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Humboldt Lagoons State Park
Humboldt Lagoons State Park is a California State Park on the Redwood Coast, in Humboldt County, California. It is located along U.S. Route 101 between Trinidad and Orick. The park protects three lagoons with estuaries and wetlands. Geography Big Lagoon is the largest and southernmost lagoon. Stone Lagoon is in the middle, and Freshwater Lagoon is the northernmost and smallest. The lagoons are shallow bays between rocky headlands where coastal wave action has formed a sandy bar separating each lagoon from the ocean. The park was established in 1931. The lagoons are resting areas for migratory waterfowl using the Pacific Flyway between Lake Earl on the Smith River estuarine wetlands to the north and Humboldt Bay on the Mad River estuarine wetlands to the south. Studies around Humboldt Bay indicate tectonic activity along the Cascadia subduction zone has caused local sea level changes at intervals of several centuries. The alluvial plain forming each shallow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stone Lagoon
Stone Lagoon (Yurok language: ''Chah-pekw O'Ket-toh'') is the second of three similar lagoons within Humboldt Lagoons State Park, along the coast of Humboldt County, California. It is located between Trinidad to the south and Orick at the mouth of Redwood Creek to the north. The lagoons are shallow bays between rocky headlands where coastal wave action has formed a sandy bar separating each lagoon from the Pacific Ocean. The lagoons are resting areas for migratory waterfowl using the Pacific Flyway between Lake Earl on the Smith River estuarine wetlands to the north and Humboldt Bay on the Mad River estuarine wetlands to the south. Geology Stone Lagoon is similar to other coastal features of northern California including Humboldt Bay to the south and Lake Earl to the north. An alluvial plain is surrounded by steep uplands. Hills adjacent to Stone Lagoon have been identified as undivided pre- Cretaceous metasedimentary rock. Studies around Humboldt Bay indicate tecton ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Earl (California)
Lake Earl is a lagoon on the extreme northern California coast, just south of the Oregon border. A navigable body of water, it lies partly within Tolowa Dunes State Park and partly within Lake Earl Wildlife Area in Del Norte County, California and the third-most important seabird area on the West Coast after the Farallon Islands, Farallons and the Channel Islands of California, Channel Islands.McHugh, PaulLake Earl is pearl of northernmost coast 19 July 2007, San Francisco Chronicle, accessdate 3 January 2013 Lake Earl has two principal lobes separated by "the Narrows." The smaller lobe, which is also closer to the ocean and the sand bar breach site, is called Lake Tolowa or Lake Talawa by the California Department of Fish and Game. The larger lobe of the lagoon is Lake Earl. Lake Earl is mostly freshwater while Lake Tolowa has a higher salt content. As opposed to an estuary, which is typically open to the ocean and fresh water constantly, a lagoon seals up seasonally and fil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Little River (Humboldt County)
The Little River is the river in the U.S. state of California, whose drainage basin is the largest on the Pacific coast between the Mad River and Big Lagoon. The river drains the forested Franciscan assemblage of the California Coast Ranges. The lowermost mile of channel is through Quaternary alluvium and dune sand of an estuarine floodplain typical of coastal inlets along the Cascadia subduction zone. Land seaward of U.S. Route 101 forms Little River State Beach and Clam Beach County Park. Little River State Park was established in 1931. The floodplain upstream of the Highway 101 bridge is cleared as grazing pasture, and the upland portion of the drainage basin, including the former company town of Crannell, is in private ownership growing forest products. In 2014, the North Coast regional water board recommended that the Little River be listed as an impaired waterway due to '' E. coli'' contamination 600 times greater than normal. References See also *List of rive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Redwood Creek (Humboldt County)
Redwood Creek ( Yurok: '' 'O'rekw 'We-Roy '' ) is a river in Humboldt County, California. The river's headwaters are in the Coast Range at about and it flows roughly northwest until it empties into the Pacific Ocean near the small town of Orick, the only development in the -watershed. Course Redwood Creek begins near Board Camp Mountain in the Coast Ranges near Dinsmores. The stream's headwaters lie at about above sea level, in a network of small unnamed streams along the north sides of a ridge abutting the Mad River valley to the south. It flows north through a deep forested valley, receiving many small tributaries including Minor and Lacks creeks from the right. About downstream of the source, the creek crosses under State Route 299. Slightly less than from the mouth, the river passes the southern boundary of Redwood National Park. It then receives Bridge Creek from the left, before winding through several groves of Sequoia sempervirens, more commonly known as redwood ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalvia
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances. The shell of a bivalve is composed o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt Marsh
