Beach Marine Sediments

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Fine, sandy beaches often occur in areas with light wave action (California's Ocean Resources, 1995). While a more coarse sand is found with heavy wave action (California's Ocean Resources,

* The sand dunes on the beaches. This area is affected by wind erosion as well as the tides if adequate vegetative cover is not present. The main type of erosion, from the sea, takes the sand from the sand dunes as well as the rest of the beach in a rip. The sand is then pulled out to sea where it forms a sand bar. On calmer days, the sand is brought back to the beach.

Sand dunes are a valid indication of the quality of the soil and the surrounding ocean. When vegetation is established in sand dunes, it stabilises it- i.e. gives the dunes structure. This structure helps prevent erosion by using the plant life to trap the sand. Without these plants (and ultimately the sand dunes) sand will be subject to many natural forces without protection, meaning any major storm could theoretically remove large amounts of sand from the beach with no natural means of replenishing it. Long Reef Beach is commendable in the amount of vegetation it has produced.

How effective are the coastal management strategies used at present in your local beach area?

The erosion of shorelines is a natural process that can have beneficial or adverse impacts on the creation and maintenance of habitats. Sands and gravels eroded from the shores of coastal bays maintain the beach as a natural barrier between the open water and coastal wetlands. Beaches move back and forth onshore, offshore and along shore with changing wave conditions. The finer-grained silts and clays derived from the erosion of shorelines are sorted and carried as far as the waters of wetlands or tidal flats, where benefits are derived from addition of the new material. However, excessively high sediment loads can smother submerged aquatic vegetation beds, cover shellfish beds and tidal flats, fill in riffle

Long Island is famous for its sandy ocean beaches. Between the barrier beach and the main coast is the Great South Bay. The beaches and dunes have very different characteristics. The sandy beach is the junction of land and ocean. The sandy beach consists of two zones, the swash zone and the drift line. The swash zone is the area of wet sand, caused by the incoming wave. The drift line is formed by the dead seaweed and other aquatic plants. Behind the sandy beach is the primary dune. The primary dune's main function is to absorb the force of the ocean and protect the great south bay and the island's main coast. In some cases secondary dunes form. These dunes are behind the primary dune and are therefor protected from the ocean. This provides the stability necessary for plant growth. Many time a maritime forests will form on secondary dunes.

There are 2 types of beaches. One is erosion dominant and the other is deposition

It was surely a proud day when your child went off to college. One can only imagine the concern and disappointment you felt when you discovered they were dealing with an addiction. Many people will immediately point to and place the blame on the party environment typically found on college campuses. The reality is your child may be dealing with some deep-rooted personal problems that often leads to excessive drinking and using. At this point, you might be coming to the realization that alcohol rehab in Florida is something you need to start considering.

Remove the sandals to feel the sand between the toes. Each beach on Oahu has a different texture of sand; from a soft powder, to gritty sand, tiny rocks, smoothed glass mixture and small chipped shells. Laniakea beach, also known as “Turtle

The intertidal rocky shore of Caloundra Beach is inhabited by diverse range of biodiversity of animals and plants, many of which have developed high levels of adaptations throughout their existence. The very boundary of marine and terrestrial ecosystem, this environment is subjected to extremes of the physical environment such as temperature, desiccation, wave turbulence as well the ecological interactions that commonly occur in biotic communities (e.g. competition, predation). However Rocky intertidal shores are easily accessible by humans and provide an enjoyable opportunity for passive recreation and for science and environmental education as well.

Seafloor sediments come from a variety of sources, including small living organisms from the overlying sea water, broken material from area transported to the sea by streams or wind, fiery remains of volcanoes, and chemical precipitates that comes directly from seawater. A space amount of it starts as dust from space. In other words, the particles found in silt on the ocean bottom change significantly in synthesis and record an intricate interchange of procedures that have acted to shape, transport, and protect them in Earth's piece.

After World War 2, the U.S. Office of Naval Research intensified efforts in ocean-floor mapping, leading to the discovery of the Mid-Atlantic Ridge to be part of a continous system of mid-oceanic ridges on all ocean floors, prompting Harry H. Hess to suggest the theory of sea-floor spreading. The oldest fossils found in ocean sediments were only 180 million years old and little sediment were accumulated on the ocean floor. Thus, he suggested that seafloors were no more than a few hundred million years old, significantly younger than continental land due to

1. One of the paramount topics we have covered in this course is oceanography (no surprises there). Rather than thinking of oceanography as “just” the study of the ocean, I have always viewed oceanography as the study of marine biology, marine chemistry, marine geology and marine physics. Before diving into any sort of detail, one can see (from the above) that oceanography incorporates four fundamental sciences into one topic; therefore, when asked to list three ways in which marine geology and marine chemistry interrelate, the possibilities are endless. Because we are to list just three examples, I am going to focus my answer on the Earth’s composition/layers. The first way these two fields interrelate is though convection currents (mantle). Density and temperature are two topics central to chemistry. Because density and temperature, along with depth, play a critical role in plate movement (geology), the plate tectonic theory is one example. The second way is through radioactive decay. Specifically, we use radioactive dating (e.g., isotope dating and half-lives) to determine the exact age of a specific geological structures. The third way these two fields interrelate is in determining the composition of the Earth’s inner core. I saved this example for last because it shows how marine physics can also be interrelated in marine chemistry and marine geology. We [scientific community] have a sound understanding of the Earth’s composition because of mass, density and temperature

It is this soft sand and clay which is easily eroded by the action of waves, as the ocean slowly claims back the region it used to occupy. There are