Презентация по профессиональному иностранному языку для геологов

• 1 слайд

  SEDIMENTARY STRUCTURES
  compiled by A.A. Bleim-Stegailo
  

• 2 слайд

  Plan:
  Flow structures (потоковые структуры)
  Bedforms
  Ripple marks(складчатость)
  Antidunes
  Biological structures
  Soft sediment deformation structures
  Bedding plane (плоский, ровный) structures
  Within bedding structures
  Secondary sedimentary structures
  
  compiled by A.A. Bleim-Stegailo
  

• 3 слайд

  Sedimentary structures are the features found within or on the surface of sedimentary bed that formed during or following deposition.
  compiled by A.A. Bleim-Stegailo
  

• 4 слайд

  compiled by A.A. Bleim-Stegailo
  

• 5 слайд

  compiled by A.A. Bleim-Stegailo
  

• 6 слайд

  Sedimentary structures  are utilized to indicate original position (начальная позиция) of strata and understand the depositional environment  (условия осадконакопления) of the sediment.
  
  compiled by A.A. Bleim-Stegailo
  

• 7 слайд

  Flow structures
  
  There are 2 kinds:
  bidirectional and one directional.
  Flow regimes (режим течения), which at varying speeds and velocities(скорость) produce different structures, are called bedforms.
  (крепление)
  compiled by A.A. Bleim-Stegailo
  

• 8 слайд

  In the lower flow regime, a flat bed, ripples, dunes are formed.
  The upper flow regime forms dunes which become flattened out (выравнивает-ся), to become antidunes.
  compiled by A.A. Bleim-Stegailo
  

• 9 слайд

  Ripple marks
  Ripple marks are usually formed by flowing water. There are two types:
  Symmetrical ripple marks - are created by a two way current, f.ex. the waves on a beach (swash and backwash).
  Asymmetrical ripple marks -
  are created by one way current, f.ex.
  in a river, or the wind in a desert.
  
  compiled by A.A. Bleim-Stegailo
  

• 10 слайд

  Antidunes
  Antidunes are the sediment bedforms created by fast, shallow flows of water.
  compiled by A.A. Bleim-Stegailo
  

• 11 слайд

  Biological structures
  Biologically-created sedimentary structures are called trace fossils. Examples include burrows (норы, поры) and various expressions of bioturbation.
  compiled by A.A. Bleim-Stegailo
  

• 12 слайд

  Soft sediment deformation structures
  SSD is an afterward of loading (приложение нагрузки) on wet sediments, it continues after deposition.
  
  
  
  
  
  compiled by A.A. Bleim-Stegailo
  

• 13 слайд

  Bedding plane structures
  have been deposited and haven’t been reshaped or reworked.
  compiled by A.A. Bleim-Stegailo
  

• 14 слайд

  Within bedding structures
  These structures are within sedimentary bedding. They are formed when the sediments are deposited.
  Hummocky cross-stratification (бугристые-косые)
  Cross bedding (косая слоистость)
  Imbrication (нахлестывание)
  graded bedding (сортированная слоистость)
  Bioturbation
  
  compiled by A.A. Bleim-Stegailo
  

• 15 слайд

  Secondary sedimentary structure
  
  Secondary sedimentary structures are formed after primary deposition has been occured or during the diagenesis of a sedimentary rock.
  compiled by A.A. Bleim-Stegailo
  

• 16 слайд

  (бассейны осадконакопления,
  впоследствии заполнены)
  (Перекрытие)
  compiled by A.A. Bleim-Stegailo
  

• 17 слайд

  Guess the meaning.
  are little waves on the surface of water caused by the wind or by something moving in or on the water.
  is a hill of sand near the sea or in a desert.
  is a tunnel or hole in the ground that is dug by an animal such as a rabbit.
  a mechanical load or force to something.
  the disturbance of sedimentary deposits by living organisms
  move along or out steadily and continuously in a current or stream
  compiled by A.A. Bleim-Stegailo
  

• 18 слайд

  Answers
  Ripples
  A dune
  A burrow
  Loading
  Bioturbation
  flow
  
  compiled by A.A. Bleim-Stegailo
  

• 19 слайд

  THE END
  compiled by A.A. Bleim-Stegailo
  

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