The origin and history of sandstone can often be deduced by examining the sorting, roundness, and mineral composition of its constituent grains.
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Which of the following description can appropriatly interpret the deposition environment of conglomerate?
A. deposited very close to the source rock, not far-traveled sediment at all
B. steep slopes or very turbulent currents, like energetic mountain streams or strong wave activity or glaciers
C. submarine deposits made by dense sediment-choked turbidity currents
D. particles washed by waves at the shoreline/beach or wind-blown in a desert
Which of the following description can appropriatly interpret the deposition environment of quartz sandstone?
A. steep slopes or very turbulent currents, like energetic mountain streams or strong wave activity or glaciers
B. deposited very close to the source rock, not far-traveled sediment at all
C. particles washed by waves at the shoreline/beach or wind-blown in a desert
D. submarine deposits made by dense sediment-choked turbidity currents
E. relatively quiet, nonturbulent water current
Which description is appropriately match the characteristics of coquina and chalk?
A. composed of small spherical grains, commonly small shell fragments, coated with precipitated calcium carbonate
B. chemical changes or high water temperatures increase calcium carbonate concentrations to the point of precipitation
C. biochemical limestone where shell fragments are poorly cemented together
D. relatively simple invertebrate animals secrete a calcareous skeleton and grow together
Which description is appropriately match the characteristics of coral reef?
A. chemical changes or high water temperatures increase calcium carbonate concentrations to the point of precipitation
B. relatively simple invertebrate animals secrete a calcareous skeleton and grow together
C. biochemical limestone where shell fragments are poorly cemented together
D. composed of small spherical grains, commonly small shell fragments, coated with precipitated calcium carbonate
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