 <unk> is located 610 kilometres ( 380 mi ) northeast of <unk> 216 kilometres ( 134 mi ) northeast of <unk> , and 200 kilometres ( 120 mi ) southwest of <unk> . <unk> is located near the mouth of the <unk> River , in the coastal region of central <unk> . Geology of the coastal area was formed during the Pleistocene period ; silt , clay , and gravel can be found here . Geological formation from the <unk> period is found in the inland area , which contains limestone , <unk> , and sandstone . The soil is generally soft . 
