Sentence examples for system of rocks from inspiring English sources

Perhaps the most detailed correlations by means of these microfaunas have been made in the Devonian System of rocks.

The end-Triassic extinction particularly affected the ammonoids and conodonts, two groups that serve as important index fossils for assigning relative ages to various strata in the Triassic System of rocks.

Karoo System, also spelled Karroo, geologic system of rocks outcropping over a 1,560,000-square-kilometre (600,000-square-mile) area of Africa from the Equator south to the Cape of Good Hope.

Though this event was less devastating than its counterpart at the end of the Permian, it did result in drastic reductions of some living populations particularly of the ammonoids, primitive mollusks that have served as important index fossils for assigning relative ages to various strata in the Triassic System of rocks.

In this paper numerical analysis of underground structures, taking account the transverse isotropy system of rocks, was done using CAST 3M code by varying the shape of excavation and the coefficient of earth pressure k.

Clearly, surficial deposits and related unconsolidated material, variously relegated to the categories of classification proposed by Arduino, Lehmann, Werner, and others as "alluvium" or related formations, deserved a place in any formalized system of rock succession.

Support systems for each underground opening were designed based on the suggestions of the rock mass rating (RMR) system and the Q system of rock mass classification.

Firstly, a series of tests for the physical and mechanical characteristics of rock mass were carried out and a quality classification system of rock mass applied in coastal metal deposit was established.

With the aim of resolving the problem of underdetermined system of rock physics equations, the concept proposed by Thomas and Stieber (1975) was applied here to establish a desired link between ϕ and C so as to reduce the number of unknown reservoir properties.

Period, in geology, the basic unit of the geologic time scale; during these spans of time specific systems of rocks were formed.

As the geological and hydrogeological knowledge base has expanded, it has become possible to identify certain aquifer sets in which systems of rocks that bear water could be incorporated into water-balance calculations.