Abstract:
Study was carried out around the lagoon and coastal area of Setiu Wetlands in order
to determine the general characteristics and grain-size distribution. Sediment samples
were collected from 39 stations of lagoon area and 8 stations of coastal area. The
mean size ranged between 0.06 to 2.52 0 and 2.12 to 2.69 0 for both the lagoon and
coastal sea-bottom sediments respectively. Generally, the sediments in the study area
consist mostly of coarse to fine particles. The major portions of the sediment are
negatively skewed. This indicates that the study area is under the influence of rather
strong wave and current action. This study which also combined with the geophysical
survey was conducted near the coastal zone of the study area. High resolution seismic
sub-bottom profiling technique is the standard method employed to map geological
features and locate structures below the surface of the seafloor. Data obtained from
seismic records were used to interpret the seismic reflectors. The seismic
interpretation considered three main reflectors (layers) and distributed with uniform
pattern in all stations. The first layer is the seabed consists of fine sand, while the
second layer consists mainly of medium sand. The third layer can be defined as the
seabed multiple. This survey provided geological information with high horizontal
and vertical resolution of the study area. By using this system hopefully, could be an
effective way to image the marine subsurface structures and can be used in the higher
degrees of sedimentary research and marine resource exploration
