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late veneer model

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Journal Article
Journal: Elements
Published: 01 August 2008
Elements (2008) 4 (4): 247-252.
... to be in chemical equilibrium with the core. The “late veneermodel offers the best explanation for this paradox—it postulates that a flux of primitive meteorites hit the early Earth after core formation had ceased. However, the inferred PGE composition of the hypothetical primitive mantle exhibits slight positive...
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Journal Article
Published: 01 March 2016
American Mineralogist (2016) 101 (3): 540-553.
... formation and atmospheric loss have been erased by addition of a late veneer (see below). Table 3 Accreted material compositions used for model calculations “CI” ppm Reference “Ureilite” ppm Reference C 35000 (1) 30000 (3) H 6900 (1) 2000 (4) N 1500 (1) 30 (3,5) S...
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Journal Article
Journal: Interpretation
Published: 26 May 2015
Interpretation (2015) 3 (3): SY27-SY40.
... traveltime tomogram and the raypath density for the synthetic model are shown in Figure  3b and 3c , respectively. A crosshatched overlay on the tomogram and raypath density plot indicates the locations of the input LVZs. The velocity tomogram (Figure  3b ) has background velocities ranging from 300...
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Journal Article
Journal: PALAIOS
Published: 01 May 2016
PALAIOS (2016) 31 (5): 259-274.
... veneers are documented on fossil-bearing horizons at multiple localities. The pyrite is interpreted to have formed via microbial processes in the hours to weeks following burial of benthic communities. This finding extends the ‘death mask' model for Ediacaran soft-tissue preservation to deep-marine...
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Series: SEPM Special Publication
Published: 01 January 2007
DOI: 10.2110/pec.07.86.0055
EISBN: 9781565762947
... by a three–armed rift system with the Belt–Purcell basin at its center. A model using a Siberia–Laurentia–Australia paleocontinental reconstruction implies that the sedimentary veneer of the pediment washed down the western branch of the rift system to enter the Belt–Purcell basin at a point source on its...
Journal Article
Journal: GSA Bulletin
Published: 01 March 2015
GSA Bulletin (2015) 127 (3-4): 516-538.
...R.H. Lander; S.E. Laubach Abstract A new model accounts for crystal growth patterns and internal textures in quartz cement in sandstone fractures, including massive sealing deposits, thin rinds or veneers that line open fracture surfaces, and bridge structures that span otherwise open fractures...
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Journal Article
Published: 01 September 2009
Bulletin de la Société Géologique de France (2009) 180 (5): 449-456.
... features covered by a thin veneer of anthropogenic Anadara senilis shell-middens. These units provide an opportunity to discuss the return to arid conditions in western Sahara during the Late Holocene, when climate changes induced the alternating occurrence of more or less dry episodes, from around 5 ka...
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Journal Article
Published: 01 July 2000
Journal of the Geological Society (2000) 157 (4): 759-768.
...GEORGE E. WILLIAMS; VICTOR A. GOSTIN Abstract In South Australia, canyons 200–250 km long are incised to depths of c . 1.5 km in late Neoproterozoic (after c . 590 Ma) marine deposits of the Adelaide fold belt and canyons 90 km long and 700 m deep occur in correlative marine strata of the Officer...
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Journal Article
Journal: PALAIOS
Published: 01 May 2012
PALAIOS (2012) 27 (5): 293-303.
... the precipitation of authigenic iron sulfide minerals on, and around, decaying carcasses in association with microbial mats, cementing the sediment as a sole veneer and retaining the external morphology of the organism in relief on the upper and lower surface of coarse-grained sandy event beds. Although this model...
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Series: GSA Memoirs
Published: 01 January 1988
DOI: 10.1130/MEM171-p65
... Nonscaled rock models of the ramp regions of thrust faults develop structures at a late stage of shortening that are similar in geometry, relative mechanical properties, and deformation mechanisms to some basement-cored folds in the Rocky Mountain foreland. Based on these similarities...
