Concept #2 Quiz

Choose the best possible answer to the adhering to concerns around Key Concept 2 "Detrital sedimentary rocks." breccia
1.

You are watching: Detrital grains of which mineral(s) are extremely rare in detrital sediments? why?

What minerals are a lot of widespread in detrital sedimentary rocks and why? Choose all that apply. calpoint out – it is the a lot of plentiful product of precipitation from heat sea water
clay – it is the most abundant product of chemical weathering of feldspar
halite – it is a widespread product of evaporation of lake water
quartz – it is incredibly durable and resistant to chemical weathering
2.Match the complying with detrital sediment types via the primary mode of lithification into sedimentary rock:Using the pulldvery own boxes, match each item on the left to the equivalent item at best.
A. compactivity and also water expulsion
B. cementation and also compaction
Choice AChoice B
mud (mudstone)
Choice AChoice Bsand (sandstone)
3.What is the main basis for distinguishing among miscellaneous detrital sedimentary rocks? Why?
rock size – a valuable monitoring indicating the amount of mechanical weathering
mineral composition – an indicator of the source of the sediment
pwrite-up dimension – a advantageous observation indicating the environment of deposition
pwrite-up form – a helpful monitoring indicating the amount of mechanical weathering
4.Detrital grains of some mineral(s) are incredibly rare in detrital sediments. Which minerals and why?
feldspars – they occur just in granite
quartz – it is very tough and also insoluble in water
calcite – it is soft and also fairly soluble in water
clays – they are rare in soils and regolith layers
5.Match the detrital rock via the appropriate description:Using the pulldown boxes, enhance each item on the left to the equivalent item at ideal.
A. well-sorted, medium-dimension (up to 2 mm) pwrite-ups, huge pore spaces, accounts for around 20% of sedimentary rocks
B. silt- and clay-size pshort articles, tiny pore spaces, accounts for > 50% of sedimentary rocks
C. quartz, feldspar and rock fragments dominate, poorly sorted, angular grains
D. angular huge pwrite-ups that are poorly sorted, few pore spaces
E. gravel- and also sometimes boulder-sized particles that are poorly sorted and also rounded, few pore spaces
Choice AChoice BChoice CChoice DChoice E
breccia
Choice AChoice BChoice CChoice DChoice Econglomerate
Choice AChoice BChoice CChoice DChoice Egraywacke
Choice AChoice BChoice CChoice DChoice Equartz sandstone
Choice AChoice BChoice CChoice DChoice Eshale
6.If shale is such a prevalent rock in the sedimentary rock world, why isn"t it as prominently exposed at the surface as sandstone?
Shale crumbles conveniently, causing enhanced mechanical weathering, whereas sandrock resists weathering even more effectively.
Shale resists weathering more effectively, whereas sandrock crumbles quickly, resulting in boosted mechanical weathering.
Shale has easily broken, highly reenergetic minerals, whereas sandrock has harder-to-break minerals.
Shale dissolves in water, whereas sandrock dissolves only if sufficient carbonic acid is present in the water.
7.Select the answer that lists the common detrital sedimentary rocks in order of boosting pwrite-up dimension.
sandstone, conglomerate, shale
conglomerate, sandrock, shale
shale, conglomerate, sandstone
sandrock, shale, conglomerate
shale, sandstone, conglomerate
8.

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Label the layer with the proper rock type based upon exactly how the layer has actually weathered and mass-wasted:For each item below, usage the pull-down menu to select the letter that labels the correct part of the image.
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