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Trilobite Wilderness
The Trilobite Wilderness is a wilderness area in the Marble Mountains of the eastern Mojave Desert in northeastern San Bernardino County, California. It is named for the large number of trilobite fossils that can be found within its boundaries. Aside from its paleontological significance, it is home to typical flora and fauna of the Mojave Desert, including a stable population of bighorn sheep and desert tortoise. The area was created as an addition to the National Wilderness Preservation System in 1994 as a part of the California Desert Protection Act. The site is managed by the Bureau of Land Management. It is one of six wilderness areas in Mojave Trails National Monument, established in 2016. Geology In the early Cambrian, fossiliferous sediments from a shallow sea were deposited upon a basement of Proterozoic granite and later uplifted to form the Marble Mountains. These sediments – the Latham Shale Formation – are between and thick. Deeper sediments were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mojave Trails National Monument
Mojave Trails National Monument is a large U.S. National Monument located in the state of California between Interstate 15, Interstates 15 and Interstate 40, 40. The park was created to preserve a wide variety of geological and cultural features including several titular trails - the Old Spanish Trail (trade route), Old Spanish Trail, the United States home front during World War II, World War II-era Desert Training Center and U.S. Route 66, Route 66. It partially surrounds the Mojave National Preserve. It was designated by President Barack Obama on February 12, 2016, along with Castle Mountains National Monument and Sand to Snow National Monument, also in southern California. It is under the administration of the Bureau of Land Management. Features Mojave Trails National Monument is the largest national monument in the contiguous United States and is almost entirely undeveloped. Like the adjacent Mojave National Preserve, Mojave Trails National Monument contains numerous desert m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latham Shale
The Latham Shale is a geologic formation in California. It contains some of the most important examples of Lower Cambrian trilobites in the world. Fossils of 12 different species of trilobite and 9 other Cambrian invertebrates, including articulate brachiopods and Anomalocaris appendages, have been found in the formation. Fossil veins are so thick that in certain places nearly every rock contains trilobite fossils, making it a destination for trilobite collectors worldwide. Oncolite fossils are also found in significant quantities. Due to the fragmentary nature of most trilobites found in the formation, it may represent a trilobite molting ground or just an area where ocean currents brought dead trilobite exoskeletons. Latham shale is the primary rock formation in the southern Marble Mountains of the Mojave Desert where it is found in deposits thick. See also * List of fossiliferous stratigraphic units in California * Paleontology in California Paleontology in California ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protected Areas Of San Bernardino County, California
Protection is any measure taken to guard something against damage caused by outside forces. Protection can be provided to physical objects, including organisms, to systems, and to intangible things like civil and political rights. Although the mechanisms for providing protection vary widely, the basic meaning of the term remains the same. This is illustrated by an explanation found in a manual on electrical wiring: Some kind of protection is a characteristic of all life, as living things have evolved at least some protective mechanisms to counter damaging environmental phenomena, such as ultraviolet light. Biological membranes such as bark on trees and skin on animals offer protection from various threats, with skin playing a key role in protecting organisms against pathogens and excessive water loss. Additional structures like scales and hair offer further protection from the elements and from predators, with some animals having features such as spines or camouflage servi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bureau Of Land Management Areas In California
Bureau ( ) may refer to: Agencies and organizations *Government agency *Public administration * News bureau, an office for gathering or distributing news, generally for a given geographical location * Bureau (European Parliament), the administrative organ of the Parliament of the European Union * Federal Bureau of Investigation, the leading internal law enforcement agency in the United States * Service bureau, a company which provides business services for a fee * Citizens Advice Bureau, a network of independent UK charities that give free, confidential help to people for money, legal, consumer and other problems * Credit bureau, an organization that gathers and shares information about individuals’ and businesses’ credit histories Furniture * Bureau is a piece of furniture with hinged writing space of flap resting at an angle when closed ** Bureau bedstead is form of a folding bed that looks like a bureau when closed ** Bureau cabinet is a combination of a bureau and d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IUCN Category Ib
The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status of the natural world and the measures needed to safeguard it. It is involved in data gathering and analysis, research, field projects, advocacy, and education. IUCN's mission is to "influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable". Over the past decades, IUCN has widened its focus beyond conservation ecology and now incorporates issues related to sustainable development in its projects. IUCN does not itself aim to mobilize the public in support of nature conservation. It tries to influence the actions of governments, business and other stakeholders by providing information and advice and through building partnersh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kick The Bucket
To kick the bucket is an English idiom considered a euphemistic, informal, or slang term meaning "to die". Its origin remains unclear, though there have been several theories. Origin theories A common theory is that the idiom refers to hanging, either as a method of execution or suicide. However, the actual origin of the idiom is a matter of dispute. Its earliest appearance is in the ''Dictionary of the Vulgar Tongue'' (1785), where it is defined as "to die". In John Badcock's slang dictionary of 1823, the explanation is given that "One Bolsover having hung himself from a beam while standing on a pail, or bucket, kicked this vessel away in order to pry into futurity and it was all UP with him from that moment: ''Finis''". The theory favoured by the OED relates to the alternative definition of a bucket as a beam or yoke that can be used to hang or carry things on."Bucket". ''The Oxford English Dictionary''. 2nd ed. 1989. The "bucket" may refer to the beam on which slaughtered pigs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oncolite
