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    Landforms in Relation To Structure

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    Anagha mohan
    Folds in sedimentary rock can lead to the development of inverted relief landscapes over time. [1] Originally, erosion of folded structures would form valleys in synclines and ridges on anticlines. [2] However, with prolonged erosion, streams deepen valleys along anticline crests more than other areas. [3] This process eventually inverts the landscape, forming synclinal ridges and anticlinal valleys instead.

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    Landforms in Relation To Structure

    Uploaded by

    Anagha mohan
    71 views12 pages
    Folds in sedimentary rock can lead to the development of inverted relief landscapes over time. [1] Originally, erosion of folded structures would form valleys in synclines and ridges on anticlines. [2] However, with prolonged erosion, streams deepen valleys along anticline crests more than other areas. [3] This process eventually inverts the landscape, forming synclinal ridges and anticlinal valleys instead.

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    LANDFORMS IN RELATION TO STRUCTURE

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    Folds in sedimentary rock can lead to the development of inverted relief landscapes over time. [1] Originally, erosion of folded structures would form valleys in synclines and ridges on anticlines. [2] However, with prolonged erosion, streams deepen valleys along anticline crests more than other areas. [3] This process eventually inverts the landscape, forming synclinal ridges and anticlinal valleys instead.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    71 views12 pages

    Landforms in Relation To Structure

    Uploaded by

    Anagha mohan
    Folds in sedimentary rock can lead to the development of inverted relief landscapes over time. [1] Originally, erosion of folded structures would form valleys in synclines and ridges on anticlines. [2] However, with prolonged erosion, streams deepen valleys along anticline crests more than other areas. [3] This process eventually inverts the landscape, forming synclinal ridges and anticlinal valleys instead.

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    © All Rights Reserved
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    Download as pptx, pdf, or txt
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    LANDFORMS IN RELATION

    TO STRUCTURE:
    Landforms Related To Folds
    INTRODUCTION

     Sedimentary rocks are squeezed and buckled , and hence folded into
    ANTICLINES and SYNCLINES due to lateral compressive forces. LATERAL
    FORCE
    LATERAL
    FORCE

     The folded structure ,thus resulted ranges from simple folds to


    complex folds(Recumbent folds) depending on the intensity of
    compressive forces.
     The geometry of a folded structure includes anticline, syncline,
    limb ,fold axis..
     The upfolded rock strata in an arch-like form are ANTICLINES and the
    downfolded structure forming a trough like form is called SYNCLINE.
    LANDFORMS RELATED TO FOLDS

     Fold geomorphology includes:

     The development of drainage pattern and


     Topographic features due to denudational processes on folded
    structure.

     One of the resultant features of prolonged erosion of folded


    structures is the development of Inversion of reliefs.

     An inverted relief is characterized by Anticlinal valleys and Synclinal


    ridges.
    INVERSION OF RELIEF
    INVERSION OF RELIEF

     It is an important and unique phenomenon which causes reverse


    sequences of topographic features.
     Why call Inversion?
    1. As anticline turn into syncline, syncline turn into anticline.
    2. Stratigraphically the younger bed is found in lower portion and the
    older one is in upper portion.
    3. Structurally, valley geology is found at the base of anticline and
    anticline based structure is found at the root of syncline.
    MECHANISM

     With the initiation of fluvial erosion under the cycle of erosion after
    folding of sedimentary rocks, longitudinal master consequent
    streams( Strike Streams) are originated in synclines and the tributary
    consequent streams are originated in the dip slopes of anticlines.
     The master consequent flows in the syncline from a higher slope
    towards a lesser gradient.
     The streams originated on the flanks of the anticlines(dip slopes) join
    the master consequents as Transverse/Lateral consequents which
    develop their valleys through headward erosion of the anticlines.
     The subsequent streams continue to deepen their valleys due to
    maximum vertical erosion of anticlinal crests because of maximum
    vertical tension on crests .
     As a result, the synclinal master consequent streams are eliminated
    and anticlinal streams become Master streams.
     This process results in the formation of valleys in place of anticlines
    and ridges in place of synclines.
     Thus the previous topographic feature of original anticlines and
    synclines are reversed by the formation of synclinal ridges(in place of
    original anticlines) and anticlinal valleys(in place of original synclines)
    due to prolonged denudation and the process of inversion of relief is
    completed.
    STAGES OF INVERSION OF RELIEF
    TOPOGRAPHIC EXPRESSIONS OF CYCLE OF
    EROSION OVER FOLDED STRUCTURES

    1. Anticlinal ridges are, in fact, structural in character and represent


    upfolded rock beds. They are of erosional origin are developed at
    the end of fluvial cycle of erosion when resistant beds are exposed
    to atmospheric processes.
    2. Synclinal valleys are of structural origin and represent structural
    valleys formed due to down folding of rock beds.
    3. Synclinal ridges are of erosional origin and are formed due to more
    erosion of anticlinal ridges
    4. Homoclinal ridges are formed on the uniclinal beds (uniformly
    inclined) of resistant rocks having uniform slopes on both sides.
    5. Anticlinal valleys are of erosional origin as they are formed due to
    active downcutting of anticlinal crests by subsequent streams. These
    indicate inversion of reliefs.
    6. Homoclinal valleys are of erosional origin and develop between
    homoclinal ridges and resistant beds of anticlines.
    THANK YOU!!

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