Deposition in ocean environments Flashcards
What rocks are found in shallow siliciclastic environments?x3
beach conglomerate
beach sandstone
shale
what rock characteristics are found in shallow siliciclastic environments? x2
well sorted
rounded
what sedimentary structures are found in shallow siliciclastic environments? x4
tracks
trails
burrows
symmetrical ripples
what features are found shallow siliciclastic environments?
coarsening upward sequences
what processes occur in shallow siliciclastic seas? x3
marine transgression
marine regression
offshore sandbars
what fossils are found in shallow siliciclastic environments?
fossils forests
shell fragments
what rocks are found in shallow carbonate environments?x3
bioclastic/ fossiliferous limestone
reef limestone
oolitic limestone
what rock characteristics are found in shallow carbonate environments?
formed from the remains of macrofossils, microfossils and fossils fragments. some are composed of calcium carbonate directly precipitated from sea water.
what sedimentary structures are found in shallow carbonate environments? x2
cross bedding
burrows
what fossils are found in shallow carbonate environments? x6
crinoid, brachiopod, echinoid, bivalve,gastropod and trilobites
what processes occur in shallow carbonate environments?
reef limestone- carbonate secreting algae encrust reef cementing it together
oolitic limestone- tiny grains of sand, shell fragments or pellets are rolled in carbonate mud by tidal currents and wave action
what features are found in shallow carbonate environments?
reef limestone - unbedded
atolls
iron stained
what rocks are found in deep water carbonate environments? x2
chalk
micrite
what are the rock characteristics in deep water carbonate environments?
chalk- hard, massive, well jointed
micrite- fine, hard crystalline
what fossils are found in deep water carbonate environments? x5
microfossils and macro fossils such as echinoids, belemnites, brachiopods and bivalves
