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Tuzoia Diagram
''Tuzoia'' (from Mount Tuzo, a mountain in the Canadian Rockies) is an extinct genus of large bivalved arthropod known from Early to Middle Cambrian marine environments from what is now North America, Australia, China, Europe and Siberia. The large, domed carapace reached lengths of , making them amongst the largest known Cambrian arthropods. Description The largest carapaces of ''Tuzoia'' are known to reach in length, suggesting a total body length of approximately . Along the sides of the carapace a spiked ridge is present, and the edges and midline of the carapace are also spiked in many species. These spines likely functioned to aid stability while swimming. The carapaces are marked with a reticulate (net-like) pattern, which was likely to increase the structural integrity of the valves while remaining lightweight. The head had a anterior/ocular sclerite at the top, a single pair of large stalked eyes, and a pair of segmented antennae. The head has pairs of cephalic app ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Doolittle Walcott
Charles Doolittle Walcott (March 31, 1850February 9, 1927) was an American paleontologist, administrator of the Smithsonian Institution from 1907 to 1927, and director of the United States Geological Survey.Wonderful Life (book) by Stephen Jay Gould published in 1989, Chapter 4 He is famous for his discovery in 1909 of well-preserved fossils, including some of the oldest soft-part imprints, in the Burgess Shale of British Columbia, Canada. Early life Charles Doolittle Walcott was born on March 31, 1850 in New York Mills, New York. His grandfather, Benjamin S. Walcott, moved from Rhode Island in 1822. His father, also Charles Doolittle Walcott, died when Charles Jr. was only two. Walcott was the youngest of four children. He was interested in nature from an early age, collecting minerals and bird eggs and, eventually, fossils. He attended various schools in the Utica area but left at the age of eighteen without completing high school, the end of his formal education. His intere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plesiomorphies
In phylogenetics, a plesiomorphy ("near form") and symplesiomorphy are synonyms for an ancestral character shared by all members of a clade, which does not distinguish the clade from other clades. Plesiomorphy, symplesiomorphy, apomorphy, and synapomorphy, all mean a trait shared between species because they share an ancestral species. Apomorphic and synapomorphic characteristics convey much information about evolutionary clades and can be used to define taxa. However, plesiomorphic and symplesiomorphic characteristics cannot. The term ''symplesiomorphy'' was introduced in 1950 by German entomologist Willi Hennig. Examples A backbone is a plesiomorphic trait shared by birds and mammals, and does not help in placing an animal in one or the other of these two clades. Birds and mammals share this trait because both clades are descended from the same far distant ancestor. Other clades, e.g. snakes, lizards, turtles, fish, frogs, all have backbones and none are either birds nor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balang Formation
The Balang formation, is a Cambrian Period geological formation, which outcrops in western Hunan and eastern Guizhou in southern China. It contains Burgess Shale-type soft-bodied fossils. It is intermediate in age between the Chengjiang and Kaili lagerstatten. It contains a low diversity of trilobite Trilobites (; meaning "three lobes") are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest-known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the ...s. References Geologic formations of China Cambrian System of Asia Cambrian China Cambrian northern paleotemperate deposits Paleontology in China Geography of Hunan {{paleo-site-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emu Bay Shale
The Emu Bay Shale is a geological formation in Emu Bay, South Australia, containing a major Konservat-Lagerstätte (fossil beds with soft tissue preservation). It is one of two in the world containing Redlichiidan trilobites. The Emu Bay Shale is dated as Cambrian Series 2, Stage 4, correlated with the upper Botomian Stage of the Lower Cambrian. Its mode of preservation is the same as the Burgess shale, but the larger grain size of the Emu Bay rock means that the quality of preservation is lower. More than 50 species of trilobites, non-biomineralized arthropods, palaeoscolecids, a lobopodian, a polychaete, vetulicolians, nectocaridids, hyoliths, brachiopods, sponges, chancelloriids, and a chelicerate are known from the Emu Bay Shale. Description The Emu Bay Shale of Kangaroo Island, South Australia, is Australia's only known Burgess-Shale-type Konservat-Lagerstätte, and includes faunal elements such as ''Anomalocaris'', ''Tuzoia'', ''Isoxys'', and '' Wronascolex'', in commo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kinzers Formation
