Clay mineral assemblages in British Lower Palaeozoic mudrocks

Clay Minerals

Volumn 41, Issue 1, 2006, Pages 473-512

  Merriman, R J ^a  

^a BRITISH GEOLOGICAL SURVEY   (United Kingdom)

Author keywords

b cell dimensions; Clay minerals; K bler index; Metapelitic grade; Na K micas

Indexed keywords

CHLORITE MINERALS; HYDROTHERMAL SYNTHESIS; LITHOLOGY; MINERALOGY; SEDIMENTARY ROCKS; TECTONICS; X RAY DIFFRACTION ANALYSIS;

BURIAL DIAGENESIS; LOWER PALAEOZOIC ROCKS; PLATE TECTONIC ASSEMBLY;

CLAY MINERALS;

CLAY MINERAL; DEVONIAN; DIAGENESIS; MARINE SEDIMENT; METAMORPHISM; MICA; MUDSTONE; PALEOZOIC; SEDIMENTARY ROCK;

CUMBRIA; EAST ANGLIA; ENGLAND; EURASIA; EUROPE; LAKE DISTRICT; MIDLANDS [ENGLAND]; SCOTLAND; SOUTHERN UPLANDS; UNITED KINGDOM; WALES; WESTERN EUROPE;

MICAS;

EID: 33748620329     PISSN: 00098558     EISSN: None     Source Type: Journal    
DOI: 10.1180/0009855064110204     Document Type: Review

References (170)

