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Bergland Group

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Summary lithostratigraphic columns across the Midcontinent Rift. Lithostrat...
Published: 01 June 2014
Figure 1. Summary lithostratigraphic columns across the Midcontinent Rift. Lithostratigraphy adapted from Davis and Green (1997) for the North Shore Volcanic Group, Hollings et al. (2007) for the Osler Volcanic Group, Cannon and Nicholson (2001) for the Bergland Group, and Hubbard (1975
Journal Article
Journal: Geology
Published: 01 June 2014
Geology (2014) 42 (6): 475–478.
...Figure 1. Summary lithostratigraphic columns across the Midcontinent Rift. Lithostratigraphy adapted from Davis and Green (1997) for the North Shore Volcanic Group, Hollings et al. (2007) for the Osler Volcanic Group, Cannon and Nicholson (2001) for the Bergland Group, and Hubbard (1975...
FIGURES
Series: SEPM Special Publication
Published: 01 January 2012
DOI: 10.2110/sepmsp.101.153
EISBN: 9781565763142
...-scale clay interbeds indicate low-energy facies (indicated by arrows). (G) Rare pebble conglomerates indicate intermittent higher-energy settings than mean depositional energy level; pebbles indicated by arrows. Powder Mill and Bergland Groups Fig. 4. Sedimentary features of the Keweenawan...
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Journal Article
Journal: Geology
Published: 01 September 2016
Geology (2016) 44 (9): 763–766.
...Sami Nabhan; Michael Wiedenbeck; Ralf Milke; Christoph Heubeck Abstract Regionally traceable paleosols in the lower Moodies Group of the Barberton greenstone belt (ca. 3.22 Ga, northeastern South Africa and Swaziland) contain locally abundant silicified nodules, originally composed of pedogenic...
Journal Article
Journal: AAPG Bulletin
Published: 01 June 2002
AAPG Bulletin (2002) 86 (6): 1113–1127.
.... In the White Pine region, these mafic volcanic rocks are overlain by up to 4 km of basalt, andesite, felsite, and quartz-porphyry lava flows that form the Porcupine Volcanics ( Hubbard, 1975 ; Cannon and Nicholson, 1992 ). Taken together, the Portage Lake Volcanics and Porcupine Volcanics form the Bergland...
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Journal Article
Published: 01 December 2000
Journal of Micropalaeontology (2000) 19 (2): 165–175.
... environments. The distribution of groups of dinoflagellate cysts, micrhystridid acritarchs and variations of terrestrial inputs represented by phytoclasts are presumed parameters of the salinity balance during such Late Jurassic depositional environments. In this context, the shagreenate to faintly granulate S...
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Journal Article
Journal: GSA Bulletin
Published: 09 September 2021
GSA Bulletin (2022) 134 (5-6): 1258–1276.
..., geochemical analyses, and petrological approaches. Here we report on the reconstruction of one of the oldest, well-preserved volcano-sedimentary sequences on Earth, the 3.28–3.22 Ga Fig Tree Group in the Barberton Greenstone Belt, South Africa, based on geochronology, provenance, and stratigraphy to provide...
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Journal Article
Published: 01 January 2013
Journal of the Geological Society (2013) 170 (1): 215–223.
... Geologie der Stolzburg-Synklinale im Barberton Bergland (Transvaal, Südafrika) . Diplomarbeit , Geologisch-Paläontologisches Institut, Universität Frankfurt . Reimer T.O. 1983 . Pseudo-oolites in rocks of the Ulundi Formation, lower part of the Archaean Fig Tree Group (South Africa...
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Journal Article
Journal: PALAIOS
Published: 27 February 2020
PALAIOS (2020) 35 (2): 94–109.
... functional groups, and the derived data are chemometrically evaluated. Results indicate that the compressions are, as anticipated, characterized in the crevasse-splay facies by a predominantly aromatic composition. The fossilized-cuticles, however, are mainly characterized by oxygen-containing aliphatics...
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Journal Article
Published: 14 August 2019
Canadian Journal of Earth Sciences (2019) 56 (9): 932–947.
