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glendonites

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Journal Article
Journal: Geology
Published: 01 June 2017
Geology (2017) 45 (6): 503–506.
... warming events associated with major carbon cycle perturbations. Paradoxically, many of these extreme greenhouse episodes are preceded or followed by cold climate, perhaps even glacial conditions, as inferred from the occurrence of glendonites in high latitudes. Glendonites are pseudomorphs of ikaite...
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Journal Article
Journal: Geology
Published: 01 February 2017
Geology (2017) 45 (2): 115–118.
... and paleobiological data are shaping current understanding of Ediacaran evolutionary and environmental history. Here, we report the occurrence of silicified glendonites in the Ediacaran Doushantuo Formation deposited in an inner-shelf environment on the South China block. Petrographic evidence suggests...
Journal Article
Journal: Geology
Published: 01 March 2010
Geology (2010) 38 (3): 251–254.
...Gregory D. Price; Elizabeth V. Nunn Abstract Oxygen and carbon isotope data from Cretaceous (Valanginian) glendonites and belemnites from Arctic Svalbard are presented. Oxygen isotope data from well-preserved glendonites, in conjunction with the ikaite to glendonite pseudomorph transition...
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Journal Article
Published: 01 November 2008
Journal of Sedimentary Research (2008) 78 (11): 713–723.
...Tracy D. Frank; Stephanie G. Thomas; Christopher R. Fielding Abstract Glendonites, calcite pseudomorphs after ikaite (CaCO 3 • 6H 2 O), feature prominently in fine-grained, glacially influenced Permian marine strata of eastern Australia, which accumulated in a series of extensional basins...
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Journal Article
Published: 01 November 2007
Journal of Sedimentary Research (2007) 77 (11): 980–991.
...Bruce W. Selleck; Paul F. Carr; Brian G. Jones Abstract Calcite pseudomorphs after ikaite (glendonite) are associated with coldwater depositional systems, including glaciomarine and deepwater settings, as dictated by the limited stability field of ikaite. Ikaite precipitation is favored by elevated...
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Journal Article
Journal: Geology
Published: 01 January 2005
Geology (2005) 33 (1): 9–12.
...Noel P. James; Guy M. Narbonne; Robert W. Dalrymple; T. Kurtis Kyser Abstract Stellate crystals of ferroan dolomite in neritic siliciclastic and carbonate sedimentary rocks between Sturtian and Marinoan glaciations in the Mackenzie Mountains are interpreted as replaced glendonites...
FIGURES
Journal Article
Published: 01 November 2001
American Mineralogist (2001) 86 (11-12): 1530–1533.
...Ian P. Swainson; Robert P. Hammond Abstract Neutron diffraction results are linked to the pre-diffraction, morphological crystallography of E.S. Dana to show that ikaite is the precursor of “glendonite” and “thinolite” and that some of the unusual features of the morphology can easily be explained...
FIGURES
Journal Article
Published: 01 September 2001
South African Journal of Geology (2001) 104 (3): 265–272.
...I. R. McLachlan; H. Tsikos; B. Cairncross Abstract Glendonites are carbonate pseudomorphs after monoclinic crystals of ikaite (calcium carbonate hexahydrate: CaCO 3 .6H 2 O). Ikaite forms at present within organic-rich marine or brackish sediments that are at near freezing temperatures...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2017
GSA Bulletin (2017) 129 (7-8): 771–787.
...Stephen E. Grasby; Gennyne E. McCune; Benoit Beauchamp; Jennifer M. Galloway Abstract Dramatic global climate change in the Early Cretaceous suggests that numerous boreal cool events perturbed otherwise warm conditions. Abundant glendonites in Valanginian and Aptian strata are thought to be key...
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Journal Article
Journal: GSA Bulletin
Published: 24 April 2019
GSA Bulletin (2019) 131 (11-12): 1979–1994.
... an anthropogenically-driven high- p CO 2 atmosphere. This study utilizes facies analysis to constrain the paleobathymetry of Lower Cretaceous glendonites—a pseudomorph after ikaite, a mineral that forms naturally at 7 °C or lower—from two paleo-high-latitude (60–70°N) sites in Svalbard, Arctic Norway, to infer global...
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GEOCHEMICAL DATA FOR <b>GLENDONITES</b> COLLECTED FROM SECTIONS IN THIS STUDY
Published: 01 July 2017
TABLE 1. GEOCHEMICAL DATA FOR GLENDONITES COLLECTED FROM SECTIONS IN THIS STUDY
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GEOCHEMICAL DATA FOR SHALES FROM MEASURED SECTIONS HOSTING <b>GLENDONITES</b>
Published: 01 July 2017
TABLE 2. GEOCHEMICAL DATA FOR SHALES FROM MEASURED SECTIONS HOSTING GLENDONITES
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GEOCHEMICAL DATA FOR SHALES FROM MEASURED SECTIONS HOSTING <b>GLENDONITES</b>
Published: 01 July 2017
TABLE 2. GEOCHEMICAL DATA FOR SHALES FROM MEASURED SECTIONS HOSTING GLENDONITES
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GEOCHEMICAL DATA FOR SHALES FROM MEASURED SECTIONS HOSTING <b>GLENDONITES</b>
Published: 01 July 2017
TABLE 2. GEOCHEMICAL DATA FOR SHALES FROM MEASURED SECTIONS HOSTING GLENDONITES
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Stable isotope data for carbon and oxygen isotope values of <b>glendonites</b> fro...
Published: 01 July 2017
Figure 10. Stable isotope data for carbon and oxygen isotope values of glendonites from the Deer Bay and Christopher Formations. Also shown are data from Williscroft (2013) for methane seep carbonates and associated late-stage cements in the Christopher Formation, immediately overlying the last
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Field photographs of in situ <b>glendonites</b> (A–C); wood (D); coal (E); Ginkoal...
in > Geosphere
Published: 01 October 2016
Figure 4. Field photographs of in situ glendonites (A–C); wood (D); coal (E); Ginkoales leaf impression (F); and Equisitales leaf impression (G) from Festningen.
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Field photographs showing <b>glendonites</b> in highly bioturbated, offshore facie...
Published: 01 November 2008
Figure 3 Field photographs showing glendonites in highly bioturbated, offshore facies of the Wandrawandian Siltstone in the southern Sydney Basin. A) Cross-sectional view of glendonite-bearing horizon showing randomly oriented, bladed forms in sandy mudstone. B) Bedding-plane view
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Carbon and oxygen isotope data from Permian <b>glendonites</b> and brachiopods (Wa...
Published: 01 November 2008
Table 1 Carbon and oxygen isotope data from Permian glendonites and brachiopods (Wandrawandian Siltstone, southern Sydney Basin). Refer to Thomas et al. (2007) for details on individual localities.
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Photomicrographs of <b>glendonites</b> under plane-polarized, transmitted light.  ...
Published: 01 November 2008
Figure 5 Photomicrographs of glendonites under plane-polarized, transmitted light. A) Equant grains of inclusion-zoned calcite (ikaite replacement phase) in matrix of sparry calcite and dispersed silt. Host unit is Wandrawandian Siltstone. Scale bar is 0.5 mm. B) Rounded grains of inclusion
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Paired photomicrographs of <b>glendonites</b>. Scale bars are 0.5 mm.  A)  Stellat...
Published: 01 November 2008
Figure 6 Paired photomicrographs of glendonites. Scale bars are 0.5 mm. A) Stellate cluster of bipyramidal, inclusion-zoned calcite (ikaite replacement phase) surrounded by smaller grains of the same phase set in a mosaic of equant crystals. Grain boundaries show evidence of dissolution