1. Ahn J.H. & Peacor D.R. (1986) Transmission and analytical electron microscopy of the smectite-to-illite transition. Clays and Clay Minerals, 34, 165-179.
2. Alt J.C. & Teagle D.A.H. (1998) Probing the TAG hydrothermal mound and stockwork: oxygen-isotope profiles from deep ocean drilling. Proceedings of the Ocean Drilling Program, Scientific Results, 158, 285-295.
3. Alt J.C., Teagle D.A.H., Brewer T., Shanks W.C. (III) & Halliday A. (1998) Alteration and mineralization of an oceanic forearc and the ophiolite-ocean crust analogy. Journal of Geophysical Research, 103, 12,365-12,380.
4. André L. (1991) The concealed crystalline basement in Belgium and the 'Brabantia' microplate concept: constraints from the Caledonian magmatic and sedimentary rocks. Annales de la Société de Belgique, 114, 117-139.
5. Árkai P. (1991) Chlorite crystallinity: an empirical approach and correlation with illite crystallinity, coal rank and mineral facies as exemplified by Palaeozoic and Mesozoic rocks of northeast Hungary. Journal of Metamorphic Geology, 9, 723-734.
6. Árkai P. & Ghabrial D. S. (1997) Chlorite crystallinity as an indicator of metamorphic grade of low-temperature meta-igneous rocks: a case study from the Bükk Mountains, northeast Hungary. Clay Minerals, 32, 205-222.
7. Árkai P., Merriman R.J., Roberts B., Peacor D.R. & Toth M. (1996) Crystallinity, crystallite size and lattice strain of illite-muscovite and chlorite: comparison of XRD and TEM data for diagenetic and epizonal pelites. European Journal of Mineralogy, 8, 1119-1137.
8. Awan M.A. & Woodcock N.H. (1991) A white mica crystallinity study of the Berwyn Hills, North Wales. Journal of Metamorphic Geology, 9, 765-773.
9. d. Clays and Clay Minerals, 37, 128-134.
10. Barnes R.P. (in press) The Geology of the Kirkcowan-Wigtown district - a concise account of the geology. Memoir of the British Geological Survey, Sheets 4E, 4W and part of 2 (Scotland). British Geological Survey, Keyworth, Nottingham, UK.
11. Batchelor R.A. & Weir J.A. (1988) Metabentonite geochemistry: magmatic cycles and graptolite extinctions at Dob's Linn, southern Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences, 79, 19-41.
12. Bevins R.E. & Merriman R.J. (1988) Co-existing prehnite-actinolite and prehnite-pumpellyite facies assemblages in the Tal y Fan Metabasite Intrusion, North Wales: Implications for Caledonian metamorphism. Journal of Metamorphic Geology, 6, 17-39.
13. Boles J.R. & Franks S.G. (1979) Clay diagenesis in Wilcox sandstones of southwest Texas: implications of smectite diagenesis on sandstone cementation. Journal of Sedimentary Petrology, 49, 55-70.
14. Bottrell S.H., Greenwood P.B., Yardley B.W.D., Shepherd T.J. & Spiro B. (1990) Metamorphic and post-metamorphic fluid flow in the low-grade rocks of the Harlech Dome, north Wales. Journal of Metamorphic Geology, 8, 131-143.
15. Brearley A.J. (1988) Chloritoid from low grade pelitic rocks in North Wales. Mineralogical Magazine, 52, 394-396.
16. Bridge D.M., Carney J.N., Lawley R.S. & Rushton A.W.A. (1998) Geology of the country around Coventry and Nuneaton. Memoir of the British Geological Survey, Sheet 169 (England and Wales). The Stationary Office, London, for the British Geological Survey.
17. British Geological Survey (1985) Bangor. Sheet 106. Solid Geology. 1:50,000. Keyworth, Nottingham, UK.
18. British Geological Survey (1992a) Kirkcowan, Scotland. Sheet 4W. Solid Geology. 1:50,000. Keyworth, Nottingham, UK.
19. British Geological Survey (1992b) Wigtown, Scotland. Sheet 4E. Solid Geology. 1:50,000. Keyworth, Nottingham, UK.
20. British Geological Survey (1993a) The Rhins of Galloway, Scotland Sheets 1 and 3 with parts of 7 and 4W. Solid Geology. 1:50,000. Keyworth, Nottingham, UK.
21. British Geological Survey (1993b) Rhayader, England and Wales. Sheet 179. Solid Geology. 1:50,000. Keyworth, Nottingham, UK.
22. British Geological Survey (1993c) Llanilar, England and Wales. Sheet 178. Solid with Drift Geology. 1:50,000. Keyworth, Nottingham, UK.
23. British Geological Survey (1993d) Kirkcudbright, Scotland. Sheet 5W. Solid Geology. 1:50,000. Keyworth, Nottingham, UK.
24. British Geological Survey (1994) Geological Map of Wales. Solid Geology. 1:250,000 1st edition. Keyworth, Nottingham, UK.
25. British Geological Survey (1996) Tectonic Map of Britain, Ireland and adjacent areas. (T.C. Pharaoh, J.H. Morris, C.B. Long & P.D. Ryan, compilers). 1:1500,000. Keyworth, Nottingham, UK.
26. British Geological Survey (1997) New Galloway, Scotland. Sheet 9W. Solid Geology. 1:50,000, Keyworth, Nottingham, UK.
27. Buatier M.D., Travé A., Labaume P. & Potdevin J.L. (1997) Dickite related to fluid-sediment interaction and deformation in Pyrenean thrust-fault zones. European Journal of Mineralogy, 9, 857-888.
28. Bucher L. & Frey M. (1994) Petrogenesis of Metamorphic Rocks, 6th edition. Springer-Verlag. Berlin, Heidelberg, Germany.
