Primary coasts are shaped by landair forces' Lecture A

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• Primary coasts are shaped by land-air forces.
  (Lecture A)
• Secondary coasts are shaped by water forces.
  (Lecture B)

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Lecture B

• SECONDARY COASTS

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Headlands and Pocket Beaches

• Some coasts are made of uniform material (rock or
  sand), but these are made of varying material and
  erode at different rates of speed.

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Sea stacks, sea caves, and sea arches

• Are the remains of ancient coastlines

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Sand Bar

• Eroded material carried seaward and moved by
  longshore currents

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Shoal

• Bars that are exposed at low tide

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Barrier islands

• Formed by littoral (from shore) drift sediment
• They shape the coastlines
• Examples Outer Banks of North Carolina
  Padre Island Chain in Texas Gulf
  Shores, Alabama
• Barrier Islands protect shores by absorbing the
  force of storm waves from the sea
• Formed from sediment parallel to shore or former
  sand dunes now flooded

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Capes

• Any point out into the water
• made of various materials (rock, sand, gravel)

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http//media-cdn.tripadvisor.com/media/photo-s/01/
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• Spit/Hook
• Sand deposit at the end of a
  longshore current
• Bay mouth bar
• Sand spit closes off a bay
• Tombolo
• Bridge of sediment between island and mainland

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• Blackbeard took such a toll of shipping and
  created so much terror along the American coast
  that Virginia and Carolina planters organized
  against him. The Virginia governor sent the ship
  H.M.S. Pearl out to take him alive or dead. He
  was caught on Nov 21, 1718, near Ocracoke Inlet,
  off the North Carolina coast. He fought
  desperately with sword and pistol until he fell
  with 25 wounds in his body. His head was taken
  back to Virginia and displayed on a pole.

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