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Americano Creek
Americano Creek is a long westward-flowing stream in the California counties of Sonoma and Marin. It flows into the Estero Americano, a long estuary, and thence to the Pacific Ocean. This article covers both watercourses. Course Americano Creek springs from low-lying coastal hills west of Cotati and runs westward, paralleling Roblar Road. It passes a closed landfill and crosses the Valley Ford Road. At this point the channel becomes better defined and also deep enough for kayaking during the winter months. Kayakers access the creek here by means of an unpaved boat launch road that is reachable from Marsh Road. The lower reach of the creek flows westward past the small community of Bloomfield, California, Bloomfield, paralleling Valley Ford Road, and passes under State Route 1, known locally as "Highway 1" or "the Shoreline Highway", at which point it begins to define the Sonoma-Marin county line. Just west of the highway, the watercourse's official name changes to ''E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferdinand Von Wrangel
Baron Ferdinand Friedrich Georg Ludwig von Wrangel (, Romanization of Russian, tr. ; – ) was a Russia Germans, Russia German (Baltic Germans, Baltic German) explorer and officer in the Imperial Russian Navy, Honorable Member of the Saint Petersburg Academy of Sciences, and a founder of the Russian Geographic Society. He is best known as the chief manager of the Russian-American Company and governor of the Russian settlements in present-day Alaska. In English texts, ''Wrangel'' is sometimes spelled ''Vrangel'', a Romanization of Russian, transliteration from Russian, which more closely represents its pronunciation in German language, German, or ''Wrangell''. Biography Wrangel was born in Pskov, into the Baltic German nobility of the Wrangel family and was a distant nephew of Generalfeldmarschall Friedrich Graf von Wrangel, Friedrich von Wrangel. He graduated from the Sea Cadet Corps (Russia), Naval Cadets College in 1815. He participated in Vasily Golovnin's world cruise o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
California State Route 1
State Route 1 (SR 1) is a major north–south state highway A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either Route number, numbered or maintained by a sub-national state or province. A road numbered ... that runs along most of the Pacific coastline of the U.S. state of California. At , it is the longest state route in California, and the List of longest state highways in the United States, second-longest in the US after Montana Highway 200. SR 1 has several portions designated as either Pacific Coast Highway (PCH), Cabrillo Highway, Shoreline Highway, or Coast Highway. Its southern terminus is at Interstate 5 in California, Interstate 5 (I-5) near Dana Point, California, Dana Point in Orange County, California, Orange County and its northern terminus is at U.S. Route 101 in California, U.S. Route 101 (US 101) near Leggett, California, Leggett in Men ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quarry
A quarry is a type of open-pit mining, open-pit mine in which dimension stone, rock (geology), rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some jurisdictions to manage their safety risks and reduce their environmental impact. The word ''quarry'' can also include the underground quarrying for stone, such as Bath stone. History For thousands of years, only hand tools had been used in quarries. In the eighteenth century, the use of drilling and blasting operations was mastered. Types of rock Types of rock extracted from quarries include: *Chalk *China clay *Scoria, Cinder *Clay *Coal *Construction aggregate (sand and gravel) *Coquina *Diabase *Gabbro *Granite *Gritstone *Gypsum *Limestone *Marble *Ores *Phosphate rock *Quartz *Sandstone *Slate *Travertine Methods of quarrying The method of removal of stones from their natural bed by using different operations is called quarryin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pitkin Marsh Lily
''Lilium pardalinum'' subsp. ''pitkinense'', the Pitkin Marsh lily, is an endangered perennial herb of the family Liliaceae that is endemic to certain wetland areas in the northern California Coast Ranges of Sonoma County, California, United States.U.S. Fish and Wildlife Service plant profile for the Pitkin Marsh lily It is a of '' Lilium pardalinum''. Distribution ''Lilium pardalinum'' subsp. ''pitkinense'' is found in the narrow elevation range of above mean sea level. The Pitkin Marsh ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trifolium Amoenum
''Trifolium amoenum'', known by the common names showy Indian clover and two-fork clover, is endemic to California, and is an endangered annual herb that subsists in grassland areas of the San Francisco Bay Area and the northern California Coast Ranges. Description This wildflower has an erect growth habit and is typically found on heavy soils at elevations less than 100 meters. The flower head is somewhat spherical with a diameter of about 2.5 centimeters. The petals are purple gradating to white tips. History and conservation Edward Lee Greene collected the first recorded specimen of this plant in 1890 in Vacaville, California (in Solano County). The historical range of ''Trifolium amoenum'' was from the western extreme of the Sacramento Valley in Solano County west and north to Marin and Sonoma Counties, where many sites were presumed extirpated by urban and agricultural development. From further expansion of the human population, ''Trifolium amoenum'' had become a rar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limnanthes Vinculans
