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nuclei

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Journal Article
Published: 01 January 2014
Journal of Sedimentary Research (2014) 84 (1): 40-50.
... approach a well-developed rhombohedral habit. These features are most reasonably interpreted as dolomitic rims that formed as syntaxial overgrowths around detrital dolomite nuclei, which in turn originated from erosion of underlying Triassic rocks and triggered selective replacement of fine-grained...
FIGURES | View All (13)
Journal Article
Journal: Clay Minerals
Published: 01 September 2003
Clay Minerals (2003) 38 (3): 259-278.
...J. ROCHA; C. M. MORAIS; C. FERNANDEZ Abstract The main developments taking place in Nuclear Magnetic Resonance Spectroscopy (NMR) of quadrupolar (spin I > 1/2) nuclei with half integer spins in solids, particularly clays and other layered materials, have been reviewed. The advent of Multiple...
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Journal Article
Published: 01 June 1999
American Mineralogist (1999) 84 (5-6): 871-876.
Journal Article
Journal: Paleobiology
Published: 01 October 1977
Paleobiology (1977) 3 (4): 404-414.
Journal Article
Journal: GSA Bulletin
Published: 01 November 1972
GSA Bulletin (1972) 83 (11): 3323-3344.
... volcanism. High Ni/Mg and Cr/Mg ratios in the earliest sodic granites support their derivation from the oceanic crust. The granites display cyclic decrease in Na/K, K/Rb, and Sr/ Rb with time, trends which reflect crustal thickening. The plutonism resulted in the superposition of sialic nuclei on early...
Journal Article
Published: 01 December 1967
American Mineralogist (1967) 52 (11-12): 1901-1903.
..., argues that zircon, monazite, allanite, xenotime, sphene, apatite and uranium minerals have all been correctly identified as halo nuclei by previous workers. Copyright © 1967 by the Mineralogical Society of America 1967 Mineralogical Society of America ...
Journal Article
Published: 01 October 1954
American Mineralogist (1954) 39 (9-10): 761-772.
...Ichikazu Hayase Abstract In each grain of the radioactive minerals contained in haloes in various Japanese granites, the radioactivity was measured by an autoradiographic method; the development of the pleochroic haloes and the radioactivity of the minerals in their nuclei were both studied...
Journal Article
Published: 01 April 1945
Journal of Sedimentary Research (1945) 15 (1): 20-24.
...Lloyd George Henbest Abstract Oolites whose nuclei seem to consist of enhedral quartz crystals are found in a limestone bed of the Hale formation, lower Pennsylvanian age, near Fayetteville, Arkansas, The true character and origin of these nuclei are manifested most clearly in thin section...
Journal Article
Published: 01 April 1932
Journal of Sedimentary Research (1932) 2 (1): 38-45.
Image
In this ruby-bearing retromorphosed amphibolite a low number of <b>nuclei</b> is r...
Published: 01 July 2017
Fig. 1. In this ruby-bearing retromorphosed amphibolite a low number of nuclei is responsible for the crystallization of large individual rubies, some of gem quality (top), whereas when the number of nuclei is large, many rubies too small to be gems (bottom) are found in the same rock. Photo
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Stable-isotope values for the three oncolite constituents (<b>nuclei</b>, cortex, ...
Published: 01 November 2015
Table 1.— Stable-isotope values for the three oncolite constituents (nuclei, cortex, cement). Statistics were run in Statistix 10.0, using a nonparametric Kruskal-Wallis test. The p-value indicates that the three groups are significantly different.
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Large siderite concretions without discrete skeletal <b>nuclei</b>, typical of the...
in > PALAIOS
Published: 01 October 2013
FIGURE 4— Large siderite concretions without discrete skeletal nuclei, typical of the Main Crinoid Bed, Bed 1, and Bed 3. A) Concretion from the Main Crinoid Bed cut perpendicular to bedding demonstrating large diameter. Scale bar  =  50 mm. B) Internal fabric of cut concretion from the Main
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Small concretions with discrete skeletal <b>nuclei</b>, typical of Bed 0, Bed 2, a...
in > PALAIOS
Published: 01 October 2013
FIGURE 5— Small concretions with discrete skeletal nuclei, typical of Bed 0, Bed 2, and Bed 4. A) Concretion nucleated around inarticulate brachiopod. Scale bar  =  5 mm. B) Opposite side of specimen as depicted in view A, showing that this fossil nucleus is enclosed within siderite
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A conceptual picture of the NMR-active <b>nuclei</b> used to study clay minerals, ...
Published: 01 September 2010
F ig . 12. A conceptual picture of the NMR-active nuclei used to study clay minerals, clay-water, cation exchange, and clay-organic interactions.
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FIGURE 9. Bryoliths with various types of <b>nuclei</b>. A) Bivalve nucleated. B) ...
in > PALAIOS
Published: 01 January 2010
FIGURE 9. Bryoliths with various types of nuclei. A) Bivalve nucleated. B) Vermetid and bivalve nucleated. C) Bryolith fully enclosing serpulid tubes. (Scale bars  =  2 cm)
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Time evolution of the (Ba,Sr) CO 3  critical <b>nuclei</b> composition  x  *  =  x...
Published: 01 January 2009
Figure 16. Time evolution of the (Ba,Sr) CO 3 critical nuclei composition x * = x ( t , t ) and mean particle composition x̄ = N SrCO 3 /( N SrCO 3 + N BaCO 3 ).
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A model to show limited (left) and unlimited (right) layer growth of <b>nuclei</b>...
Published: 01 December 2008
Figure 5. A model to show limited (left) and unlimited (right) layer growth of nuclei with (±60°, ±120°) and (0°, 180°) layer rotations, respectively, on a ribbon-like crystal. See the text for details.
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Outline map of India showing distribution of Archaean cratonic <b>nuclei</b>, majo...
Published: 01 June 2006
Figure 1. Outline map of India showing distribution of Archaean cratonic nuclei, major rift valleys, and the late Mesoproterozoic-Neoproterozoic sedimentary successions in peninsular India.
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Representative microprobe analyses (wt. %) of apatites from <b>nuclei</b> and auto...
Published: 01 March 2005
Table 4. Representative microprobe analyses (wt. %) of apatites from nuclei and autonomous phosphatic “pockets” in whewellite-dominated spherulitic aggregates.
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Figure  8. Simultaneous karyokinesis of over 50 <b>nuclei</b> in  Snyderella tabog...
Published: 01 January 2005
Figure 8. Simultaneous karyokinesis of over 50 nuclei in Snyderella tabogae . Sytox stain