Modern and ancient hiatuses in the pelagic caps of Pacific guyots and seamounts and internal tides
نویسندگان
چکیده
Incidences of non-deposition or erosion at the modern seabed and hiatuses within the pelagic caps of guyots and seamounts are evaluated along with paleo-temperature and physiographic information to speculate on the character of Late Cenozoic internal tidal
منابع مشابه
The paradox of Pacific guyots and a possible solution for the thick 'reefal' limestone on Eniwetok Island
Guyots are flat-topped seamounts. Thousands of guyots, often in chains and clusters, are strewn across the Western Pacific Ocean, especially between the Hawaiian Islands and Japan. The guyots in the Mid-Pacific Mountains are particularly numerous. The tops of the guyots are generally about 1,500 meters below sea level. Guyots present a number of persistent problems within the uniformitarian par...
متن کاملUse of Chemical Warfare Agents in Ancient History. A Case of Persians and Romans in Dura-Europos, Modern Syria in 256 C.E.
Background: Chemical warfare agents (CWA) were most notably used during the First World War in Europe, against Iranians and Kurdish citizens of Iraq at the hands of Saddam Hossein’s regime in 1980s and more recently in Syria. The use of CWA is banned under the international law. Methods: Ancient uses of CWA are not well studied. Recently, their use during the Persian siege of the Roman-held Dur...
متن کاملThe West Mariana Ridge, western Pacifi c Ocean: Geomorphology and processes from new multibeam data
The western fl ank of the West Mariana Ridge and the distal Parece Vela Basin have been mapped for the fi rst time using a modern multibeam echosounder. The new data reveal the Ridge to be composed of 82 volcanic peaks, of which 25 have summits with water depths of <1000 m and 11 have summits with depths of <500 m deep. Five of the vol canoes have summit craters, and two are guyots ; the remain...
متن کاملTuna Longline Fishing around West and Central Pacific Seamounts
BACKGROUND Seamounts have been identified as aggregating locations for pelagic biodiversity including tuna; however the topography and prevailing oceanography differ between seamounts and not all are important for tuna. Although a relatively common feature in oceanic ecosystems, little information is available that identifies those that are biologically important. Improved knowledge offers oppo...
متن کاملSeamounts are hotspots of pelagic biodiversity in the open ocean.
The identification of biodiversity hotspots and their management for conservation have been hypothesized as effective ways to protect many species. There has been a significant effort to identify and map these areas at a global scale, but the coarse resolution of most datasets masks the small-scale patterns associated with coastal habitats or seamounts. Here we used tuna longline observer data ...
متن کامل