Journal Article
Published: 01 March 2010
Journal of Sedimentary Research (2010) 80 (3): 236-251.
... of the presence of aragonite cement in the inner cortex. Stable isotopic and trace element results coupled with SEM investigations indicate that microbes do not play a role in ooid formation, but instead alter the texture and chemistry of ooids after they have formed. A new model of ooid formation is proposed...
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Series: AAPG Memoir
Published: 01 January 1995
DOI: 10.1306/M65604C5
EISBN: 9781629810867
... model for near-toe kinematics. That the sedimentary carapace of the glacier moves faster than the sheet advances suggests that extension in the sedimentary veneer generally exceeds salt sheet advance. Burial of the toe results in cessation of advance, but updip minibasin deepening and downdip salt...
Journal Article
Journal: Geosphere
Published: 01 August 2005
Geosphere (2005) 1 (1): 23-31.
... changes. These data are critical for the creation of an accurate record of past environmental change in eastern North America during the late Quaternary. This paper describes initial results from the compilation and three-dimensional modeling of subsurface geological data obtained from a variety...
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Journal Article
Journal: GSA Bulletin
Published: 01 December 1980
GSA Bulletin (1980) 91 (12_Part_II): 2457-2557.
... ankaramites, relatively thick ankaramite flows; and upper basalts, olivine-alkali basalts, and aphyric trachybasalts and tristanites. The two youngest sequences, tristanites and trachytes, are limited to small flows and hypabyssal intrusions and to thin veneers of tophra. Numerous mafic dikes of varied...
Journal Article
Journal: Geology
Published: 01 October 2000
Geology (2000) 28 (10): 883-886.
... probably define tholeiitic shield–stage structures of the older volcanoes that are now veneered by late alkalic lavas. The three-dimensional gravity method is valuable for characterizing the magmatic systems of basaltic oceanic volcanoes and for defining structures related to landslide and seismic hazards...
FIGURES
Series: SEPM Special Publication
Published: 01 January 1997
DOI: 10.2110/pec.97.56.0163
EISBN: 9781565761797
... sands (i.e., Balanus crenatus). These mobile carbonate sands are transported within a huge clockwise gyre of polar water over the platform. This gives rise to a thin veneer of skeletal sand on the platform interior and carbonate mega-dunes at the margin. At these high latitudes, extreme seasonality...
Journal Article
Journal: GSA Bulletin
Published: 01 February 1976
GSA Bulletin (1976) 87 (2): 241-249.
.... Smaller granitic bodies average less than 3 km thick. Structural and contact metamorphic features of granite and surrounding rocks suggest that felsic masses of batholithic proportions were emplaced at a late stage in the tectonic history of the area. Model configurations combined with structural evidence...
Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP328.14
EISBN: 9781862395763
... and its accompanying pelagic and terrigenous sedimentary veneer respectively. The presence of IAT and CA island arc lavas before and after the Aptian–Albian demonstrates that the compositional change in the Great Arc of the Caribbean was the result of the subduction of chemically differing sedimentary...
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Journal Article
Published: 20 July 2006
Canadian Journal of Earth Sciences (2006) 44 (6): 819-834.
... below the cirque moraine, rock glaciers, and a colluvial veneer overlying the till in the small valleys have cosmogenic 36 Cl ages as old as either ca. 20 or 15 ka, depending on what erosion rate is assumed, indicating that these bodies are Late Wisconsinan in age but post-date the local LGM. Trout...
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Series: Geological Society, London, Special Publications
Published: 01 January 2004
DOI: 10.1144/GSL.SP.2004.229.01.10
EISBN: 9781862394773
.... This is capped by a thin and geographically restricted veneer of a slightly more incompatible-element-rich tholeiite (the Singgalo Formation on Malaita and the upper flow unit at ODP Site 807), distinguished from Kwaimbaita-type basalt by small but significant differences in Sr-, Ndand Pb-isotope ratios. A third...
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