''Limnanthes vinculans'', the Sebastopol meadowfoam, is an endangered species of meadowfoam found only in the Laguna de Santa Rosa in Sonoma County, California, United States and an area slightly to the south in the Americano Creek and Washoe Creek watersheds. The name ''vinculans'' derives from the Latin root vinculum, meaning "a bond, a cord." The specific epithet ''vinculans'' means linking or bonding, in reference to the sharing of some characters of ''L. vinculans'' with ''L. douglasii'' (R.Br) and ''L. bakeri'' (J.T. Howell). Description Like the other meadowfoams, ''Limnanthes vinculans'' is a small annual herb, with multiple stems growing up to in height; white flowers occur singly at the ends of stems. This plant bears white flowers singly at the termini of its stems. ''L. vinculans'' is unique in its genus for having compound leaves with three to five leaflets; each leaflet is entire, with a narrow-obovate shape. The flowers are small (12 to 18 millimeters across) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endangered Species
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, invasive species, and climate change. The International Union for Conservation of Nature (IUCN) Red List lists the global conservation status of many species, and various other agencies assess the status of species within particular areas. Many nations have laws that protect conservation-reliant species which, for example, forbid hunting, restrict land development, or create protected areas. Some endangered species are the target of extensive conservation efforts such as captive breeding and habitat restoration. Human activity is a significant cause in causing some species to become endangered. Conservation status The conservation status of a species indicates the likelihood that it will become extinct. Multiple factors are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rare Species
A rare species is a group of organisms that are very uncommon, scarce, or infrequently encountered. This designation may be applied to either a plant or animal taxon, and is distinct from the term ''endangered species, endangered'' or ''threatened species, threatened.'' Designation of a rare species may be made by an official body, such as a national government, state, or province. The term more commonly appears without reference to specific criteria. The International Union for Conservation of Nature does not normally make such designations, but may use the term in scientific discussion. Rarity rests on a specific species being represented by a small number of organisms worldwide, usually fewer than 10,000. However, a species having a very narrow Endemic (ecology), endemic range or Habitat fragmentation, fragmented habitat also influences the concept. Almost 75% of known species can be classified as "rare". Rare species are species with small populations. Many will move into the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Headwaters
The headwater of a river or stream is the geographical point of its beginning, specifically where surface runoff water begins to accumulate into a flowing channel of water. A river or stream into which one or many tributary rivers or streams flows has many headwaters, these being all of the individual headwaters of its tributaries. Each headwater is one of the river or stream's sources, as it is the place where surface runoffs from rainwater, meltwater, or spring water begin accumulating into a more substantial and consistent flow that becomes a first-order tributary of that river or stream. The tributary with the longest channel of all the tributaries to a river or stream, such length measured from that tributary's headwater to its mouth where it discharges into the river or stream, is the main stem of the river or stream in question. Definition The United States Geological Survey (USGS) states that a river's "length may be considered to be the distance from the mouth to th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc
Zinc is a chemical element; it has symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting, and final extraction using electricity ( electrowinning). Zinc is an essential trace element for humans, animals, plants and for microorganisms and is necessary for prenatal and postnatal development. It is the second most abundant trace metal in humans after iron, an import ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ammonia
Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the chemical formula, formula . A Binary compounds of hydrogen, stable binary hydride and the simplest pnictogen hydride, ammonia is a colourless gas with a distinctive pungent smell. It is widely used in fertilizers, refrigerants, explosives, cleaning agents, and is a precursor for numeous chemicals. Biologically, it is a common nitrogenous waste, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to fertilisers. Around 70% of ammonia produced industrially is used to make fertilisers in various forms and composition, such as urea and diammonium phosphate. Ammonia in pure form is also applied directly into the soil. Ammonia, either directly or indirectly, is also a building block for the synthesis of many chemicals. In many countries, it is classified as an List of extremely hazardous substances, extremely hazardous substance. Ammonia is toxic, cau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper
Copper is a chemical element; it has symbol Cu (from Latin ) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable, unalloyed metallic form. This means that copper is a native metal. This led to very early human use in several regions, from . Thousands of years later, it was the first metal to be smelted from sulfide ores, ; the first metal to be cast into a shape in a mold, ; and the first metal to be purposely alloyed with another metal, tin, to create bronze, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