29. Burst J.F. (1959) Post diagenetic clay mineral-environmental relationships in the Gulf Coast Eocene in clays and clay minerals. Clays and Clay Minerals, 6, 327-341.
30. Carney J.N.C. (1999) Revisiting the Charnian Supergroup: new advances in understanding old rocks. Geology Today, 15, 221-229.
31. Carney J.N.C., Glover B.W. & Pharaoh T.C. (1992) Preconference field excursion: Midlands. British Geological Survey Technical Report, WA/92n2.
32. Carr A.D. (1998) A vitfinite reflectance kinetic model incorporating overpressure retardation. Marine & Petroleum Geology, 16, 355-377.
33. Cave R. (1965) The Nod Glas sediments of Caradoc age in North Wales. Geological Journal, 4, 279-298.
34. Cooper A.H., Fortey N.J., Hughes R.A., Molyneux S.G., Ruston A.W.A. & Stone P. (2004) The Skiddaw Group of the English Lake District. Memoir of the British Geological Survey. British Geological Survey, Keyworth, Nottingham, UK.
35. Crockett R.N. (1975) Slate. Mineral Dossier No. 12. Mineral Resources Consultative Committee, Institute of Geological Sciences. The Stationery Office.
36. Davies J.R., Fletcher C.J.N., Waters R.A. Wilson D., Woodhall D.G. & Zalasiewicz J.A. (1997) Geology of the country around Llanilar and Rhayader. Memoir for 1:50,000 Geological Sheets 178 &179 (England & Wales). The Stationery Office, London, for British Geological Survey.
37. Davies J.R., Wilson D. & Williamson I.T. (2004) Geology of the country around Flint. Memoir of the British Geological Survey, Sheet 108 (England and Wales). HMSO, London.
38. 1 polytypism. Clays and Clay Minerals, 44, 257-275.
39. 39Ar dating of Late Caledonian (Acadian) metamorphism and cooling of K-bentonites and slates from the Welsh Basin, U.K. Earth & Planetary Science Letters, 150, 337-351.
40. Dong H., Peacor D.R., Merriman R.J. & Kemp S.J. (2002) Brinrobertsite: a new R1 interstratified pyrophyllite/smectite-like clay mineral: characterization and geological origin. Mineralogical Magazine, 66, 605-617.
41. Drief A. & Nieto F. (2000) Chemical composition of smectites formed in clastic sediments. Implications for the smectite-illite transformation. Clay Minerals, 35, 665-678.
42. Eberl D.D. (1984) Clay mineral formation and transformation in rocks and soils. Philosophical Transactions of the Royal Society of London, A 311, 241-257.
43. Ehrenberg S.N., Aagaard P., Wilson M.J., Fraser A.R. & Duthie D.M.L. (1993) Depth-dependent transformation of kaolinite to dickite in sandstones of the Norwegian continental shelf. Clay Minerals, 28, 325-352.
44. Essene E.J. & Peacor D.R. (1995) Clay mineral thermometry - A critical perspective. Clays and Clay Minerals, 43, 540-553.
45. Essene E.J. & Peacor D.R. (1997) Illite and smectite: metastable, stable, or unstable? Further discussion and a correction. Clays and Clay Minerals, 45, 116-122.
46. Floyd J.D. (1996) Lithostratigraphy of the Ordovician rocks in the Southern Uplands: Crawford Group, Moffat Shale Group, Leadhills Supergroup. Transactions of the Royal Society of Edinburgh: Earth Sciences, 86, 153-165.
47. Fortey N.J. (1989) Low grade metamorphism in the Lower Ordovician Skiddaw Group of the Lake District, England. Proceedings of the Yorkshire Geological Society, 47, 325-337.
48. Fortey N.J., Roberts B. & Hirons S.R. (1993) Relationship between metamorphism and structure in the Skiddaw Group, English Lake District. Geological Magazine, 130, 631-638.
49. Frey M. (1969) A mixed-layer paragonite/phengite of low-grade metamorphic origin. Contributions to Mineralogy and Petrology, 14, 63-65.
50. Frey M. (1970) The step from diagenesis to metamorphism in pelitic rocks during Alpine orogenesis. Sedimentology, 15, 261-279.
51. 2O, Helvetic Alps, Switzerland. Schweizerische Mineralogische und Petrographische Mitteilungen, 67, 1-11.
52. Frey M. (1987b) Very low-grade metamorphism of clastic sedimentary rocks. Pp. 9-58 in: Low Temperature Metamorphism (M. Frey, editor). Blackie and Son Ltd., Glasgow, UK.
53. Gibbons W. & Horak J. (1990) Contrasting metamorphic terranes in northwest Wales. Pp. 315-327 in: The Cadomian Orogeny (P.S. D'Lomas, R.A Strachan & C.G. Topley, editors). Special Publication, 51. Geological Society, London.
54. Guggenheim S., Bain D.C., Bergaya F., Brigatti M.F., Drits A., Eberl D.D., Formoso M.L.L., Galán E., Merriman R.J., Peacor D.R., Stanjek H. & Watanabe T. (2002) Report of the AIPEA nomenclature committee for 2001: Order, disorder and crystallinity in phyllosilicates and the use of the 'Crystallinity Index'. Clay Minerals, 37, 389-393.
55. Guidotti C.V. & Sassi F.P. (1986) Classification and correlation of metarnorphic facies series by means of muscovite b data from low-grade metapelites. Neues Jahrbuch fur Mineralogie Abhandlungen, 153, 363-380.
56. 1 muscovite. European Journal of Mineralogy, 1, 71-84.
57. Hillier S. (1993) Origin, diagenesis, and mineralogy of chlorite minerals in Devonian lacustrine mudrocks, Orcadian Basin, Scotland. Clays and Clay Minerals, 41, 240-259.
