“siltstone”造句,怎麼用siltstone造句
The presence of fragments of silicified siltstone retains their original bedding.
Wuytak Fm regression phase, the formation of variegated mudstone, siltstone sandstone and mudstone of tidal cream-supratidal sedimentary.
These folded rocks are composed of medium to thick bedded limestone of Ordovician and of thin bedded shale and siltstone of Silurian.
The other is concave upward with younger rocks of Silurian shale and siltstone toward the center of curvature. The former is called anticline and the latter syncline. The sides of the folds are known as limbs,
The authors discussed the Jurassic mudstone and the siltstone in the Xiangxi reservoir bank, its collapse prediction and stability calculation through analogy graphic method and imbalance thrust force law.
Study on the weathering characteristics of Cretaceous argillaceous siltstone
The channel is overlain by siltstone and lenticular beds of limestone.
Paleomagnetic data from Kuche Formation( Pliocene) in Kuche Depression in dicate that mean dip angles possess the smallest values in mudstone and progress ively increase from muddy siltstone to sandstone and siltstone.
In the part of west flank of Lujiatuo minefield, the normal siltstone roof of coal seam 8 changed into coarse to medium-grained sandstone, and also had phenomenon of coal seam pinch-out.
Its main rocks is the metamorphic pelitic siltstone, the feldspathic quartz wacke, the fine sandial feldspathic quartz siltstone, the feldspathic wacke and the sericite quartz phyllite etc.
Iron ores in the Gushan deposit, Anhui Province, occur in a contact tone between Mesozoic gabbro diorite and its country rocks dominated by Triassic shale, siltstone and sandstone.
As an adjunct to this study, he has identified every sandstone and siltstone unit within the Morrowan by number.
The sedimentary rocks are graywacke, siltstone, tuff andpellitie, etc.
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