Coastlines facing very energetic wind and wave systems will tend to hold only large rocks as smaller particles will be held in suspension in the turbid water column and carried to calmer areas by longshore currents and tides. Coastlines that are protected from waves and winds will tend to allow finer sediments such as clay and mud to precipitate creating mud flats and mangrove forests. The shape of a beach depends on whether the waves are constructive or destructive, and whether the material is sand or shingle. Waves are constructive if the period between their wave crests is long enough for the breaking water to recede and the sediment to settle before the succeeding wave arrives and breaks.
Ocean beaches are habitats with organisms adapted to salt spray, tidal overwash, and shifting sands. Some of these organisms are found only on beaches. Examples of these beach organisms in the southeast US include plants like sea oats, sea rocket, beach elder, beach morning glory (Ipomoea pes-caprae), and beach peanut, and animals such as mole crabs (Hippoidea), coquina clams (Donax), ghost crabs, and white beach tiger beetles.
The next big boost for the airlines would come in the 1970s, when the Boeing 747, McDonnell Douglas DC-10, and Lockheed L-1011 inaugurated widebody ("jumbo jet") service, which is still the standard in international travel. The Tupolev Tu-144 and its Western counterpart, Concorde, made supersonic travel a reality. Concorde first flew in 1969 and operated through 2003. In 1972, Airbus began producing Europe's most commercially successful line of airliners to date. The added efficiencies for these aircraft were often not in speed, but in passenger capacity, payload, and range. Airbus also features modern electronic cockpits that were common across their aircraft to enable pilots to fly multiple models with minimal cross-training.
Fabric ramps are commonly employed by the military for temporary purposes where the underlying sediment is stable and hard enough to support the weight of the traffic. A sheet of porous fabric is laid over the sand to stabilize the surface and prevent vehicles from bogging. Fabric Ramps usually cease to be useful after one tidal cycle as they are easily washed away, or buried in sediment.
Based on a novel by Iris Rainer Dart, Beaches traces the 30-year oil-and-water friendship between free-spirited Bronx Jew CC Bloom (Bette Midler) and uptight San Francisco WASP Hillary Essex (Barbara Hershey). The two meet as children in Atlantic City (played by Mayim Bialik and Marcie Leeds) and are reunited in the 1960s, when CC is a struggling singer and Hillary is trying to break free from her staid upbringing by becoming an activist. The two ladies room together, then fall out when both are attracted to off-Broadway producer John Pierce (John Heard). CC wins John, but she quickly outgrows him as she matriculates into a bawdy performer. The recently patched-up friendship between CC and Hillary is torn asunder again when Hillary and her new husband express distaste for CC's performing style. Comes the 1970s, and CC and Hillary are reunited after shedding their respective spouses. Broke again, they once more become Manhattan roommates. Their bond strengthens, but there is tragedy in store for the duo.