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Bonahaven

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Journal Article
Published: 01 September 1994
Mineralogical Magazine (1994) 58 (3): 486–490.
Journal Article
Published: 01 September 1977
Geological Magazine (1977) 114 (5): 355–364.
Journal Article
Published: 15 May 2017
Journal of the Geological Society (2017) 174 (5): 850–854.
... sulphate levels owing to a continental ice cover, which inhibited weathering. Sulphur isotope compositions evolve from lightest values (down to −3.1‰) at the base of the formation to highly positive compositions in the overlying Bonahaven Dolomite (mean +44.8‰). This trend is consistent with progressive...
FIGURES
Series: Geological Society, London, Memoirs, Geological Society, London, Memoirs
Published: 01 January 2011
DOI: 10.1144/M36.62
EISBN: 9781862394117
... (Lossit) and Bonahaven formations. These strata are exposed in the metamorphic Caledonides of Scotland, although excellent preservation of sedimentary structures can be found at several sites. An extensional setting for this succession has been proposed based on stratigraphic and structural arguments...
FIGURES
Journal Article
Journal: Geology
Published: 01 November 2006
Geology (2006) 34 (11): 909–912.
... that such downturns may occur in both pre-Sturtian and pre-Marinoan strata. In addition, the Bonahaven Dolomite is not a cap carbonate to the Port Askaig Formation, but exhibits a δ 13 C rise to 12‰, which we correlate with the inferred global Keele peak. These data further document the utility of Neoproterozoic...
FIGURES | View All (5)
Journal Article
Published: 01 September 2000
Journal of the Geological Society (2000) 157 (5): 909–914.
...M. D. BRASIER; G. SHIELDS Abstract The δ 13 C of preglacial carbonates beneath the glaciogenic Port Askaig Formation falls from +5‰ to negative values, while least-altered 87 Sr/ 86 Sr values are close to 0.7067. Postglacial ‘cap carbonates’ of the Bonahaven Formation begin with negative δ 13 C...
FIGURES
Journal Article
Published: 01 February 1998
Journal of the Geological Society (1998) 155 (1): 5–12.
...M. D. BRASIER; D. McILROY Abstract A chain of pellets (Neonereites uniserialis) , usually attributed to a coelomate or pseudocoelomate metazoan, is described from the middle Dalradian Bonahaven Formation of western Scotland, in sandstones not far above the Port Askaig Tillite. This trail lies more...
Journal Article
Published: 01 February 1985
Journal of the Geological Society (1985) 142 (1): 167–185.
...I. J. Fairchild Abstract The Bonahaven Formation of northern Islay, Scotland, despite having undergone high-pressure greenschist facies metamorphism, contains many relics of its diagenetic history. Early diagenetic dolomite textures, calcite and clay mineral cements are well preserved locally...
Journal Article
Published: 01 June 1980
Journal of Sedimentary Research (1980) 50 (2): 423–446.
...I. J. Fairchild Abstract Member 3 of the Dalradian Bonahaven Formation of Islay comprises mixed dolomitic-siliciclastic sediments assignable to three facies, all deposited under very shallow marine conditions. The layered facies consists of a centimeter-scale alternation of dolomitic, fine...
Image
Isotopic compositions of pyrite in Port Askaig Formation diamictite. Compos...
Published: 15 May 2017
Fig 3. Isotopic compositions of pyrite in Port Askaig Formation diamictite. Compositions for Port Askaig Formation and overlying Bonahaven Dolomite and Ardrishaig Phyllite plot where expected on best-fit curve for Neoproterozoic pyrite ( Halverson et al. 2010 ) fitted to Dalradian Supergroup
Image
Figure 5. Neoproterozoic C isotopic trends recorded in upper part of Dalrad...
in > Geology
Published: 01 November 2006
Figure 5. Neoproterozoic C isotopic trends recorded in upper part of Dalradian succession (thickness is in km from base of Dalradian). Islay Limestone: circles—Islay, diamonds—Kiltyfanned Lough, squares— Garvellach Islands. Bonahaven Dolomite, Islay: circles—our data, triangles— Brasier and Shields
Image
Geographic distribution of reported Neoproterozoic vasiform microfossils. R...
