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Chuaria

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Journal Article
Journal: Geology
Published: 01 January 2017
Geology (2017) 45 (1): 75-78.
... documented. To address this knowledge gap, we investigated Chuaria and associated carbonaceous compression fossils from the Tonian Liulaobei Formation in North China. These fossils have been variously interpreted as unicellular or multicellular organisms. Our analysis using backscattered-electron scanning...
Journal Article
Published: 01 May 1990
Journal of Paleontology (1990) 64 (3): 488.
Series: GSA Microform Publication
Published: 01 January 1990
DOI: 10.1130/micro20-p168
EISBN: 9780813759203
... Abstract This is the first supplement to the Annotated Bibliography of the World Literature on the Grand Canyon Type Fossil Chuaria circularis Walcott, 1899. The reader is referred to extensive introductory material that appeared in Vol. 3 of the Grand Canyon bibliography (Spamer, 1988, Geol...
Series: GSA Microform Publication
Published: 01 January 1983
DOI: 10.1130/micro17-p94
EISBN: 9780813759173
... Abstract This annotated bibliography is a guide to the literature on Chuaria Walcott, 1899, currently understood to be a nmnospecific genus represented by C. circularis Walcott, to which a number of other taxa have been referred in taxonomic synonymy. Because of the taxonomic complications...
Journal Article
Published: 01 November 1973
Journal of Paleontology (1973) 47 (6): 1108-1112.
Series: SEPM Special Publication
Published: 01 January 2007
DOI: 10.2110/pec.07.86.0167
EISBN: 9781565762947
Series: GSA Microform Publication
Published: 01 January 1983
DOI: 10.1130/micro17-p4
EISBN: 9780813759173
... part, “An annotated Bibliography of the World Literature on the Grand canyon Type Fossil Chuaria circularis Walcott, 1899, an Index Fossil for the Late Proterozoic” This bibliography was prepared as a separate publication. However, it is apparent from reading the very recent literature (see...
Journal Article
Journal: Geology
Published: 01 July 2011
Geology (2011) 39 (7): 643-646.
... focused on the microchemistry of Cambrian BST fossils, but comparative data from organic-walled microfossils were not available. To address these issues, we analyzed two organic-walled taxa from the Yangtze Gorges area of the South China block, Chuaria (an acritarch) and Vendotaenia (a ribbon-shaped...
FIGURES
Series: SEPM Special Publication
Published: 01 January 2007
DOI: 10.2110/pec.07.86.0151
EISBN: 9781565762947
Series: GSA Microform Publication
Published: 01 January 1983
DOI: 10.1130/micro17-p50
EISBN: 9780813759173
...-indexed to all three volumes. The opportunity is taken herein to also update entries for Chuaria circularis Walcott and for Melanocyrillium Bloeser, spp. The updated entry for C. circularis complements Part III of this volume, the annotated bibliography of the world literature on Chuaria. To maintain...
Journal Article
Journal: GSA Bulletin
Published: 01 August 1982
GSA Bulletin (1982) 93 (8): 681-699.
...DONALD P. ELSTON; EDWIN H. McKEE Abstract A structural disturbance that ended deposition of Chuaria -bearing marine shale of middle Proterozoic age in northern Arizona is recorded by strata within the Sixtymile Formation at the top of the Grand Canyon Supergroup. The disturbance involved marine...
Journal Article
Published: 08 August 2018
Canadian Journal of Earth Sciences (2018) 55 (11): 1284-1296.
...Seyed Hamid Vaziri; Marc Laflamme The Kushk Series is a distinctive late Ediacaran succession occurring in the Bafq and Behabad regions of central Iran that has yielded an extensive community of diverse Ediacara biota, including several Precambrian ( Chuaria ) and Ediacaran ( Cloudina, Corumbella...
FIGURES | View All (10)
Series: Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/SP286.35
EISBN: 9781862395343
.... The Soltanieh Formation consists of shallow marine sediments. Vertical microfacies variation reflects two regressive sequences, the earliest Cambrian System being a regressive cycle. The presence of Chuaria and Vendotaenia in the Soltanieh Formation allows correlation of Iranian sequences to those elsewhere...
Series: DNAG, Geology of North America
Published: 01 January 1991
DOI: 10.1130/DNAG-GNA-G2.97
EISBN: 9780813754543
... Abstract The ages of formations and larger groupings of Precambrian stratified rocks in the Cordillera are, in general, poorly constrained. Only two useful macrofossil assemblages are known: an Ediacaran, non-skeletal fauna found only in the youngest formations, and an older, Chuaria-Tawuia...
Journal Article
Published: 01 March 1981
Canadian Journal of Earth Sciences (1981) 18 (3): 443-447.
...H. J. Hofmann; Chen Jinbiao Abstract The upper part of the stratotype section of the Changcheng System in the Yanshan Range 100 km east of Beijing (Peking) has yielded small megascopic carbonaceous compressions assignable to Tyrasotaenia Gnilovskaya and Chuaria Walcott. These fossils are between...
Journal Article
Published: 01 January 1979
Canadian Journal of Earth Sciences (1979) 16 (1): 150-166.
... the filaments Archaeotrichion , Taeniatum and Siphonophycus , and the sphaeromorph acritarchs Kildinella , Trachysphaeridium , Nucellosphaeridium , and Chuaria circularis . The megafossils, ail of probable algal affinities, comprise large carbonaceous ribbons assigned to the new vendotaenid species Tawuia...
Journal Article
Journal: GSA Bulletin
Published: 01 April 1973
GSA Bulletin (1973) 84 (4): 1243-1260.
.... Stromatolites are present at three horizons, one of them biohermal. The form-genera Inzeria , Baicalia , and Boxonia indicate an upper Riphean age. The mega-planktonic fossil Chuaria occurs near the top of the Kwagunt Formation. The Chuar rocks are probably younger than any other Precambrian rocks in Arizona...
Image
Photomicrographs, backscattered electron (BSE) images, and energy dispersiv...
in > Geology
Published: 01 July 2011
Figure 2. Photomicrographs, backscattered electron (BSE) images, and energy dispersive X-ray spectroscopic (EDS) elemental maps of Chuaria from Sifangtan and Vendotaenia . A–D: Reflected light photomicrograph, BSE image, C, and Fe maps of two Chuaria specimens (SFT-24–1-#6, SFT-24–1-#7). Box
Image
Photomicrographs, backscattered electron (BSE) images, and energy dispersiv...
in > Geology
Published: 01 July 2011
Figure 1. Photomicrographs, backscattered electron (BSE) images, and energy dispersive X-ray spectroscopic (EDS) elemental maps of three Chuaria specimens from Sixi, China. A–F: Reflected light photomicrograph, BSE image, Si, Al, Mg, and Ca maps of specimen (08-SX-DST3–3B3-#4) on bedding
Image
Macroscopic carbonaceous compressions from Nantuo Formation at Songluo (Sou...
in > Geology
Published: 01 June 2015
Figure 2. Macroscopic carbonaceous compressions from Nantuo Formation at Songluo (South China). A–B: Chuaria sp. C–D: Ribbon-shaped Vendotaenia . E–F: Ribbon-shaped Vendotaenia -like fossils with possible blade-stipe-holdfast differentiation. G: Baculiphyca with rhizoidal holdfast