water sedimentation
21Natural history of Australia — The natural history of Australia has been shaped by the geological evolution of the Australian continent from Gondwana and the changes in global climate over geological time. The building of the Australian continent and its association with other …
22Penstemon haydenii — Taxobox name = Penstemon haydenii [cite web url=http://www.ars grin.gov/cgi bin/npgs/html/taxon.pl?27263 title=Penstemon haydenii information from NPGS/GRIN publisher=www.ars grin.gov accessdate=2008 07 25 last= first=] regnum = Plantae divisio …
23Hydrology — Water covers 70% of the Earth s surface. Hydrology is the study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability. A… …
24environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
25Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …
26Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
27Asia — /ay zheuh, ay sheuh/, n. a continent bounded by Europe and the Arctic, Pacific, and Indian oceans. 2,896,700,000; ab. 16,000,000 sq. mi. (41,440,000 sq. km). * * * I Largest continent on Earth. It is bounded by the Arctic Ocean, the Pacific Ocean …
28Origin of the Oak Ridges Moraine — For general context, see Oak Ridges Moraine. The Oak Ridges Moraine is a geological landform that runs east west across south central Ontario, Canada. It developed about 12,000 years ago, during the Wisconsin glaciation in North America. A… …
29Chilika Lake — Chilka Lake Fishermen pushing against the tide Coordinates …
30Polystrate fossil — [ Nova Scotia, Canada (printed 1868).] Polystrate or upright fossil describes fossils of single organisms (such as tree trunks) that run through more than one geological strata. Entire fossil forests have been discovered [… …
