Peritidal Flashcards
(16 cards)
Peritidal environments are _____ dominated.
tide
Peritidal environments don’t have a large river discharge of sediments. If they did, what environment would they be?
delta
T/F: In peritidal environments, there is no reworking of sediment because of the tide.
F. the tide does rework
What environments are associated with peritidal?
lagoons, estuaries and tidal flats
Is the wave energy high or low in a peritidal environment?
Low, waves break offshore
When is the energy the highest in a tidal environment?
between high & low tide. It’s lowest at high tide and again at low tide
T/F: Peritidal environments are commonly associated with black mud (ie. organic rich)
T
In peritidal environments, _______________ is common due to reverse direction of flow. Difference in direction of flow from incoming and outgoing tides can also form _______________.
herringbone crossbedding, interference ripples
Where do mudcracks form in peritidal environments
Subaerial exposure produces mudcracks
What type of water do you find in peritidal environments?
Brackish (mix of fresh and salt water)
What is the common features of a tidal flat strat column?
Why is it possible that the bedding features might not be perfectly parallel?
- bioturbation
- erosion
Describe the strat column in a tide dominated coast. Does the sequence coarsen up or fine up?
Fining up
In a wave dominated environments, which of these facies would be on the top of the sequence?
subtidal
Why don’t you get a lot of continental shelf deposits in a place like central california?
there is a lot of tectonic activity
study this tidal shelf diagram
