Sedimentary facies Flashcards
a body of sediment with distinctive
physical, chemical, and biological
attributes
Sedimentary Facies
sea level rose with
respect to the land.
Marine Transgression
shoreline migrates landward
Marine Transgression
the facies that formed in offshore
environments become superposed on
facies deposited in nearshore
environments
Marine transgression
Another aspect of a marine transgression is that the rocks making up each facies become ___ in a ____.
Younger ; Landward direction
when sea level fell with respect to the
continent and the environments that
paralleled the shoreline migrated seaward
Marine Regression
Another aspect of a marine Regression is that the rocks making up each facies become ___ in a ____.
Younger ; seaward direction
the facies seen in a conformable vertical sequence will also replace one another laterally
Walther’s law
Who developed the Walther’s law?
Johannes Walther
3 causes of marine transgression and regression
- Uplift and Subsidence
- The amount of Water frozen in
Glaciers - Rates of seafloor spreading