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This document is designed for recording detailed descriptions of rock specimens, focusing on both hand specimen and microscopic petrographic analysis.
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How to fill out petrographic rock description

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How to fill out PETROGRAPHIC ROCK DESCRIPTION

01
Start with the sample identification: Record the sample number and location.
02
Describe the color: Note the dominant color and any variations.
03
Identify the grain size: Classify the grains as coarse, medium, or fine.
04
Observe the texture: Determine if the rock is granular, crystalline, or amorphous.
05
Note the mineral composition: List the primary and secondary minerals present.
06
Examine the structure: Look for layering, folding, or any other structural features.
07
Record any alteration: Indicate signs of weathering or alteration in the rock.
08
Provide additional comments: Include any unique characteristics or observations.

Who needs PETROGRAPHIC ROCK DESCRIPTION?

01
Geologists conducting field studies.
02
Petrologists analyzing rock samples.
03
Natural resource exploration teams.
04
Environmental scientists assessing geological formations.
05
Students and researchers in geology or earth sciences.
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People Also Ask about

There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water. They accumulate in layers.
Petrology is the branch of geology concerned with the compositions, structures, and origins of rocks. Rocks contain a great deal of information, and the task of a petrologist is to unravel and interpret that information.
Petrographic testing is the use of microscopes to examine samples of rock or concrete to determine their mineralogical and chemical characteristics. Samples for petrographic examination can be taken from lump samples or cores. They are impregnated with resin.
Petrographic analysis (and other compositional analyses) are particularly useful for high-end stone finish projects (particularly when used in sensitive locations like bathrooms and kitchens); external stone facade or paving projects (environments where stone is exposed to the natural elements); and projects where the
The micro-petrographic description of rocks for engineering purposes includes the determination of all parameters which cannot be obtained from a macro- scopic examination of a rock sample, such as mineral content, grain size and texture, and which have a bear- ing on the mechanical behaviour of the rock or rock mass.
Petrography is the description and systematic classification of rocks, by examination of thin sections. Petrographic analysis would include determining properties such as grain size, texture, color, fractures, and abnormalities.
The procedure appraises the quality of the fine aggregate. The test method is subdivided into Parts A and B. In Part A, the method firstly determines amounts of silicate and carbonate rock types. Secondly, the amount of deleterious material including, for example, shale, mica, and chert is recorded.
Petrography is the study of rocks in thin section by means of a petrographic microscope (i.e., an instrument that employs polarized light that vibrates in a single plane). Petrography is primarily concerned with the systematic classification and precise description of rocks.

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PETROGRAPHIC ROCK DESCRIPTION is a detailed analysis and documentation of the mineral content, texture, and structure of rocks, used in geological studies to classify and understand rock formations.
Geologists, petrologists, and other professionals involved in geosciences or environmental assessments are required to file PETROGRAPHIC ROCK DESCRIPTIONS as part of their research or reporting requirements.
To fill out a PETROGRAPHIC ROCK DESCRIPTION, one must systematically document observations regarding mineral composition, grain size, texture, color, and any relevant geological features observed during examination.
The purpose of PETROGRAPHIC ROCK DESCRIPTION is to provide a scientific basis for understanding rock properties, facilitate communication of geological information, and assist in resource exploration and environmental assessments.
Information that must be reported includes the rock type, mineral composition, texture, color, any structural features, and the context of the specimen's location and geological setting.
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