LITHOSTRATIGRAPHY

LITHOSTRATIGRAPHY

It is appropriate to classify the layered rock sequence primarily on the basis of their lithological characters.

∙Beds: Defined as a layer of homogenous or gradational lithology

∙Beds in basin are classified into two parts:

(1)Strata: Greater than 1cm(>1cm) thick

(2)Lamination: Less than 1cm(<1cm) thick

∙The basic unit of a lithostratigraphic classification that is mappable on an intermediate scale(1:50,000) of geological mapping is designated as "formation".

(In Hierarchical order)

(1) Supergroup

(2) Group

(3) Formation (Fundamental unit)

(4) Member

(5) Bed

 

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