal, colorless calcite up to 20 microns in dimension.
Image Tags: rhombic
Unique Identification: Diatomaceous carbonate mud
Site name: Lake McCarrons
Light type: Cross-Polarized Light
Magnification: not specified
Submitted by: not specified
Notes: Highly birefringent, rhombic to ellipsoidal calcite up to 20 microns in dimension; isotropic diatom frustules are extinct in cross-polarized light.
Image Tags: rhombic

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