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Unformatted text preview: No photosynthesis possible (too deep), so chemosynthesis provides food for the organisms there. Chemosynthesis –mechanism for making food using: CO 2 sulfur compounds energy from the heat Chemosynthetic bacteria basis of the food chain Other organisms Crabs Shrimp Tube worms Ophiolite – section of oceanic crust that has been accreted onto edge of a continent Structure: Sediment (Top) Pillow basalt Sheeted dikes Gabbro Mantle (Bottom) Atoll – Horseshoe- or ring-shaped coral island surrounding a submerged hot spot volcano Seen most often in the Pacific (south Pacific especially, like Bikini Atoll). Some in Indian Ocean as well (Maldives) In center of atoll is a lagoon Beneath lagoon is a submerged volcano Volcano is submerged because of a combination of: Erosion Subsidence after the volcano moves away from the hot spot...
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This note was uploaded on 01/17/2012 for the course GEOL 1054 taught by Professor Dr.bethrinard during the Fall '09 term at Tarleton.
- Fall '09