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50 terms

5 and 6

clay minerals formed from gabbers or diorite bedrock illustrate which kind of weathering
frost wedging is the major weathering process contributing to the formation of which eolith material
talus slopes
what portion of an angular fracture bounded granitic block shows the highest rate of weathering
the edges and corners
which of the following describes a characteristic process in the formation of a peddler soil
iron oxides and aluminum rich clays are precipitated in the B- horizon
which of the following is are most susceptible to chemical weathering by dissolution
why is humus layer typically thick in a cool temperate forest soil than in a tropical rainforest soil
less humus is produced in the cool temperate forest but the rate of decay and oxidation is slower than in a tropical rainforest
clay minerals, silica sio3 and dissolved poratssium bicarbonate in the soil water are products of which process
chemical weathering of orthoclase felspar
what two factors speed up rates of chemical reaction and weathering in rocks and soils
warm temperatures very moist
in terrain with steep hills slopes which crop and cultivation technique will minimize soil erosion
apples land between the trees is planted in grass and not cultivates
in which area are pedal soils most likely to be found
a moderately dry to semiarid grassland such as the western great plains
in the rocky mountain region of the united states north facing slopes are typically more moist and heavily forested than the south facing slopes
north facing slopes receive about the same amount of precipitation as south facing slopes less moisture evaporates from north facing slopes
the finely divided red,brown and yellow soil coloring minerals originate by what process
precipitation of iron oxides during the chemical weathering process
which of the following statements about acidic precipitation is likely to be false?
lowered taxes and relazed fovernmental reguations wil result in more private and public sectors spending to reduce emissions of acid forming gases to the atmosphere
which of the following statements out latrines or tropical rainforest is true
laterite soils readily compact and hardened when dried and exposed to sunlight
which of the following best describes the dust bowl?
areas of severe wind erosion on the great plains
which one of the following is important, mecahnical weathering process for enlarging fractures and extending them deeper into large boulders and bedrock
frost wedging
which of the following best describe sets of fractures in relatively fresh bedrock such as granite that are roughly parallel to the land surface
sheeting fractures
what two chemical constituents cannot form by chemical weathering of the feldspar minerals
insoluble iron oxides and soluble magnesium bicarbonates
under similar warm moist climatic conditions why would basalt and gabber generally have higher chemical weathering rates then rhyolite and granite
the ferromagnesian minerals in the gabber and basalt are subject to oxidation and chemical breakdown
which one of the following statements concerning mechanical weathering is not true
involves a major change in the mineral composition of the weather material
which term describes a soil formed by weathering of the underlying bedrock
which one of the following statements best descries erosion
the process by which weathered rock and mineral particles are removed from one area and transported elsewhere
which term best describes those processes that move weathered rock materials and soils downslope
mass wasting
assume that water filling a crack in a rock undergoes cycles of freezing and melting which of the following statement is true
water expands as it freezes causing the crack walls to be pushed apart
which of the following best scribes the A soil horizon
leaching zone
what mineral particles are the dominant coloring agents in reddish brownish and yellowish soils
dust sized grains of iron oxides
which term best describes an accumulation of angular rock fragments at the base of a steep bedrock slope or cliff?
talus slope
in which areas would weathering by frost wedging probably be most effective?
in moist temperate climates
which one of the following statements concerning soil erosion is not true
sheet erosion rills and gullies develop mainly during prolonged droughts
lateritic soils from under what climatic conditions
warm and moist as in a wet, tropical forest
which of the following statements concurring humus is not true
is readily leached from the B horizon in weakly acidic soil soultions
which of the following statements concurring lateritic soils is generally not true?
they remain highly productive agriculturally without additions of fertilizers
caliche is an excessive accumulation of
calcium carbonate in the B- horizon of a pedal
which of the following best describes the process of elevation
removal of very fine sized silt and clay particles from the A and E soil horizon
from the land surface downward to the unweathered bedrock which of the following is the correct order of the different soil horizons
0 A E B C bedrock
___ a common mineral found in igneous rocks is the most abundant mineral in detrital sedimentary rocks
which major component of detrital sedimentary rocks only rarely occurs as a primary mineral in igneous rocks
zircon and tourmaline are dense highly insoluble chemically stable minor
sandstone lithified from quartz-rih beach sand
all clay sediments
clay and fine silt
compaction is a very important part of the lithificatin process for which of the following sediment
a cherty limestone would contain which major constituents
silica and calcite
which of the following best describes bedding gypsum and halite
evaporates chemical sedimentary rocks
___ sandstone contains abundant feldspar suggesting that the sand was derived by weathering and erosion of a granitic bedrocks
____ cement produces bright bright red and yellow colors in some sandstone
iron oxide
what is probably the single most important, original depositional feature in sedimentary rocks
bedding and startification
which of the following would retain the most detailed impression of fossilized organism
very fine grained volcanic ash deposited in an ancient lake
what is bittern
residual brine left after precipitation of halite