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Reply to discussion on ‘A thermal maturity map based on vitrinite reflectance of British coals’, Journal of the Geological Society, London, 176, 1136–1142, https://doi.org/10.1144/jgs2019-055

View ORCID ProfileJohn Parnell, View ORCID ProfileLiam Bullock and View ORCID ProfileJoseph Armstrong
Journal of the Geological Society, 178, jgs2020-211, 28 December 2020, https://doi.org/10.1144/jgs2020-211
John Parnell
1School of Geosciences, University of Aberdeen, Kings College, Aberdeen AB24 3UE, UK
Roles: [Writing – original draft (Lead)], [Writing – review & editing (Lead)]
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  • ORCID record for John Parnell
  • For correspondence: J.Parnell@abdn.ac.uk
Liam Bullock
2Ocean and Earth Sciences, University of Southampton, National Oceanography Centre, Southampton SO14 3ZH, UK
Roles: [Writing – original draft (Equal)], [Writing – review & editing (Equal)]
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Joseph Armstrong
1School of Geosciences, University of Aberdeen, Kings College, Aberdeen AB24 3UE, UK
Roles: [Writing – original draft (Equal)], [Writing – review & editing (Equal)]
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We welcome the comments of Smith and Rippon (2020) about our map of vitrinite reflectance data derived from Carboniferous coal in Britain (Bullock et al. 2019). The essence of their contribution is that our map is based upon a limited database (103 samples). We are well aware that data are available for other localities, at a range of depths within mines, and in some cases with details of statistical accuracy. Smith and Rippon conclude that the data available are too extensive to make it possible to produce a summary map. That is possibly why, despite the heritage of coal studies in Britain, such a map has not been published. However, the scale at which we have resolved variations in the reflectance values, simplified further in Figure 1, allows realization of the tremendous educational potential in the data. Our purpose was to produce a map, and we have employed a database appropriate to do so, rather than assemble a national database, which is the responsibility of others.

Fig. 1.

Mean vitrinite …

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Journal of the Geological Society: 178 (2)
Journal of the Geological Society
Volume 178, Issue 2
March 2021
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Reply to discussion on ‘A thermal maturity map based on vitrinite reflectance of British coals’, Journal of the Geological Society, London, 176, 1136–1142, https://doi.org/10.1144/jgs2019-055

John Parnell, Liam Bullock and Joseph Armstrong
Journal of the Geological Society, 178, jgs2020-211, 28 December 2020, https://doi.org/10.1144/jgs2020-211
John Parnell
1School of Geosciences, University of Aberdeen, Kings College, Aberdeen AB24 3UE, UK
Roles: [Writing – original draft (Lead)], [Writing – review & editing (Lead)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for John Parnell
  • For correspondence: J.Parnell@abdn.ac.uk
Liam Bullock
2Ocean and Earth Sciences, University of Southampton, National Oceanography Centre, Southampton SO14 3ZH, UK
Roles: [Writing – original draft (Equal)], [Writing – review & editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for Liam Bullock
Joseph Armstrong
1School of Geosciences, University of Aberdeen, Kings College, Aberdeen AB24 3UE, UK
Roles: [Writing – original draft (Equal)], [Writing – review & editing (Equal)]
  • Find this author on Google Scholar
  • Find this author on PubMed
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  • ORCID record for Joseph Armstrong

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Reply to discussion on ‘A thermal maturity map based on vitrinite reflectance of British coals’, Journal of the Geological Society, London, 176, 1136–1142, https://doi.org/10.1144/jgs2019-055

John Parnell, Liam Bullock and Joseph Armstrong
Journal of the Geological Society, 178, jgs2020-211, 28 December 2020, https://doi.org/10.1144/jgs2020-211
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