What are the two main types of sedimentary deposits formed near or beneath modern glaciers? How would you distinguish these two deposits types in an area that was glaciated in the past?
What will be an ideal response?
Till is the sediment deposited directly by glaciers, whereas outwash is the sediment carried away from the glaciers by meltwater streams. Till consists of a very poorly sorted, unbedded mixture of rock debris in which most of the larger cobbles and boulder are angular, scratched, and may exhibit planar, faceted surfaces. Outwash is better sorted than till, and contains bedding and cross bedding typical of river-deposited sediment. Cobbles and boulders in outwash are rounded.
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Many species are going extinct at a rate that is alarming scientists.
Answer the following statement true (T) or false (F)
Figure 29.3 shows four examples of species equilibrium numbers. In this hypothetical example, which combination of factors produces the highest number of species? The lowest number of species? In this example, is island size or distance from the mainland more important in producing a higher species equilibrium number?
In what ways can geographic position be considered a control of temperature?
What will be an ideal response?
The oblasts with greater than fifty percent non-Russian ethnic groups are in the:
A) west B) southeast C) northeast D) Siberian region