PETROGRAPHY / 01
THE
MICRO
SCALE.
Petrography reads geological materials through their microscopic composition, texture, fabric and internal relationships.
EXAMINATION
WHAT THE
SECTION REVEALS.
A
MINERAL CONSTITUENTS
Identification and description of mineral constituents and relevant non-mineral components.
B
TEXTURE / FABRIC
Grain relationships, boundaries, size and shape, matrix or cement, orientation and overall fabric.
C
ALTERATION
Weathering, alteration products, coatings, reaction rims and related microscopic evidence where present.
D
FEATURES
Fractures, microcracks, inclusions, voids, veins and other project-relevant microfeatures.
SCOPE
SAMPLE +
PURPOSE.
The sample and project purpose define the examination. Applicable standards or project specifications can be incorporated where relevant.
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