The Kinzers Formation is a geologic formation in Pennsylvania. It preserves fossils dating back to the Cambrian Period. The base of the Kinzers Formation is primarily a dark-brown shale. The middle is a gray and white spotted limestone and, locally, marble having irregular partings. The top is a sandy limestone which weathers to a fine-grained, friable, porous, sandy mass. Type section Named from exposures at a railroad cut at Kinzers, Lancaster County, Pennsylvania.Stose, G.W., and Jonas, A.I., 1922. ''The lower Paleozoic section in southeastern Pennsylvania'', Washington Academy of Sciences, Journal v. 12, no. 5, p. 358-36/ref> Other outcrops The Kinzers overlies the Vintage Dolomite at the type section of the Vintage at a railroad cut at Vintage, Pennsylvania. High quality fossil specimens (''Lagerstätte'') were obtained from the Noah Getz Quarry, one mile north of Rohrerstown, Pennsylvania, but the quarry location is overgrown and disturbed by development. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pioche Shale
The Pioche Shale is an Early to Middle Cambrian Burgess shale-type Lagerstätte in Nevada. It spans the Early–Middle Cambrian boundary; fossils from the Early Cambrian are preserved in botryoidal hematite, whereas those from the Middle Cambrian are preserved in the more familiar carbon films, and very reminiscent of the Chengjiang County preservation. It preserves arthropods and worms familiar from the Burgess Shale. It spans the early Cambrian ''Olenellus'' and basal Middle Cambrian ''Eokochaspis nodosa'' trilobite zones. The eastern version of this shale can be found eastwards in Grand Canyon, as the Bright Angel Shale.Geology graphic of Pioche Shale & Bright Angel Shale at 3dpards.wr.usgs.go/ref> References External linksGraphic of geology of area west-to-eastfor Lake Mead National Recreation Area Lake Mead National Recreation Area is a U.S. national recreation area in southeastern Nevada and northwestern Arizona. Operated by the National Park Service, Lake Mead ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parker Shale
Parker may refer to: Persons * Parker (given name) * Parker (surname) Places Place names in the United States *Parker, Arizona *Parker, Colorado * Parker, Florida * Parker, Idaho *Parker, Kansas * Parker, Missouri * Parker, North Carolina *Parker, Pennsylvania *Parker, South Carolina * Parker, South Dakota *Parker, Texas in Collin County * Parker, Johnson County, Texas * Parker, Washington * Parker City, Indiana *Parker County, Texas *Parker Dam, at Lake Havasu on the Colorado River between Arizona and California * Parker Road (DART station), a light rail terminal on Parker Road in Plano, Texas * Parker School, Montana * Parker Strip, Arizona *Parker Township, Marshall County, Minnesota *Parker Township, Morrison County, Minnesota *Parker Township, Butler County, Pennsylvania *Parker Center, a former police building in Los Angeles Elsewhere * C. W. Parker Carousel, a Burnaby Village Museum exhibit in British Columbia, Canada * Mount Parker (Philippines), a Mindanao island volcano ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eager Formation
{{disambiguation ...
Eager may refer to: *Eager (band) * Eager (horse), (1788 – after 1795), a British Thoroughbred racehorse * ''Eager'' (novel), a children's science-fiction novel written by Helen Fox * Eager (surname) *, an Admirable-class minesweeper built for the United States Navy during World War II See also * * Eagers * Eager beaver (other) * Eagre, another term for a tidal bore *Eger (other) Eger may refer to: Places *Eger, a city in Hungary **Eger (Tisza), tributary of the river Tisza **Eger wine region **Roman Catholic Archdiocese of Eger * Eger (Balaton), river flowing to Lake Balaton, Hungary *''Eger'', German name of Cheb, Czech ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guizhou
Guizhou (; formerly Kweichow) is a landlocked province in the southwest region of the People's Republic of China. Its capital and largest city is Guiyang, in the center of the province. Guizhou borders the autonomous region of Guangxi to the south, Yunnan to the west, Sichuan to the northwest, the municipality of Chongqing to the north, and Hunan to the east. The population of Guizhou stands at 38.5 million, ranking 18th among the provinces in China. The Dian Kingdom, which inhabited the present-day area of Guizhou, was annexed by the Han dynasty in 106 BC. Guizhou was formally made a province in 1413 during the Ming dynasty. After the overthrow of the Qing in 1911 and following the Chinese Civil War, the Chinese Communist Party took refuge in Guizhou during the Long March between 1934 and 1935. After the establishment of the People's Republic of China, Mao Zedong promoted the relocation of heavy industry into inland provinces such as Guizhou, to better protect them fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
