Diatomite at Lompoc, California. Johns-Manville Corporation (1964) mines some of the large diatomite deposits laid down in Santa Barbara County in the middle to upper Miocene (5-25 million y.a). Many of the current coastal regions, including those now occupied by Los Angeles and San Francisco, were then under the sea. The Lompoc area was probably an archipelago or series of shallow bays and bet...

seasonal variations of the seawater properties (e.g. temperature, salinity, density and chlorophyll-a) in western part of the southern coastal waters of the caspian sea near the iranian coast were studied. a portable ctd probe was applied for profiling from sea surface to bottom at 23 stations. maximum depth of the profiling stations was more than 470 m in the study area. vertical structure of ...

The main aim of this study was to understand the faunistic composition, ecological properties, and zoogeographical composition of the family Elateridae (Coleoptera) of the Western Black Sea region of Turkey. As a result, 44 species belonging to 5 subfamilies and 19 genera were identified. After adding species reported in the literature to the analysis, the fauna in the research area consists of...

makrān or mukrān was a vast region in the south eastern plateau of iran, whose border extended from kerman on the west to sind on the east. this extended area was limited to sistan on the north and makrān sea (sea of oman) on the south. makrān, mākā, mīkā, mukrān, gidruziyā, zhidruziyā, etc. are the names applied to this region in different historical periods. the expanse of this region’s borde...

All current data on underwater hearing in pinnipeds are based on tests conducted in small tanks, and may not accurately represent the auditory functioning of free-ranging animals, especially if hearing sensitivity changes with water depth. Underwater auditory thresholds were determined for a California sea lion at depths ranging from 10 to 100 meters. The following results were obtained: (1) Fa...

The Middle East has always been of interest to other countries for its geopolitical position and its vast supply of oil and gas. Meanwhile, the issue of the transfer of oil by sea is of great importance. The Strait of Hormuz is perhaps one of the most important blue-water in the world due to the geographical location of the Persian Gulf to the Free Seas. The world's superpowers, like the United...

in the past 25 years, rising of the caspian sea level, part of a natural treat to the sea, has inundated and destroyed many buildings and arable lands and threatened many inhabitations in coastal areas. the main reason for these damages is that the law-setback has lost its efficiency and human activities have proceeded seaward. the goal of this study is to introduce a proper setback line for th...

The fossil record of Red Sea fringing reefs provides an opportunity to study the history of coral-reef survival and recovery in the context of extreme environmental change. The Middle Pleistocene, the Late Pleistocene, and modern reefs represent three periods of reef growth separated by glacial low stands during which conditions became difficult for symbiotic reef fauna. Coral diversity and pal...