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extrudites

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Series: Geological Society, London, Special Publications
Published: 01 January 2006
DOI: 10.1144/GSL.SP.2006.254.01.15
EISBN: 9781862395022
... geometry (assuming that erosion of the sand does not occur) being the shape and topography of the surface onto which extrusion occurs, and any subsequent remobilization during burial. Sand sheets are the extrudites of relevance to hydrocarbon reservoirs, although the presence of sand volcanoes may give...
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Journal Article
Published: 01 July 2013
Journal of the Geological Society (2013) 170 (4): 593-602.
..., the expelled sediment forming an extruded sheet of sand. The sand sheet formed during a single prolonged eruption event with the interaction of radial gravity currents from the hundreds of vents exerting control on the internal architecture of the extrudite. Based on our observations, here we develop a process...
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Image
Schematic illustration of formation of injectites and <b>extrudites</b> in the nor...
Published: 01 March 2016
Fig. 1. Schematic illustration of formation of injectites and extrudites in the northern North Sea with interpreted fluid pressure (F1 and F2) and lithostatic pressure (L1 and L2) below points P1 and P2 at the time of sand extrusion (E2). Differential loading of the prograding Naust Formation
Journal Article
Journal: GSA Bulletin
Published: 01 November 2015
GSA Bulletin (2015) 127 (11-12): 1816-1830.
... of these confined, relatively deep, laminar flow–induced injectites are very different from injectites that reach the surface and produce extrudites. Surface-linked injectites are associated with open conduits where a greater fraction of carrier fluid to particles can be accommodated, enabling highly turbulent...
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Process-based model of <b>extrudite</b> formation. ( a ) Where multiple, closely s...
Published: 01 July 2013
Fig. 10. Process-based model of extrudite formation. ( a ) Where multiple, closely spaced vents are present, the interaction of gravity currents will produce a sand sheet with continuous laminations between vents. ( b ) A single vent will produce a discrete feature, such as a mound owing
Image
Variations in modal heavy-mineral contents in the Panoche Fm, Dosados Mbr, ...
Published: 01 April 2017
Fig. 3.— Variations in modal heavy-mineral contents in the Panoche Fm, Dosados Mbr, the intrusive complex and the extrudite complex of the PGIC.
Image
( a ) Location of the Panoche Giant Injection Complex (PGIC). ( b ) The sau...
Published: 07 December 2017
, sandstone intrusions; diagonal stripe, depositional sandstone; grey, mudstone and siltstone; verticle stripe, sand extrudites. Sample locations: X, depositional sandstone (turbiditic channel); Y, sandstone sill. Figure 1d has been modified from Scott et al . (2013) .
Image
Extrusive sandstones in unit 4, the Dos Palos Shale Member, Marca Canyon (M...
Published: 01 February 2013
of the sandstone extrudite. (B) Internal sandstone extrusion geometry. (i) mounded morphology with internal subvertical laminae that represent the vents of sand volcanoes with surrounding draped low-angle bedded sandstone, which commonly display soft-sediment deformation; (ii) interpretation showing steeply
Image
(A) Location of Panoche Giant Injection Complex (PGIC) field area. (B) Geol...
Published: 01 April 2017
Figure 1. (A) Location of Panoche Giant Injection Complex (PGIC) field area. (B) Geological map of field area (after Vigorito and Hurst, 2017 ). Moreno Formation (Fm) members as follows: C = Cima Lentil (L.) (sand extrudite, Danian age); D = Dosados; DP = Dos Palos; M = Marca; T = Tierra Loma
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Recognition criteria for distinguishing between laminar and turbulent flow ...
Published: 01 November 2015
bounded by or injected by one-grain-thick sand-filled fissures. Dikes forming extensive vertical conduits, potentially forming pipes and subsequently extrudites, are also an indicator of turbulent flow. (B) Schematic diagram of typical injectite architecture and structures associated with laminar flow.
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( a ) Location of the Panoche Hills, California; red lines denote Panoche G...
Published: 01 May 2008
part dominated by dykes; (3) palaeo sea floor with sand extrudites and carbonate cold-seep fossil communities.
Image
( a ) Lower unit of the intrusive network, north of Marca Canyon ( Fig. 1 )...
Published: 01 May 2008
volcano within the Cima Lentil (sand extrudites). Beds dip away from the feeder conduit.
Journal Article
Published: 01 May 2008
Journal of the Geological Society (2008) 165 (3): 609-612.
... part dominated by dykes; (3) palaeo sea floor with sand extrudites and carbonate cold-seep fossil communities. ...
FIGURES
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The lithostratigraphy, thickness, net-to-gross (N/G) ratio, and proportions...
Published: 01 February 2013
for correlating logged sections. Each unit has a different proportion of undeformed depositional units, remobilized parent sandstone units, sandstone sills, low-angle dikes, sandstone extrudites, and host mudstones: Unit 1 is characterized by remobilized depositional sandstones in the Panoche Formation
Journal Article
Published: 01 April 2017
Journal of Sedimentary Research (2017) 87 (4): 388-405.
...Fig. 3.— Variations in modal heavy-mineral contents in the Panoche Fm, Dosados Mbr, the intrusive complex and the extrudite complex of the PGIC. ...
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Journal Article
Published: 01 November 2007
Geological Magazine (2007) 144 (6): 1029-1030.
... without sedimentological insight. The paper on sand ‘extrudites’ nicely mixes seismic and field descriptions of these volumetrically minor stratigraphic curios. An interesting discussion of visual cognition pitfalls in seismic display has general application. Exploration acreage is too valuable...
Journal Article
Journal: Geology
Published: 01 May 2012
Geology (2012) 40 (5): 467-470.
... extrusive sand (extrudite). There have been no reports of extrusive sands as voluminous as several cubic kilometers. Typically, extrusive sands connect to their parent sandbody or sandbodies in the subsurface via hydraulic fractures. Sand accumulates within these hydraulic fractures and in larger laccolith...
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Journal Article
Published: 01 January 2013
Journal of the Geological Society (2013) 170 (1): 133-145.
... below the top of the mounds that therefore were interpreted as mud diapirs ( Løseth et al . 2003 ). Improved seismic images and well data led Huuse (2008) and Rodrigues et al . (2009) to identify intrusive sand bodies, 150–250 m below the top of the mounds. Sand injectites and extrudites have been...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2015
GSA Bulletin (2015) 127 (7-8): 982-1000.
..., and the lateral fining and thinning of the breccias away from the dike terminations suggest that the breccias are extruded deposits (extrudites) vented from the dikes. This facies constitutes carbonate lenses and concretions composed mainly of micritic calcite. Carbonate lenses are irregular, massive...
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Journal Article
Journal: AAPG Bulletin
Published: 01 February 2013
AAPG Bulletin (2013) 97 (2): 309-343.
... of the sandstone extrudite. (B) Internal sandstone extrusion geometry. (i) mounded morphology with internal subvertical laminae that represent the vents of sand volcanoes with surrounding draped low-angle bedded sandstone, which commonly display soft-sediment deformation; (ii) interpretation showing steeply...
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