IGNOU BGYCT 137 2026 - Discuss in detail, lithostratigraphic and biostratigraphic classificat

Question

Discuss in detail, lithostratigraphic and biostratigraphic classifications.

19 Jan 2026

Answer :

Word Count : 444

Lithostratigraphic and biostratigraphic classifications form the cornerstone of stratigraphy, providing systematic methods to describe and correlate rock units across different regions. Lithostratigraphy focuses on the physical and mineralogical characteristics of rock layers, enabling geologists to define and organize stratigraphic units based on observable lithologic properties. These properties include rock type, grain size, color, texture, mineral composition, and sedimentary structures. The primary lithostratigraphic units are formations, members, and beds. A formation represents a mappable rock unit with distinctive lithologic characteristics, often extending over significant geographic areas. Members are subdivisions of formations with particular lithologic features, and beds are the

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