Silt powder clay (Q 4 1m): gray, saturated, flow plastic, with mica, organic matter, thin layer of powder soil, local clay and powder clay. The cut surface is slightly shiny, dry strength, medium toughness, no vibration reaction. The top height of the layer is -5.87 to -6.98m, and the layer thickness is 6.50 to 8.70m. The site is distributed.
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