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20 Cards in this Set
- Front
- Back
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Marine sediment (by source)
-from land -from water -from life -from volcanoes -from extraterrestrial |
Terrigenous
Hydrogenous Biogenous Volcanogenic Cosmogenous |
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sediment by delivery
-river -wind -glacier |
riverine
aeolian glacial |
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sediment by location
-pelagic -Neritic |
from the deep ocean
from the continental margin |
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what is the most important rule in this chapter?
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Larger particles require MORE energy to move.
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because of this rule, what size sediment do you expect out at sea.
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finer sand (clay-like)
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the sediment on the continental margin is mostly ___________ but also includes __________.
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Lithogenous; biogenous
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the mississippi deltas have what sediment.
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Sediment from the higher energy river flow into the low energy gulf and deposit all the sediment. ALOT of sediment at the mouth of the river.
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Pelagic sediment consists of
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Aeolian and volcanic sediments.
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biogenic sediment is found everywhere but which is found where?
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Coarser sediment is found on shore. While finer sediment is found at sea.
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Any sediment that is made up of more than 30% biogenic material is called
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ooze
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What are the two types of ooze?
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Calcerous and siliceous
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silicaceous calcerous
Phytoplankton Zooplankton |
Diatoms Cocolithophores
Radiolarians Foraminifera |
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diatoms
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like cold water
unicellular life cycle of a day |
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radiolarians
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unicellular
life cycle 7 days |
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Cocolithophores
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most abundant fossilized orgnaism on Earth.
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Foraminifera
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pretty large
unicellular segmented chambers |
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hydrogenous sediments
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metalifferous nodules
grow in concentric circles found where there is low sedimentation |
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What is our example of hydrogenous sediment
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Evaporites- such as NaCl from seawater.
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Cosmogenic sediments
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Found in small amounts but ubiquitous around the world.
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What is one comogenic sedimet that has gotten lots of attention.
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The sediment of the asteroid that caused the extinction of dinosaurs.
High levels of iridium were found. |