... extension and volcanic extrusion spanned from ∼1109 to ∼1093 Ma. The 3–5 km thick PLF of the Bergland Group marks the end of main-stage volcanism on the Keweenaw Peninsula ( Table 1 ; Fig. 2 ). Uranium/lead zircon determinations from the lower and mid- to upper PLF have estimated dates of 1096 ± 1.8...
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Journal Article
Published: 18 January 2018
Canadian Journal of Earth Sciences (2019) 56 (1): 1–15.
... the compressional deformation event on the Keweenaw peninsula, there appears to have been only epeirogenic events that include the deposition of the clastic Jacobsville Formation over the Oronto Group and Recent glaciation ( Bornhorst and Rose 1994 ). Table 2. Site attitudes, intensities, and remanence data...
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Journal Article
Published: 01 December 2019
South African Journal of Geology (2019) 122 (4): 421–454.
... in the study region are described below. Table 1. Simplified stratigraphic section (not to scale) of formations of the Barberton Supergroup in the northern sector of the BGB. These include the Weltevreden Formation (uppermost Onverwacht Group) and the formations constituting the Fig Tree and Moodies...
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Journal Article
Published: 01 July 2002
European Journal of Mineralogy (2002) 14 (4): 673–686.
... as compared to tri-trioctahedral chlorites, and of swelling (smectitic) mixed-layers which increase ChC. Out of these two factors, the effect of dioctahedral substitution seems to be dominant in the studied sample group that represent mainly higher anchizonal and epizonal rocks. By contrast, Fe 2+ /Mg ratio...
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Journal Article
Published: 01 May 2007
Geological Magazine (2007) 144 (3): 465–486.
...–Stephanian of the South Wales Coalfield, based mainly on the literature summarized in the previous section. Where possible, the nomenclature of these species has been updated using the most recent taxonomic reviews of the relevant plant groups. As with the earlier study of the Central Pennines macrofloras...
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Journal Article
Journal: GSA Bulletin
Published: 25 May 2022
GSA Bulletin (2023) 135 (1-2): 449–466.
... Supergroup on the south side of Lake Superior ( Fig. 3 ) are from oldest to youngest: (1) Siemens Creek Volcanics and Kallander Creek Volcanics (Powder Mill Group) with basaltic to andesitic lava flows; (2) Portage Lake Volcanics (Bergland Group) mostly composed of basaltic to andesitic flows with lesser...
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Journal Article
Published: 01 February 1994
Journal of the Geological Society (1994) 151 (1): 173–194.
.... 1983. A review of British Upper Jurassic ichthyosaurs. PhD, thesis, University of Newcastle upon Tyne. Kunz R. Phytoplankton und palynofacies im Malm NW Deutschlands (Hannoversches Bergland) Palaeontographica, Ahteilung B 1990 216 1 105 Langston, W. 1973. The croeodilian skull...
Journal Article
Journal: Palynology
Published: 02 January 2021
Palynology (2021) 45 (1): 143–163.
.... They have various affinities and have been divided into five groups: (A) pollen and spores; (B) dinoflagellate cysts and algal remains; (C) fungal spores, hyphae and fruit bodies; (D) protists and invertebrate remains; and (E) miscellaneous and unidentified forms. The protists and invertebrate remains...
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Journal Article
Published: 01 July 2021
Russ. Geol. Geophys. (2021) 62 (07): 765–789.
... ). The section has been described in detail several times, including its Lower Cretaceous part. At the same time, various macro- and microfossils are comprehensively studied, which makes it possible to carry out a detailed biostratigraphic subdivision of the section on the basis of several groups of fauna...
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Journal Article
Journal: Interpretation
Published: 24 January 2018
Interpretation (2018) 6 (1): SB77–SB97.
... from Eötvös University of Budapest, Hungary, and a Ph.D. in Geology and Geophysics from Rice University, Houston, Texas. After graduating in 1994, Gabor worked for Amoco, BP Amoco and Vanco Energy in Houston. Since 2007, Gabor is with OMV in Vienna, Austria, working as the Group Chief Geologist...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 2006
AAPG Bulletin (2006) 90 (1): 61–89.
... of Tübingen. He heads a research group of applied sedimentary geology, focusing on carbonate reservoir characterization and outcrop analog studies. He was an AAPG European Distinguished Lecturer in 1996.
 
 Koos Pipping is currently the senior geologist of the Schoonebeek oil-field redevelopment team...
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