Rhythmic Deposition in the Carboniferous Oil-Shale Group of Scotland

Greensmith, J. T.

doi:10.1086/626825

Cited by 24 publications

(24 citation statements)

References 10 publications

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“…Although no clinoform geometries are apparent, the overall geometry of the Strathclyde Group is consistent with field observations along the Fife coast, and are interpreted to form part of a major, westerly-prograding wedge of fluvio-deltaic sediments built out into a lacustrine environment dominated by oil-shales (Greensmith, 1962(Greensmith, & 1965.…”

Section: Basin Stratigraphysupporting

confidence: 63%

“…Integration of field exposures with subsurface data, largely derived from extensive coal mining activity over the past two centuries, has enabled a unifying lithostratigraphic framework to be constructed for the Carboniferous rocks of the MVS ( Fig.2; (Greensmith, 1962(Greensmith, & 1965Macgregor, 1968;Fig.2).…”

Section: Basin Stratigraphymentioning

confidence: 99%

“…In Fife and East Lothian, the sedimentary rocks form a significant south-westerly prograding, easterly thickening, sandy clastic, fluvial-deltaic wedge (Greensmith, 1962(Greensmith, & 1965Browne & Monro, 1989). In contrast, coeval sedimentation in parts of West Lothian and the Edinburgh area was dominated by lacustrine oil-shale that has led to the definition of "Lake Cadell" (e.g.…”

Section: Basin Stratigraphymentioning

confidence: 99%

“…In contrast, coeval sedimentation in parts of West Lothian and the Edinburgh area was dominated by lacustrine oil-shale that has led to the definition of "Lake Cadell" (e.g. Cadell, 1925;Greensmith, 1962Greensmith, & 1965.…”

Section: Basin Stratigraphymentioning

confidence: 99%

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Controls on structural styles, basin development and petroleum prospectivity in the Midland Valley of Scotland

Underhill

Monaghan

Browne

2008

Marine and Petroleum Geology

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Section: Basin Stratigraphysupporting

confidence: 63%

Section: Basin Stratigraphymentioning

confidence: 99%

Section: Basin Stratigraphymentioning

confidence: 99%

Section: Basin Stratigraphymentioning

confidence: 99%

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Controls on structural styles, basin development and petroleum prospectivity in the Midland Valley of Scotland

Underhill

Monaghan

Browne

2008

Marine and Petroleum Geology

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“…The Carboniferous strata are divided into the Inverclyde (Tournasian) and Strathclyde (Viséan) Groups (Whyte, 1993 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 6 climate and collectively referred to as Lake Cadell (Greensmith, 1968) (Fig. 2B).…”

Section: Geological Backgroundmentioning

confidence: 99%

A depositional model for spherulitic carbonates associated with alkaline, volcanic lakes

Mercedes‐Martín

Brasier

Rogerson

et al. 2017

Marine and Petroleum Geology

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The South Atlantic Aptian 'Pre-salt' reservoirs are formed by a combination of spherulitic carbonates and Mg-rich clays accumulated in volcanic alkaline lake settings with exotic chemistries. So far, outcrop analogues characterised by metre-thick successions deposited in lacustrine scenarios are elusive so disentangling the genesis of spherulitic carbonates represents a major scientific challenge with business impact. In particular the controls on spatial distribution and the environment of spherulitic facies formation remain poorly constrained, little studied, and hotly debated. To shed light on this conundrum, a spherulitic carbonate-rich, alkaline volcanic lacustrine succession has been analysed at outcrop scale: the Carboniferous East Kirkton Limestone (Scotland). Despite clays being very scarce and limited to layers of amorphous Mg-Si minerals, a diverse array of components were formed, including coated grains, crusts, and build-ups with spherulitic calcitic morphologies. This setting enables the mechanisms of spherulitic calcite development and the patterns of sediment accumulation to be explored in a geobiological and hydrochemical scenario similar to the 'Pre-Salt' subsurface occurrences but divorced from clay influence. The integration of logs, borehole data, outcrop photomosaics and petrographic observations collectively allowed the reconstruction of a depositional model for the East Kirkton lacustrine succession. In this model, calcite spherule nucleation took place at the sediment-water interface in the littoral zone, driven by the co-occurrence of 1) high alkalinity, 2) CaMg rich hydrochemistry, and 3) microbial-derived colloidal exopolymeric substances. These environmental conditions permitted the coeval development of spherulitic cementstone build-ups and spherulitic grainstone-packstone within the wave-agitated zone, and the accumulation of floatstones and laminites of spherulitic grains in deeper lake regions by means of downslope reworking. This model is consistent with the previously documented microbial bloom occurrences and highlights the need to better understand the complex 'microbe-solution' interactions before any reliable facies model is envisaged. Dear Nereo Preto,We thank the Editorial effort and the detailed and constructive review work which can make our submission JMPG-D-17-00060 ("A depositional model for spherulitic carbonates associated with alkaline, volcanic lakes") a relevant contribution for the field.We have addressed all the suggestions, concerns and comments of the reviewers in particular we have highlighted those comparative aspects with the Presalt occurrences, we have amended some terminological issues and we have added some paragraphs in regards of diagenetic aspects relevant for the goal of our work.Thus we hope you find this new version suitable for publication in MPG journal. A detailed rebuttal letter in a point by point fashion is also enclosed.If you would like further changes, please do let us know. Reviewer 1: Overall comments Comment 1 -I think the ...

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