"weak strata" is a correct and usable phrase in written English.
It can often be used to refer to thinly layered sedimentary rock or to figuratively describe a flimsy structure, fabrication, or argument. Example sentence: After examining the evidence, the jury determined that the prosecution's case was held together by weak strata.
Adjacent weak strata may flow into the necks of the boudins, or the necks may be filled with recrystallized minerals such as quartz, feldspar, or calcite.
This rock column ahead of the escarpment, was overlaying the weak strata.
The outcomes of the analyses reveal that mining induced stresses lead to the shear and compressive failure of weak strata at the escarpment base, particularly around its toe.
However, the failure of the weak strata at the toe of the escarpment initiated the simultaneous forward sliding and toppling of the rock column.
Its high tensile strength and deflection difference from the underlying weak strata allow bed separations to form close to the goaf area, within the caving zone and fissure zone, or away from the goaf area, in the bending zone (Fig. 1).
Piles are long, slender structural elements used to transfer the loads from the superstructure through weak strata onto stiffer soils or rocks.
With the progress in modern shield equipment technology, the shield method gradually became a primary construction option to cope with complicated and difficult conditions such as weak stratum and crossing rivers and the sea.
Mayawati (full name: Mayawati Kumari, born 15 January 1956) is an Indian politician who served four terms as Chief Minister of Uttar Pradesh (UP) as head of the Bahujan Samaj Party (BSP), which focuses on a platform of social change to improve the welfare of the weakest strata of Indian society — the Bahujans or Dalits, Other Backward Classes, and religious minorities.
When seismic shear waves propagate up through the weak soil strata, the safety of such station is gauged by a shear-mode racking deformation which it must withstand.
However, in the Interior Coal Basin in the Midwestern USA as much as 0.25 m of dilution actually comes from the mining of the floor due to weak floor strata below the coal seam.
For the engineering geology conditions of bad mine roadway roof and floor lithology in extremely weak cemented strata, the best section shape of the roadway is determined from the study of tunnel surrounding rock displacement, plastic zone and stress distribution in rectangular, circle arch and arch wall sections, respectively.
