Chapter 7 geology
if you were designing a rock that would be easily weathered, which of the following characteristics would it have?
a soluble chemical composition
if a rock is poorly sorted, this mean the rock contains
a wide range in the size of clasts
melting glaciers tends to deposit most of the sediment they carry and create
at their terminus (end)
shallow coastal accumulations of sand that rise above the sea as long narrow islands are called
barrier islands
which of the following environments would most likely consist of sand/or rounded cobbles
beach at a
this sandstone includes shells of marine creatures that live in shallow water. what is the most likely environment in which it formed
beach next to sea
which of the following is most likely to deposit a conglomerate?
braided river
sediments with a large amount of sand are most likely at
braided river at c and and delta at d
a sandstone containing mostly sand but mixed with rounded pebbles and pieces of shells indicates deposition
by waves at the beach
a soft very fine grained limestone formed via the accumulation of the calcium carbonate remains of microorganisms is known as
chalk
which environment is least likely to deposit siltstone or shale
channel of a braided river
Which environment is most likely to deposit a breccia?
debris flow
these sandstone beds are interlayed with dark marine shales. what is the most likely environment in which the sandstone formed?
deep-water turbidity currents
fine grained clastic rocks are
easily eroded
the deep sea floor is characterized by sediment dominated by
fine dust and the remains of single celled organisms
because shales and siltstones are easily eroded, the areas where they are exposed typically:
have soft slopes and soil cover
the largest sand dunes in dry climates can stretch
hundreds of kilometers
which of the following sites would contain the finest grained sedimentary deposits?
lake at e
what type of rock would you form in this coral reef
limestone
which environment is least likely to deposit a breccia
meandering river
which of the following is not involved in turning some sediment into sedimentary rock
metamorphism
lime muds and clastic limestone sands are deposits that form carbonate rocks in
nearshore environments
shale is a common sedimentary rock because
one of the places clay is deposited is very widespread (the seafloor)
sedimentary rocks are comprised of material that comes primarily from
other locations
which of the following processes is not considered physical weathering
oxidation
peat forms from the accumulation of
plant material
which of the following is not a type of carbonate rock
shale
which of the following environments would likely have large clasts
steep slope
what typically happens to the size, shape, and sorting of clasts as they are transported from steep mountains toward more gentle settings
the clasts become more rounded
fluvial refers to
the processes and sediment of streams and rivers
which of the following is a characteristic of fine-grained clastic rocks
the rocks tend to be easily eroded
what happens to the majority of sediment being carried by moving water as it enters a standing body (little or no motion of water)
the sediment gradually settles to the bottom
which of the following characteristics are not used to classify and name clastic sediments
the size of the clasts
sorting describes
the size range of clasts in the sediment
whcih of the following processes is not considered to be chemical weathering
thermal expansion
which of the following is a common characteristic of carbonate rocks
they commonly have a dissolved appearance
which of the following environments would most likely have sediment formed by evaporation of seawater?
tidal flat at E
which of the following statements is not true about clastic sedimentary rocks?
to be called a sandstone, quartz must make up more than 95 percent of the grains
Which environment is a setting that can deposit sand?
turbidity currents along a continental slope
which of the following attributes does not apply to these sediments
well sorted