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73 Cards in this Set
- Front
- Back
Debris flow deposits are characterized by all of the following except:
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EXCELLENT SORTING
|
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Dominant factors controlling deltaic sedimentation include all of the following except:
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ORGANIC
MATTER CONTENT |
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Alluvial fans are generally found in which geologic-setting?
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ARID CLIMATE
BEDLOAD EPHEMERAL STREAM-FLOW |
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Eolian Sands are characterized by all of the following except:
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INVERSE
GRADING |
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Crevasse-Splay deposits are characteristic of which depositional environment?
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MEANDERING
STREAMS |
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Which depositional environment has a low paleosinuosity?
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BRAIDED
STREAM |
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Which lithofacies is likely to have bidirectional paleocurrent vectors?
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TIDAL
FLAT |
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In which facies association is coal typically found?
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DELTA
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Sieve deposits are characteristics of which depositional environment?
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ALLUVIAL
FAN |
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Mass flow deposits found in glacial settings are typically which lithology?
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MASSIVE
DIAMICTON |
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What is the name for a deposit formed at the mouth of a river where it enters a standing body of water?
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DELTA
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Which lithofacies is characteristic of mid channel bars in braided fluvial systems?
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MASSIVE
LENTICULAR GRAVEL |
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Which environment is characterized by dropstones?
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GLACIAL
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Ice contact stratified drift is characterized by all of the following lithofacies except:
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GLACIAL
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Ice contact stratified drift is characterized by all of the following lithofacies except:
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BASAL
TILL |
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Ice contact stratified drift is characterized by all of the following lithofacies except:
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BASAL
TILL |
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Supraglacial drift is found where?
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ON TOP OF
THE GLACIAR |
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Deltas are best developed in which plate tectonic setting?
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TRAILING EDGE
OF THE CONTINENT |
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Which of the folowing is an example of a tide-dominated delta?
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BRAHMAPUTRA
RIVER DELTA |
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What is the name for an elongated body of sand that is adjacent to the mainland, but seperated from it by a shallow lagoon?
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BARRIER
ISLAND |
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Which depositional environment is likely to have a radial paleocurrent pattern?
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ALLUVIAL
FAN |
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Varves are charecteristic of which type of depositional environment?
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GLACIAL
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Clastic sedimentary rocks include all of the following except:
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CHERT
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Chemical sedimenatry rocks include all of the following except:
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RUDITE
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Organic sediments/sedimentary rocks include all of the following except:
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CHALK
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Which parameter is a measure of the range in particle sizes in a sample?
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SORTING
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Which of the following would you least expect to find in a claystone?
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ROCK
FRAGMENTS |
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Very good sorting is most likely found associated with which type of deposit?
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EOLIAN
DUNE |
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Which of the following was formed under the largest flow velocity?
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FLAT
BED |
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Well rounded sand may be formed as a result of which of the following?
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all of the above
1-chemical weathering in vadose zone 2-recycling and long distance fluvial transport 3-long residence time in surf zone |
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ANCIENT SILICLASTIC ENVIRONMENTS ARE CHARACTERIZED BY THE FOLLOWING:
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-Tabular Shape
-extensive lateral dimensions -moderate compositional maturity of sands -MAINLY STORM GENERATED HUMMOCKY X-STRAT |
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SUBMARINE UPPER MID FAN HAS FACIES;
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Thinning upward, graded conglomerate, samdstone, debris flows
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SUBMARINE LOWER MID FAN HAS FACIES;
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Thickening-upward proximal turbidites
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SUBMARINE UPPER FAN HAS FACIES;
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massive conglomerate and breccia, debris flows
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SUBMARINE LOWER FAN HAS FACIES;
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Thickening-upward classic and distal turbidite
Pelagic chert and 1st |
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list 5 sedimentary structures with
line of transport or line of flow |
assymetric ripple=line of transport
symetric=line of transport current lineation=line of flow sole marks=line of transport |
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Aragonite is metastable and recrystallizes to calcite with time.
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TRUE
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Smaller particles always round more rapidly than larger particlaes.
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FALSE
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Mudcracks always indicate a terrestrial paleoenvironment.
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TRUE
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A pelmicrite is a rock composed of pellets with a mud matrix.
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TRUE
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OOLITHS ARE ACTUALLY FECES PRODUCED BY MUD-INGESTING ORGANISMS.
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FALSE
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FLASER BEDDING IS THE SAME THING AS TROUGH CROSS BEDDING
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FALSE
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Clastic rocks are usually bedded, whereas carbonate rocks are usually massive.
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TRUE
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Debris flows are commonly composed of diamicton
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TRUE
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Beach gravels commonly have prolate clasts, whereas river gravel clasts are usually oblate
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FALSE
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A Zingg diagram characterizes gravel clasts in terms of form
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TRUE
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Roundness always increases with increasing transport regardless of the type of conglomerate clast involved
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FALSE
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Most of the feldspar found in sandstones is either K-spar or albite
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FALSE?
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A rock fragment is, by definition. a polycrystalline grain
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TRUE
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Silt and clay make up a streams bedload; sand and gravel are considered suspended load
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FALSE
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FLUTE CASTS ARE A TYPE OF SOLE MARK.
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TRUE
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lithogenous features are
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1. continents
2. volcanic islands 3. continental margins |
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BIOGENOUS features are
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macro/microscopic
silica(SiO2) carbonate(CaCO3) tropics-extreme biological activity deep water-diatoms, foraminefera |
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HYDROGENOUS
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Manganese nodules
Phosphorite (CaPO4) Carbonate(CaCO3) |
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Carbonate is both biogenous and hydrogenous
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TRUE
|
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COSMOGENOUS Features are
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Nickel- iron micrometeorites
Size=0.01-0.64mm |
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WhERE are nearshore NERITIC SEDIMENTS
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Continental shelves
Deep sea fans glacial deposits carbonate platform (bahama island) |
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Deep Sea Oceanic Sediments
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Abyssal clays
Oozes (1.calcareous 2.siliceous) |
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Heavy Minerals inlcude all of the following except:
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Kspar
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All of the following are common cementing agents except:
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BIOTITE
|
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A rock composed of 55% quartz, 34% feldspar, 10% lithics, 0% matrix is a:
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feldspathic arenite
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A rock composed of 97% QUARTZ, 2% LITHICS, and 1% feldspar is a
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QUARTZ ARENITE
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A rock composed of 45% QUARTZ, 30% LITHICS, 5% FELDSPAR, and 20% matrix
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LITHIC WACKE
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A rock composed of 85% clay and 15% silt is a:
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MUDSTONE
|
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WHICH OF THE FOLLOWING DENOTES A CONGLOMERTE CONTAINING CLASTS OF MANY DIFFERENT LITHOLIGIC TYPES?
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POLYmictic
CONGLOMERATE |
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Which of the following particle types is transported by saltation?
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SAND
|
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Which of the following is not formed by liquefaction or dewatering?
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inverse GRADING
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A grain supported rock containing lime mud is a
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packstone
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A mud supported rock containing greater than 10% grains is a
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wackestone
|
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ALgal accretionary grains are also termed:
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oncolites
|
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What are the size limits for gravel, sand, silt, and clay
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>2mm
.06-2 .002-.06mm <.002mm |
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What are three clastic features of caronate rocks that contrast with those of detrital or clastic origin
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non-clastic
lime mud=silt clay mud precipitated from seawater cannot be identified using microscope have to redstain |
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What are three ways carbonate mud can be formed?
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calcareous algae(penicillus)
precipitate from seawater pH of 8.2 from the creatures that eat lime mud and excrete it as feces(pellets) |