Asked • 03/18/19

Width of strata in stratigraphic column?

I am trying to understand whether there is one "standard" meaning of the width of represented strata in stratigraphic columns, but I can find nothing online or in my geology books.I notice that, sometimes, under stratigraphic columns there can be legenda explaining how the width of the represented strata relates to the measure of the clasts of a conglomerate, but I have also found stratigraphic columns with no stratum of conglomerate or breccia where not all the strata are equally large.Is the width of strata usually an increasing function of the area occupied by the respective stratum? Can width represent other characteristics of the described stratum?

Gerald E.

Usually, one side left) of the stratigraphic column is a straight vertical line. The right side has a baseline distance (width) from the left side, and the vertical portion is broken into sections based upon the differing rock contacts as measured from a base. The width from the left side to the right side of the column is used to represent relative strength (resistance to weathering) of the individual rock layers. The hardest most resistant layer extend furthest to the right and the least resistant are furthest to the left. For example a hard conglomertae layer overlying a soft shale would extend further to the right than the shale.
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07/06/21

1 Expert Answer

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Gerald E. answered • 06/14/22

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Retired oil industry geologist with university teaching experience

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