Oncolites are sedimentary structures composed of oncoids, which are layered structures formed by the growth of one or more species of microorganisms, usually containing cyanobacteria. Oncolites are very similar to stromatolites, but, instead of forming columns, they form approximately spherical structures. The oncoids often form around a central nucleus, such as a shell fragment, and a calcium carbonate structure is deposited by encrusting microbes. Oncolites are indicators of warm waters in the photic zone, but are also known in contemporary freshwater environments. These structures rarely exceed 10 cm in diameter. Oncolites may have either a porostromate or spongiostromate texture. Most oncolites are spongiostromate, having no recognisable cellular texture or microstructure. Porostromate oncolites are mostly unknown during the Precambrian; since the Eocene they have mostly been confined to freshwater environments. Distribution The appearance of recent or near-recent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anomalocaris
''Anomalocaris'' (from Ancient Greek , meaning "unlike", and , meaning "shrimp", with the intended meaning "unlike other shrimp") is an extinct genus of radiodont, an order of early-diverging stem-group marine arthropods. It is best known from the type species ''A. canadensis,'' found in the Stephen Formation (particularly the Burgess Shale) of British Columbia, Canada. The other named species ''A. daleyae'' is known from the somewhat older Emu Bay Shale of Australia. Other unnamed ''Anomalocaris'' species are known from China and the United States. Like other radiodonts, ''Anomalocaris'' had swimming flaps running along its body, large compound eyes, and a single pair of segmented, frontal appendages, which in ''Anomalocaris'' were used to grasp prey. Estimated to reach long excluding the frontal appendages and tail fan, ''Anomalocaris'' is one of the largest animals of the Cambrian, and thought to be one of the earliest examples of an apex predator, though others have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Articulate Brachiopods
Rhynchonelliformea is a major subphylum and clade of brachiopods. It is roughly equivalent to the former class Articulata, which was used previously in brachiopod taxonomy up until the 1990s. These so-called articulated brachiopods have many anatomical differences relative to "inarticulate" brachiopods of the subphyla Linguliformea and Craniformea. Articulates have hard calcium carbonate shells with tongue-and-groove hinge articulations (hence the name) and separate sets of simple opening and closing muscles. The Rhynchonelliformea (as described in the Treatise Part H, revised 1997–2007) is divided into five classes: Obolellata, Kutorginata, Chileata, Strophomenata, and Rhynchonellata. The Rhynchonellata are found living today, as the major constituent of modern brachiopod faunas. The other classes are all extinct: the Obolellata and Kutorginata are restricted to the Cambrian, while the Chileata and Strophomenata range through most of the Paleozoic. Anatomy Like all brachio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moulting
In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is a process by which an animal casts off parts of its body to serve some beneficial purpose, either at specific times of the year, or at specific points in its life cycle. In medieval times, it was also known as "mewing" (from the French verb "muer", to moult), a term that lives on in the name of Britain's Royal Mews where the King's hawks used to be kept during moulting time before becoming horse stables after Tudor times. Moulting can involve shedding the Epidermis (skin), epidermis (skin), pelage (hair, feathers, fur, wool), or other external layer. In some groups, other body parts may be shed, for example, the entire exoskeleton in arthropods, including the wings in some insects. Examples In birds In birds, moulting is the periodic replacement of feathers by shedding old feathers while producing new ones. Feathers are dead struct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olenellina
Olenellina is a suborder of the order Redlichiida of trilobites that occurs about halfway during the Lower Cambrian, at the start of the stage called the Atdabanian. Olenellina are arguably the earliest trilobites in the fossil record as members of Redlichiina, although Ptychopariida and Eodiscina follow soon after. The suborder died out when the Lower Cambrian passed into the Middle Cambrian, at the end of the stage called Toyonian. A feature uniting the Olenellina is the lack of rupture lines (or Trilobite#Dorsal sutures, sutures) in the headshield, which in other trilobites assist the periodic moulting (or ecdysis), associated with arthropod growth. Some derived trilobites have lost facial sutures again (some Eodiscina, all Agnostina, and a few Phacopina), but all of these are blind, while all Olenellina have eyes. Taxonomy The suborder contains four superfamilies: Olenelloidea (with 3 families and 5 stemgroup genera), Judomioidea (with 1 family and 3 stemgroup genera), Nevad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mountain Press
Mountain Press Publishing Company is an American book publishing company based in Missoula, Montana. It specializes in western U.S. history, natural history, and non-technical earth science, geology, and ecology. The company began in 1948 when David P. Flaccus started an offset printing Offset printing is a common printing technique in which the inked image is transferred (or "offset") from a plate to a rubber blanket and then to the printing surface. When used in combination with the lithography, lithographic process, which ... business in Missoula. Over several years the company evolved into an independent publishing company and eventually a distributor for other publishers. The company's largest and most popular series of books is ''Roadside Geology'' with 29 titles and sales of over 1 million total copies. Other popular series include ''Geology Underfoot'' (7 titles) and ''Roadside History'' (18 titles). In October 2024, The Geological Society of America (GSA) acq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