A salt marsh or saltmarsh, also known as a coastal salt marsh or a tidal marsh, is a coastal ecosystem in the upper coastal intertidal zone between land and open saltwater or brackish water that is regularly flooded by the tides. It is dominated by dense stands of salt-tolerant plants such as herbs, grasses, or low shrubs. These plants are terrestrial in origin and are essential to the stability of the salt marsh in trapping and binding sediments. Salt marshes play a large role in the aquatic food web and the delivery of nutrients to coastal waters. They also support terrestrial animals and provide coastal protection. Salt marshes have historically been endangered by poorly implemented coastal management practices, with land reclaimed for human uses or polluted by upstream agriculture or other industrial coastal uses. Additionally, sea level rise caused by climate change is endangering other marshes, through erosion and submersion of otherwise tidal marshes. However, r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sitka Spruce
''Picea sitchensis'', the Sitka spruce, is a large, coniferous, evergreen tree growing to almost tall, with a trunk diameter at breast height that can exceed 5 m (16 ft). It is by far the largest species of spruce and the fifth-largest conifer in the world (behind giant sequoia, coast redwood, kauri, and western red cedar), and the third-tallest conifer species (after coast redwood and coast Douglas fir). The Sitka spruce is one of the few species documented to exceed in height. Its name is derived from the community of Sitka in southeast Alaska, where it is prevalent. Its range hugs the western coast of Canada and the US, continuing south into northernmost California. Description The bark is thin and scaly, flaking off in small, circular plates across. The inner bark is reddish-brown. The crown is broad conic in young trees, becoming cylindric in older trees; old trees may not have branches lower than . The shoots are very pale buff-brown, almost white, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alluvial Plain
An alluvial plain is a largely flat landform created by the deposition of sediment over a long period of time by one or more rivers coming from highland regions, from which alluvial soil forms. A floodplain is part of the process, being the smaller area over which the rivers flood at a particular period of time, whereas the alluvial plain is the larger area representing the region over which the floodplains have shifted over geological time. As the highlands erode due to weathering and water flow, the sediment from the hills is transported to the lower plain. Various creeks will carry the water further to a river, lake, bay, or ocean. As the sediments are deposited during flood conditions in the floodplain of a creek, the elevation of the floodplain will be raised. As this reduces the channel floodwater capacity, the creek will, over time, seek new, lower paths, forming a meander (a curving sinuous path). The leftover higher locations, typically natural levees at the margins o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cascadia Subduction Zone
The Cascadia subduction zone is a convergent plate boundary that stretches from northern Vancouver Island in Canada to Northern California in the United States. It is a very long, sloping subduction zone where the Explorer, Juan de Fuca, and Gorda plates move to the east and slide below the much larger mostly continental North American Plate. The zone varies in width and lies offshore beginning near Cape Mendocino, Northern California, passing through Oregon and Washington, and terminating at about Vancouver Island in British Columbia. The Explorer, Juan de Fuca, and Gorda plates are some of the remnants of the vast ancient Farallon Plate which is now mostly subducted under the North American Plate. The North American Plate itself is moving slowly in a generally southwest direction, sliding over the smaller plates as well as the huge oceanic Pacific Plate (which is moving in a northwest direction) in other locations such as the San Andreas Fault in central and southern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tectonic
Tectonics (; ) are the processes that control the structure and properties of the Earth's crust and its evolution through time. These include the processes of mountain building, the growth and behavior of the strong, old cores of continents known as cratons, and the ways in which the relatively rigid plates that constitute the Earth's outer shell interact with each other. Tectonics also provide a framework for understanding the earthquake and volcanic belts that directly affect much of the global population. Tectonic studies are important as guides for economic geologists searching for fossil fuels and ore deposits of metallic and nonmetallic resources. An understanding of tectonic principles is essential to geomorphologists to explain erosion patterns and other Earth surface features. Main types of tectonic regime Extensional tectonics Extensional tectonics is associated with the stretching and thinning of the crust or the lithosphere. This type of tectonics is fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mad River (California)
The Mad River ( Wiyot: ''Baduwa't'') is a river in upper Northern California. It flows for in a roughly northwest direction through Trinity County and then Humboldt County, draining a watershed into the Pacific Ocean north of the town of Arcata near alifornia Redwood Coast-Humboldt County Airportin McKinleyville. The river's headwaters are in the Coast Range near South Kelsey Ridge. History Before Euro-American settlers arrived in the mid-1800s, the native peoples occupying the lower Mad River watershed were the Wiyot (from approximately Blue Lake to its mouth, plus the greater Humboldt Bay region) who spoke a dialect affiliated with the Algonquian language family, with upriver reaches controlled by three different groups whose languages are related to the Athabascan family, the Whilkut, Nongatl and Lassik (Baumhoff 1958). Today, among these distinct groups, only the Wiyot-affiliated Blue Lake Rancheria and the Wiyot Tribe of the Table Bluff Reservation are federally re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
