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Journal Article
Published: 01 October 1998
Journal of Foraminiferal Research (1998) 28 (4): 345–348.
...Rudolf Röttger; Christer Dettmering; Ralph Krüger; Rolf Schmaljohann; Johann Hohenegger Abstract The morphology of the gametes of four species of nummulitids is compared. Heterostegina depressa , Cycloclypeus carpenteri and Operculina cf. complanata have biflagellated gametes as most foraminifera...
Journal Article
Published: 01 June 1995
American Mineralogist (1995) 80 (5-6): 475–482.
..., epidote, allanite, and hastingsitic amphibole occur in a few of the samples. The Na-Y garnet can be divided into almandine-spessartine-grossular [Al > 1.6 per formula unit (pfu) for O = 12, hereafter denoted as Al-gamet], and andradite-spessartine (Fe 3+ > 1.3 pfu, hereafter denoted as Fe 3+ -gamet...
Journal Article
Published: 01 April 1990
American Mineralogist (1990) 75 (3-4): 328–344.
... for the pyrope-almandine join from an analysis of three sets of orthopyroxene-gamet Fe-Mg exchange experiments. The derived mixing properties of Fe-Mg garnets are tested by calibrating annite properties from Ferry and Spear’s (1978) experimental data on the gamet-biotite exchange equilibrium. These annite data...
Journal Article
Published: 01 February 1989
American Mineralogist (1989) 74 (1-2): 113–131.
...Marta J. K. Flohr; Malcolm Ross Abstract Ijolite xenoliths occur in gamet-pseudoleucite syenite that forms part of the outer ring of the Magnet Cove alkaline ring-dike complex. Xenoliths were collected from the Diamond Jo quarry located in the southern part of the complex. The xenoliths contain...
Journal Article
Published: 01 October 1980
American Mineralogist (1980) 65 (9-10): 852–866.
... techniques. For coexisting gamet–clinopyroxene, this dependence, which is inferred from independent metamorphic P–T estimates for two areas and thirteen mineral-pair analyses, is summarized by the equation R T ⁢ ln ⁡ K D = ( 2482 ± 845 ) + ( 1509 ± 1392 ) ( X Fe − X Mg ) Gar + ( 2810 ± 954 ) ( X Ca Gar...
The life cycle (alternation of generations) of the hornworts. The (a) <b>gamet</b>...
in > Palynology
Published: 01 December 2012
Figure 7 The life cycle (alternation of generations) of the hornworts. The (a) gametophyte generation with its thallus-like body and rhizoids on the under-surface bears the (b) male antheridium producing the (c) sperm which fertilize the egg within the (d) female archegonium, giving rise to the (e
Journal Article
Journal: PALAIOS
Published: 01 December 2002
PALAIOS (2002) 17 (6): 615–621.
... description of the life cycle of the dominant reef-building organisms. Modern reef corals commonly show synchronous gamete release (mass spawning) but, to date, such a phenomenon has not been reported from the fossil record. The first example of where the life cycle and reproductive ecology of an ancient reef...
FIGURES | View All (4)
Journal Article
Published: 01 October 1996
American Mineralogist (1996) 81 (9-10): 1208–1216.
... but definitive diffusion zone across the interface of the gamet-gamet couple, which yields a value of ∫D ( t )d t = 7.6 × 10 −12 cm 2 . Because D is a function of time through its dependence on temperature, this value of ∫D ( t )d t provides an important constraint on the thermal history during the regional...
Journal Article
Published: 01 August 1990
American Mineralogist (1990) 75 (7-8): 886–908.
... specimen; their compositions change systematically with X sps . After corrections are made for Fe 3+ in biotite, garnet and biotite show several compositional relationships critical to understanding their equilibrium. K D (Fe-Mg, gamet-biotite) varies as a function X sps in garnet, but this relationship...
Journal Article
Published: 01 August 1989
American Mineralogist (1989) 74 (7-8): 840–851.
... -Ca 3 Al 2 (O 4 H 4 ) 3 ] can be predicted. Application of DLS to other gamet structures suggests that mantle gamets (rich in pyrope component) may contain only very limited amounts of water. Copyright © 1989 by the Mineralogical Society of America 1989 ...
Journal Article
Published: 01 August 1987
American Mineralogist (1987) 72 (7-8): 671–680.
..., we evaluate the accuracy and precision of garnet-biotite, gamet-plagioclase-kyanite-quartz, and gamet-rutile-kyanite-ilmenite-quartz thermobarometry for a pelitic sample from the Funeral Mountains of southeastern California. Calibration and analytical uncertainties together propagate into absolute...
Journal Article
Published: 01 April 1987
American Mineralogist (1987) 72 (3-4): 240–254.
...Derrill M. Kerrick Abstract Fibrolite was examined in the Ardara and Fanad contact aureoles of Donegal, Ireland. Textural evidence suggests that fibrolite formed in the later stages of contact metamorphism. Gamet-biotite geothermometry and gamet-plagioclase-Al 2 SiO 5 -quartz geobarom-etry...
Journal Article
Journal: Geology
Published: 01 March 2017
Geology (2017) 45 (3): 199–202.
... hatching. The eggs are only visible ventrally with no dorsal brood pouch or recognized sexual dimorphism. The location of the eggs is consistent with where modern female horseshoe crabs release their unfertilized eggs from the ovarian network within their head. Trilobites likely released their gametes...
Journal Article
Published: 01 April 2013
Journal of Foraminiferal Research (2013) 43 (2): 113–126.
.... Small vesicles lie just beneath the cell membrane and merge with the plasma membrane to release test construction materials at the base of the IOL. This species is gametogamous, where gamonts release biflagellated gametes either through the aperture or within membrane-bound packets that open following...
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