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Seafloor spreading. Age of oceanic lithosphere; youngest (light colour) is along spreading centers. Seafloor spreading, or seafloor spread, is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
July 19, 1964 [ 2 ] Etowah Indian Mounds (9BR1) are a 54-acre (220,000 m 2) archaeological site in Bartow County, Georgia, south of Cartersville. Built and occupied in three phases, from 1000–1550 CE, the prehistoric site is located on the north shore of the Etowah River. Etowah Indian Mounds Historic Site is a designated National Historic ...
Marine sediment. v. t. e. The seabed (also known as the seafloor, sea floor, ocean floor, and ocean bottom) is the bottom of the ocean. All floors of the ocean are known as 'seabeds'. The structure of the seabed of the global ocean is governed by plate tectonics. Most of the ocean is very deep, where the seabed is known as the abyssal plain.
1,651,000 km 2 (637,000 sq mi) [ 1 ] Movement 1. West. Speed 1. 25mm/year. Features. Drake Passage, Scotia Sea, and South Georgia. 1 Relative to the African Plate. The Scotia Plate (Spanish: Placa Scotia) is a minor tectonic plate on the edge of the South Atlantic and Southern oceans.
The U.S. state of Georgia is commonly divided into four geologic regions that influence the location of the state's four traditional physiographic regions. [ 1 ][ 2 ] The four geologic regions include the Appalachian foreland, Blue Ridge, Piedmont, and Coastal Plain. These four geologic regions commonly share names with and typically overlap ...
Mid-ocean ridge cross-section (cut-away view) A mid-ocean ridge (MOR) is a seafloor mountain system formed by plate tectonics. It typically has a depth of about 2,600 meters (8,500 ft) and rises about 2,000 meters (6,600 ft) above the deepest portion of an ocean basin. This feature is where seafloor spreading takes place along a divergent plate ...
Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. Oceanic trenches are prominent, long, narrow topographic depressions of the ocean floor. They are typically 50 to 100 kilometers (30 to 60 mi) wide and 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic ...
The Central Graben lies amid the Permian basins and their high. The formation of these has been influenced by the zig zag suture line of the Caledonian orogeny with its areas of crustal tension weakness. Sea floor expansion continues, and sea levels rise. The sea level is 100 meters (330 ft) to 200 meters (660 ft) higher than present day levels ...