Published: 01 May 2017
Figure 2 Geographic distribution of reported Neoproterozoic vasiform microfossils. References: Backlundtoppen Group—Svalbard (Knoll and Calder, 1983 ); Simla Slates—India (Nautiyal, 1978 ); Bonahaven Formation—Scotland (Anderson et al., 2013 ); Callison Lake Dolostone– Canada
Image
Compilation of published δ 34 S data measured from the Cryogenian post-glac...
Published: 01 September 2018
in the Amadeus Basin, Australia ( Gorjan et al. 2000 ); (17) Gobabis Member, Namibia ( Gorjan et al. 2003 ); (18) Arena Formation, East Greenland ( Scheller et al. 2018 ); (19) Bonahaven Dolomite Formation, U.K. ( Parnell and Boyce 2017 ). All the compiled data are available in the online Appendix 1 1.
Journal Article
Published: 01 September 2009
Journal of the Geological Society (2009) 166 (5): 845–857.
... carbonate trends persist. The oldest carbonate rocks in the Argyll Group occur in the upper part of the Bonahaven Dolomite Formation, a mixed siliciclastic and carbonate unit. These carbonate rocks are some of the best studied in the Dalradian because they contain well-preserved sedimentary features...
FIGURES
Journal Article
Published: 01 April 1974
Journal of the Geological Society (1974) 130 (2): 175–177.
.... , & SPENCER, M. O. 1972. The Late Precambrian/Lower Cambrian Bonahaven Dolomite of Islay and its stromatolites. Scott. J. Geol. 8, 269-282. SPJELDNAES, N. x964. The Eocambrian Glaciation in Norway. Geol. Rundsch. 54, 24-45. TARLING, D. H. I97I. Principles and Applications of Palaeomagnetism Chapman & Hall...
Series: Geological Society, London, Memoirs, Geological Society, London, Memoirs
Published: 01 January 2011
DOI: 10.1144/M36.29
EISBN: 9781862394117
... the Maieberg anomaly ( Halverson et al. 2005 ), has now been reported globally. The Tayshir anomaly was first documented in Mongolia ( Macdonald et al. 2009 ) and a potentially correlative mid-Cryogenian anomaly is also present in the Bonahaven Fm. of the Dalradian Supergroup in Scotland and Ireland...
FIGURES | View All (4)
Journal Article
Published: 01 December 1980
Journal of the Geological Society (1980) 137 (6): 695–703.
... Springer-Verlag 113 23 Fairchild I. J. Phengite spherules from the Dalradian Bonahaven Formation, Islay, Scotland: glauconitized microfossils? Geol. Mag 1977 5 355 Fischer A. G. Arthur M. A. Secular variations in the pelagic realm Spec. Publ. Soc. econ. Paleontol. Mineral...
Series: Geological Society, London, Special Publications, Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP393.9
EISBN: 9781862396692
... of the Ballachulish Limestone with the Bitter Springs anomaly would make the formations below too old if it is accepted that the base of the Dalradian is <800 Ma. Prave et al. (2009) interpret the negative δ 13 C excursion in the Bonahaven Dolomite (δ 13 C=−8 to −4‰; Prave et al. 2009 ) to record a global...
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Journal Article
Published: 01 August 1988
Journal of the Geological Society (1988) 145 (4): 669–678.
... - - - - - BALLACHULISH _ _ _ - _ Jura Quartzite Bonahaven Dot. Port Askalg Tilllto Llsmore Lst. Leven Schist8 LOCHABER Okncoe Quartrlte Blnneln Quartzlte Ellde Quartzlte Fig. 1. Summary of Dalradian stratigraphy. Only selected formations are named. See Anderton (1985) for details. normal faults, with throws of several...
Journal Article
Published: 01 April 1974
Journal of the Geological Society (1974) 130 (2): 163–177.
... that the eventual source area must have comprised an appreciable area beyond the Caledonian geosyncline. The presence of the well developed limestone and stromatolites in the underlying Islay limestone and dolomites within the Port Askaig Formation itself and the overlying Bonahaven Formation (Spencer & Spencer...