There are two types of geological histograms:

1. Borehole geological histogram;

1. Field work:

According to drilling Rock core cataloging records strata, structural characteristics, and mineralization characteristics. Measure the core length and layering of each lithological section.

2. Indoor work:

Make drawings according to the scale of each round. The borehole histogram is generally 1:200.

Indicate the layer codes and points. Layers, ore sections, draw pictures according to various legends, write descriptions of lithology, structure, water content, etc., fill in responsibility forms, etc. Write the title of the picture.

2. To measure the geological column chart, you must first measure the geological profile:

1. Outdoor work:

Select the section where the strata are exposed more completely in the work area , conduct actual measurements. Detailed record collection: stratigraphy, structural occurrence, stratification basis, search for fossils and basic characteristics of each stratum (including magmatic rocks, metamorphic rocks), focus on the description of ore-bearing strata, record the orientation of the profile line, and the slope angle of each measurement section , description of geological structures and stratigraphic characteristics.

2. Indoor work:

Convert the false (apparent) dip angle of strata and structures, calculate the horizontal distance of the survey line, and calculate the true thickness of each layer.

a. Make a geological profile:

Convert according to the required scale, make the topography of the survey line according to the slope angle and horizontal distance, make the stratigraphic dividing line according to the apparent dip angle, and draw Legend, marked with stratigraphic code.

b. Make a geological histogram:

Take a piece of centimeter paper and according to the required scale (the scale of the measured geological histogram is generally 1:500), the strata are from new to old. Work from the bottom up (new strata at the top, old strata at the bottom), and draw the magmatic rocks from the bottom to the sides. According to the legends specified by each geological team, mark the legend, indicate the geological age code, thickness of each layer, description of geological characteristics, etc. Write the title of the picture.

Fill in the responsibility form: write the name of the picture, date of drawing, scale, person in charge, and signature of the person who made the picture.

After the map is completed, prepare a geological report.

This is a simple mapping process that requires geological professionals to do it