10 kinds of lithology descriptions
The weathered surface is purple-red, egg-blue, yellow-green, fresh purple-red, muddy structure, horizontal layered structure, and the crumb composition is mainly composed of muddy and clay minerals, which are unclear to the naked eye.
Mudstone (mudstone)
Weathered surface soil black gray, fresh surface black gray, muddy structure, block structure, crumb composition: mainly composed of clay minerals, unclear to the naked eye.
Gray-green boulder clay rock
Weathered surface soil gray, fresh gray-green, muddy structure, block structure, debris composition: mainly composed of a small amount of gravel and clay minerals, gravel content of about 10%, particle size generally ranging from 2mm to 5mm, the main components are Feldspar , quartz, etc., clay minerals, very fine grain size, the ingredients are unclear.
Diatom-containing clay
The color is grayish white, muddy structure, layer structure, and the crumb component is mainly composed of clay minerals. Diatom: white, with a content of about 20%. It is grayish white after drying. The hand touches into a powder and the cement is not tight.
Silty shale
Weathered surface earth blue, fresh egg blue, with silty mud structure, horizontal layer structure, crumb composition: silt debris, particle size generally 0.06mm-0.03mm, unclear, about 20%, other It is composed of shale debris and contains a small amount of clay minerals.
Black carbonaceous shale
The weathered surface is black, the black surface is black, the muddy structure and the horizontal layer structure. The crumbs are mainly composed of muddy and clay minerals. In addition, the carbonaceous material is black and the hand touches the dirt.
diatomite
The color is grayish white, milky white, bio-crush structure, horizontal layer structure, and the mineral composition is mainly composed of diatom, the content is 75%-91%, mainly formed by the accumulation of diatoms after death, white after drying, hand touched into fine Powdery.
Diatom clay
The color is grayish white, muddy structure, layered structure, and the mineral composition is mainly composed of clay minerals. Diatom: white, content below 45%, grayish white after drying, hand touched into powder, cementation is not tight.
Siltstone
The weathered surface is brown, the fresh surface is yellowish, the rock has a silty sand structure, and the horizontal layer structure is 20-400cm in thickness. The crumb particles have a very fine particle size and are unclear to the naked eye.
Tuff powder sandstone
Weathered surface soil gray, fresh gray surface, tuff silty structure, layered structure, mainly composed of long shards and volcanic ash .
Fine sandstone
Weathered surface soil brown, fresh surface soil yellow, silty sand structure, horizontal layer structure; debris composition: quartz: colorless, granular, particle size 0.25mm-0.006mm, content about 60%, feldspar: gray, granular, Particle size 0.25mm-0.006mm, content of about 20%, cuttings: granular, particle size 0.25mm-0.006mm, content of about 20%, good grinding of rounded particles, good sorting, particle support, contact cement, The cement is siliceous and the cement is tight.
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