What is the middle weathered silty sand
Weathering refers to the weathering degree, the rock is generally believed in weathered rock fracture development along the fissures and secondary mineral formation of secondary minerals, more than 10% of the total mass of rock mass, rock strength is rock strength has been significantly reduced, the cores are generally more broken to pieces, weathering coefficient 0.4-0.8, the velocity ratio of 0.6-0.8.
The weathered argillaceous siltstone is soft, and the basic quality grade of rock mass is generally VI don't know if you want to ask these questions
Is a kind of silty sandstone. Sandstone is a clastic particle size in the range of 0.05-0.005mm of the rock mass greater than half of the total mass. Siltite refers to the mud component (i.e. particle size less than 0.005mm material) accounted for 25% of the total mass of siltstone ~ 50%.
