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... in sampling due to the presence of marl layers, has limited the identification of M0r in a number of sections. An integrated multidisciplinary investigation of lower Cretaceous sediments at the base of the Poggio le Guaine (PLG) core (Northern Apennines, central Italy) was carried out to identify...
Published: 01 January 2014
DOI: 10.5724/gcs.14.33.0228
EISBN: 978-0-9836097-9-0
... diapir walls in the northern sector of the basin. The oil is believed to have migrated from the Lower Jurassic marls along the faults created (or used) during the salt uplift, feeding a major sandstone reservoir of Aptian age (Figueira da Foz Formation) ( Fig. 4 ). These pathways have been active...
Published: 01 December 2012
DOI: 10.5724/gcs.12.32.0347
EISBN: 978-0-9836097-8-0
... tract (low frequency). The NMR log shows the best reservoir conditions (free fluid-light blue area) in the highstand system tract. Upper Cenomanian (Imbetiba Formation): In the distal portion of the Campos basin the Imbetiba Formation is characterized by marls and shales ( Winter et al...
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Series: GSA Special Papers
Published: 01 September 2010
DOI: 10.1130/2010.2465(23)
..., are encircled by a sequence of incompetent marls and chalks. These weak beds accommodated space incompatibilities during block deformation of the competent beds beneath and above. Thick chert beds form the prominent outer collar of the central uplift. Radial folding and faulting are the most conspicuous...
Journal Article
Published: 01 April 2007
Clays and Clay Minerals (2007) 55 (2): 177-188.
FIGURES | View All (9)
Journal Article
Published: 01 June 2006
Clays and Clay Minerals (2006) 54 (3): 314-323.
...W. Crawford Elliott; Ankan Basu; J. Marion Wampler; R. Douglas Elmore; Georg H. Grathoff Abstract The clay fractions of Jurassic marls in the Great Estuarine Group in southern Isle of Skye are composed of mixed-layered illite-smectite (I-S) with large percentages (>85%) of illite layers...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2409(08)
... ). This latter region falls on the Corfu thrust sheet, which underlies the Igoumenitsa thrust sheet (Fig. 1) . We tentatively interpret data from Miocene marls on the same thrust sheet in mainland Greece (PM1, Figs. 2 and 5 ) as having a post-tilting magnetization of Pliocene age that indicates a rotation...
Series: GSA Field Guide
Published: 01 January 2005
DOI: 10.1130/2005.fld006(19)
EISBN: 9780813756066
... emanating from the high mountains to the east provided large amounts of clastic material that was deposited in deltas along the mountain fronts ( Lemons et al., 1996 ). Spits, barriers, bars, and beaches were supplied by alluvium and weathered bedrock in regions with little riverine input. Muds and marls...
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Journal Article
Published: 01 March 2002
Journal of Sedimentary Research (2002) 72 (2): 252-267.
...) is composed of a carbonaceous marl (TOC contents between 1.2 and 23.2 wt %) with intercalated phosphate-rich laminae, lenses, and layers. Subordinate lithologies include ash layers, dolomitized horizons, and siliceous beds. We distinguished five lithological units: (1) a gray marl unit lacking major phosphate...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 2002
GSA Bulletin (2002) 114 (1): 12-23.
... be expected to have caused aquifer-system consolidation, resulting in gradual subsidence. Comparison of our InSAR observations with calculations of the expected consolidation shows that in areas where marl layers are known to compose part of the upper 30 m of the profile, estimated consolidation settlements...
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Journal Article
Published: 01 October 2001
Journal of Foraminiferal Research (2001) 31 (4): 294-308.
... texture and non-selected grains. A relationship between test microstructure and paleobathymetric conditions for the Monte Piano Marl, Ranzano Sandstone, and Antognola Marl Formations was observed. An almost exclusive presence of agglutinated taxa showing microstructures I and II characterized the “facies...
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Journal Article
Published: 01 September 2001
Geological Magazine (2001) 138 (5): 511-539.
... and core have been subdivided into four main mudrock lithological types: (a) medium-dark–dark-grey marl; (b) medium-dark–dark grey–greenish black shale; (c) dark-grey–olive-black laminated shale; (d) greyish-black–brownish-black mudstone. The sections also contain subordinate amounts of siltstone...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 2001
AAPG Bulletin (2001) 85 (1): 51-84.
..., and the loss of section at the top of the Wabamun in the 6-29-81-15w6 well. Log traces are gamma ray. Facies indicated for cored intervals only. Table 1 Lithofacies and Environments in the Wabamun Group in the Parkland Area Laminated marlstone/wackestone lithofacies. The basal marls consist...
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Journal Article
Journal: Geology
Published: 01 September 2000
Geology (2000) 28 (9): 791-794.
...Lesley Cherns; V. Paul Wright Abstract In the Silurian carbonate platform succession of Gotland, Sweden, interreef limestone and marl sequences have shallow-marine shelly assemblages dominated by brachiopods, typical of many Paleozoic benthic faunas. Locally, from similar facies, where early...
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Journal Article
Journal: GSA Bulletin
Published: 01 June 2000
GSA Bulletin (2000) 112 (6): 943-958.
... relatively deep-water conditions in Lake Agassiz. Overlying this is a spatially and temporally variable mixture of silt, sand, peat, gyttja, and marl, containing an allochthonous assemblage of siliceous microfossils and plant macrofossils with a wide range of radiocarbon dates. These sediments were deposited...
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Journal Article
Published: 01 May 2000
Journal of Sedimentary Research (2000) 70 (3): 504-519.
... Globigerina Marls. Onlap configurations and paleo-bathymetric data from the western outcrops of the Annot Sandstones enables a contour map of the pre-Annot Sandstone basin-floor topography to be reconstructed. The basin comprised a northern and a southern sub-basin, which were separated by a ridge, through...
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Journal Article
Published: 01 May 2000
Journal of Sedimentary Research (2000) 70 (3): 549-558.
... ( Fig. 1 ). They are mainly carbonate sediments, including limestones, dolomites and dolomitic marls, mudstones, Mg-rich evaporitic deposits (magnesite, hydromagnesite, and huntite), and very minor amounts of diatomite, chert, lignite, and volcanic ash ( Calvo et al. 1995 ; Stamatakis 1995...
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