persian gulf is a tectonic intra-continental sediment basin in which 40% of global oil and gastrade carries out and is a rich oil and gas resource. persian gulf area is about 236000km2 that is one of thelargest marine habitats including corals, sponges, crabs, fishes, clams, scaphpoodas, cephalopodas, foraminiferas, echinodermatas, ostracodas and bryozoas. some of them live in seabed sediments ...

Marine stromatolites are generated through the interactions of environmental parameters and specific microbial processes. The activities of endolithic bacteria, that bore canals through calcium carbonate (CaCO(3)) sand grains (ooids) and reprecipitate the CaCO(3) as a single layer (i.e. micritic laminae) are especially important in the longer term stability of the stromatolite macrostructure. I...

persian gulf is a tectonic intra-continental sediment basin in which 40% of global oil and gastrade carries out and is a rich oil and gas resource. persian gulf area is about 236000km2 that is one of thelargest marine habitats including corals, sponges, crabs, fishes, clams, scaphpoodas, cephalopodas, foraminiferas, echinodermatas, ostracodas and bryozoas. some of them live in seabed sediments ...

Laboratory bidirectional reflectance and polarization measurements were carried out on packed layers of both natural sediments and manufactured spherical particles. The results indicate that among the natural sediments showing a strong backscattering peak ("hotspot"), the rough platelets are the only sediments with a negative polarization effect. Measurements of circular and linear polarization...

The Late Cambrian Steptoean Positive Carbon Isotope Excursion marks a time of significant change in ocean chemistry and trilobite faunas. On the lead up to carbon isotope excursion at itself, there is global evidence from Laurentia Gondwana cementation by primary aragonite shallow subtidal environments accompanied deposition aragonitic ooids. However, this occurred widely considered have been c...

The Great Amazon Reef System is a living biogenic mesophotic reef ecosystem that has been recently described along the shelf break of Brazil. An oceanographic cruise was carried out in 2019 outer edge French Guiana Shelf. A side-scan sonar survey conducted to locate outcrops and allowed twelve situ 80- 120-m depth dives sampling rocks peripheral sands. majority hard are composed biological conc...