Сборник упражнений по грамматике английского языка. Стрелкова М.С. - 28 стр.

to have progressed considerably in the main valley but not very far in the sub-
sidiary valley.
      41) Value limits presented above are intended to apply only in the case of
the studied area.
      42) Periglacial conditions seem to result in drainage network with a very
high density even though the earlier evolution of relief took place under differ-
ent conditions and the structure of the bedrock doesn’t flavor the occurrence of
high density values.
      43) The proving that the evolution model is correct is based only on those
relief characteristics which are assumed to originate from the evolution which
the model seeks to explain.
      44) Crustal thickening and metamorphism are thought to have resulted
from the collision of the various continental blocks, which followed oceanic clo-
sure by subduction.
      45) On a broader scale, these events have been suggested to may be linked
to a major phase of crustal extension have led to rifting apart of Baltica from
Laurentia at this time.
      46) The presence of normal faults in the Lewisian basement, which were
active at the time of sedimentation, suggests the deposition of the Stoer Group to
have been linked to major lifting during crustal stretching.
      47) The supercontinent that was assembled in the Palaeoprorerozoic by the
amalgamation of Archaean terranes is thought to have existed until c. 1400–
1300 Ma.
      48) The basement gneisses and mafic inclusions, thought to have been
dykes or sills, contain relicts of high-pressure eclogite-facies mineral.
      49) Although the base in unexposed, the Sleat Group is thought to lie un-
comformably on the Lewisian basement.
      50) The petrology of the clasts within the Torridon Group suggests them to
have been derived from the erosion of Lewisian gneisses and supracrustal rocks.
      51) This chemical signatures indicates these rocks are the residues left be-
hind the after partial melting and melt extraction accompanying granulite-facies
metamorphism.
      52) Recent studies have established the Lewisian Complex to comprise
a series of crustal blocks (terranes) that evolved separately before they were
welded together by collision during the Palaeoproterozoic.
      53) The chemical compositions of the gneisses indicate them to be related


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