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Classic Clastics

Crafted by Trivia Architect pu2-ke-qi-ri

Fun Trivia : Quizzes : Earth Science : Classic Clastics

Introduction:
"Do you understand sand? Mull over boulders? Love mud? Are you a big fan of alluvium? If you are thinking, "My sediments exactly!" or "At long clast!" well, take this quiz!"


1. You can sometimes tell the source rock of a particular sandstone by looking at the mineral composition of the grains.
    True
    False


2. What happens to clastic sedimentary rocks during diagenesis (the process by which freshly deposited sand or mud becomes rock)?
    All of these
    Cementation
    Compaction
    Dissolution


3. Your geology professor falls into a pool of quicksand. What should you advise him to do? (Keep in mind that if you help him out, he will give you a good grade in the class!)
    Be still
    Tread water, uh, quicksand
    Thrash around wildly
    Panic


4. I love loess. The word, that is. What exactly is loess?
    A hill shaped by the wind
    Fine, wind-blown dust
    An intermittent stream channel
    Seasonal light and dark layers


5. Occasionally, on the deep ocean floor, out in the middle of nowhere, one can find clastic sediments, ranging in size from fine sand to boulders and pebbles. Where does this come from, when there is nary a continent in sight?
    Passing ships
    Subduction
    Aliens
    Icebergs


6. Very coarse sediment, stream channel deposits, sheet flow deposits, debris-flow deposits, generally coarsening upwards-- what depositional environment?
    Alluvial fan
    Meandering stream
    Braided stream
    Delta


7. Dune-scale crossbedding interbedded with interdune areas, like deflationary pavements and playas. Ventifacts, mudcracks, raindrop imprints, and crystals of evaporites can sometimes also be found. What depositional environment?
    Alluvial fan
    Desert
    Beach
    Meandering stream


8. Which side of a meandering stream should you buy land on if you want to increase your real estate investment: the point bar side, or the cut bank side?
    Answer: (Either "point bar" or "cut bank.")


9. You want to see whether a particular sandstone came from a tidal flat. What sort of bedforms would you be looking for?
    Large-scale dunes (single current direction)
    Herringbone cross-strata (reversing current directions)
    Deep erosional scour features (single current direction)
    Misplaced beach umbrellas


10. Why should you care about clastics?
    Thar be OIL!
    Soil to grow crops in!
    Sand = beaches!
    All of these


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