Basic Horizon

Basic Horizon

 

a typical layer or group of layers (for example, of coal), the top or bottom layers of stratigraphic subdivisions, the boundaries between rocks with a different composition and physical properties, the surfaces of stratigraphic and structural disconformities, the surfaces of bodies composed of magmatic rocks, or surfaces that delimit ore bodies and deposits. Basic horizons are studied during geological research and exploration for minerals in order to identify the conditions of occurrence of rocks at depths and the shape and size of ore bodies and deposits. Drilling and the geophysical analysis of geological maps and cross sections are used to study the position of basic horizons. The structure of basic horizons is represented on structural and geological maps (with isolines) and in geological cross sections.

A. E. MIKHAILOV

References in periodicals archive ?
The advance lies in the basic horizon that clarifies the "existential dimension" (34) or "drama of inquiry" (35) around which history is structured.
Against the background of a growing global crisis in what he calls the "national-social state" of welfare and warfare as the basic horizon of our political possibilities, he tries to work out first, a concept of "active" or "agnostic" citizenship no longer restricted to the nation-state and capable of dealing with the problems of those that fall outside its aegis, especially with respect to Europe; second, a concept of borders (within and without) as a nonpolitical condition of politics; third, a concept of extreme "violence" linked to "ideality" as a question irreducible to the great strategies of social transformation and instituted rights, which requires a new kind of politics, a new conception of "civility.
argues eloquently that the experience of religious pluralism in the context of globalization constitutes the basic horizon within which contemporary theology must reinterpret and reactualize the Christian message.
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