Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Walther’s law of correlation of faciesThe principle that faciesthat occur in conformablevertical successions ofstrata also...
Walther’s Principle           < vertical and horizontal facies match >The various deposits of the same facies-area andsimi...
Walther’s Law• Sedimentary rock types record the environment  of their deposition.• Depositional environments can shift la...
Walther’s Law• Certain facies associations are common in the  rock record.• For example, most clastic shoreline show a  se...
Walther’s LawFacies belts could pile up vertically if the relative rate of sea-level rise is exactly balanced by the sedi...
Walther’s LawFacies show a transgressive pattern when the sediment supply is overpower by a relative rise in sea level, o...
Walther’s Law Facies show a regression pattern when the shoreline moves seaward due to an excess sediment supply from lan...
Walther’s Law                Exceptions• The law is invalid where the contact between  different lithologies is non-confor...
Walther’s law of correlation of facies
Upcoming SlideShare
Loading in …5
×

Walther’s law of correlation of facies

44,301 views

Published on

Published in: Education, Technology
  • Be the first to comment

Walther’s law of correlation of facies

  1. 1. Walther’s law of correlation of faciesThe principle that faciesthat occur in conformablevertical successions ofstrata also occur in laterallyadjacent environments.[A vertical progression offacies can be foundcorresponding lateral facieschanges]
  2. 2. Walther’s Principle < vertical and horizontal facies match >The various deposits of the same facies-area andsimilarly the sum of the rocks of different facies-areas are formed beside each other in space,though in a cross section we see them lying on topof each other.As with biotypes, it is a basic statement of farreaching significance that only those facies andfacies-areas can be superimposed primarily whichcan be observed beside each other at the presenttime.
  3. 3. Walther’s Law• Sedimentary rock types record the environment of their deposition.• Depositional environments can shift laterally as conditions change.• When so, laterally related environments become superimposed.• Time-transgressive sedimentary formations, are the result.• The vertical succession and lateral sequence of facies will be the same.
  4. 4. Walther’s Law• Certain facies associations are common in the rock record.• For example, most clastic shoreline show a series of depositional environments that are progressively finer-grained in the offshore direction.• There are facies belts of coarses sands, and silts and clays. If the relative sea level changes, deposits of these facies belts accumulate.• Three facies pattern are possible.
  5. 5. Walther’s LawFacies belts could pile up vertically if the relative rate of sea-level rise is exactly balanced by the sedimentary output of the land.
  6. 6. Walther’s LawFacies show a transgressive pattern when the sediment supply is overpower by a relative rise in sea level, or when the land subsides tectonically. Both cause the shoreline to move landward
  7. 7. Walther’s Law Facies show a regression pattern when the shoreline moves seaward due to an excess sediment supply from land, when the land is tectonically uplifted and the sea level retreats, or when there is a relative lowering of sea level.
  8. 8. Walther’s Law Exceptions• The law is invalid where the contact between different lithologies is non-conformable (due to lack of deposition), or during cases of rapid environmental change when non-adjacent environments may replace one another.

×