58. Carney J.N.C., Glover B.W. & Pharaoh T.C. (1992) Preconference field excursion: Midlands. British Geological Survey Technical Report, WA/92n2.
59. Carr A.D. (1998) A vitfinite reflectance kinetic model incorporating overpressure retardation. Marine & Petroleum Geology, 16, 355-377.
60. Cave R. (1965) The Nod Glas sediments of Caradoc age in North Wales. Geological Journal, 4, 279-298.
61. Cooper A.H., Fortey N.J., Hughes R.A., Molyneux S.G., Ruston A.W.A. & Stone P. (2004) The Skiddaw Group of the English Lake District. Memoir of the British Geological Survey. British Geological Survey, Keyworth, Nottingham, UK.
62. Crockett R.N. (1975) Slate. Mineral Dossier No. 12. Mineral Resources Consultative Committee, Institute of Geological Sciences. The Stationery Office.
63. Davies J.R., Fletcher C.J.N., Waters R.A. Wilson D., Woodhall D.G. & Zalasiewicz J.A. (1997) Geology of the country around Llanilar and Rhayader. Memoir for 1:50,000 Geological Sheets 178 &179 (England & Wales). The Stationery Office, London, for British Geological Survey.
64. Davies J.R., Wilson D. & Williamson I.T. (2004) Geology of the country around Flint. Memoir of the British Geological Survey, Sheet 108 (England and Wales). HMSO, London.
65. 1 polytypism. Clays and Clay Minerals, 44, 257-275.
66. 39Ar dating of Late Caledonian (Acadian) metamorphism and cooling of K-bentonites and slates from the Welsh Basin, U.K. Earth & Planetary Science Letters, 150, 337-351.
67. Dong H., Peacor D.R., Merriman R.J. & Kemp S.J. (2002) Brinrobertsite: a new R1 interstratified pyrophyllite/smectite-like clay mineral: characterization and geological origin. Mineralogical Magazine, 66, 605-617.
68. Drief A. & Nieto F. (2000) Chemical composition of smectites formed in clastic sediments. Implications for the smectite-illite transformation. Clay Minerals, 35, 665-678.
69. Eberl D.D. (1984) Clay mineral formation and transformation in rocks and soils. Philosophical Transactions of the Royal Society of London, A 311, 241-257.
70. Ehrenberg S.N., Aagaard P., Wilson M.J., Fraser A.R. & Duthie D.M.L. (1993) Depth-dependent transformation of kaolinite to dickite in sandstones of the Norwegian continental shelf. Clay Minerals, 28, 325-352.
71. Essene E.J. & Peacor D.R. (1995) Clay mineral thermometry - A critical perspective. Clays and Clay Minerals, 43, 540-553.
72. Essene E.J. & Peacor D.R. (1997) Illite and smectite: metastable, stable, or unstable? Further discussion and a correction. Clays and Clay Minerals, 45, 116-122.
73. Floyd J.D. (1996) Lithostratigraphy of the Ordovician rocks in the Southern Uplands: Crawford Group, Moffat Shale Group, Leadhills Supergroup. Transactions of the Royal Society of Edinburgh: Earth Sciences, 86, 153-165.
74. Fortey N.J. (1989) Low grade metamorphism in the Lower Ordovician Skiddaw Group of the Lake District, England. Proceedings of the Yorkshire Geological Society, 47, 325-337.
75. Fortey N.J., Roberts B. & Hirons S.R. (1993) Relationship between metamorphism and structure in the Skiddaw Group, English Lake District. Geological Magazine, 130, 631-638.
76. Frey M. (1969) A mixed-layer paragonite/phengite of low-grade metamorphic origin. Contributions to Mineralogy and Petrology, 14, 63-65.
77. Frey M. (1970) The step from diagenesis to metamorphism in pelitic rocks during Alpine orogenesis. Sedimentology, 15, 261-279.
78. 2O, Helvetic Alps, Switzerland. Schweizerische Mineralogische und Petrographische Mitteilungen, 67, 1-11.
79. Frey M. (1987b) Very low-grade metamorphism of clastic sedimentary rocks. Pp. 9-58 in: Low Temperature Metamorphism (M. Frey, editor). Blackie and Son Ltd., Glasgow, UK.
80. Gibbons W. & Horak J. (1990) Contrasting metamorphic terranes in northwest Wales. Pp. 315-327 in: The Cadomian Orogeny (P.S. D'Lomas, R.A Strachan & C.G. Topley, editors). Special Publication, 51. Geological Society, London.
81. Guggenheim S., Bain D.C., Bergaya F., Brigatti M.F., Drits A., Eberl D.D., Formoso M.L.L., Galán E., Merriman R.J., Peacor D.R., Stanjek H. & Watanabe T. (2002) Report of the AIPEA nomenclature committee for 2001: Order, disorder and crystallinity in phyllosilicates and the use of the 'Crystallinity Index'. Clay Minerals, 37, 389-393.
82. Guidotti C.V. & Sassi F.P. (1986) Classification and correlation of metarnorphic facies series by means of muscovite b data from low-grade metapelites. Neues Jahrbuch fur Mineralogie Abhandlungen, 153, 363-380.
83. 1 muscovite. European Journal of Mineralogy, 1, 71-84.
84. Hillier S. (1993) Origin, diagenesis, and mineralogy of chlorite minerals in Devonian lacustrine mudrocks, Orcadian Basin, Scotland. Clays and Clay Minerals, 41, 240-259.
85. Kübler B. (1968) Evaluation quantitative du métamorphism par la cristallinité de l'illite. Bulletin de la Centre de Recherche, Pau-SNPA, 2, 385-397.
86. Lee M.K. (1986) A new gravity survey of the Lake District and three-dimensional model of the granite batholith. Journal of the Geological Society, London, 143, 425-436.
87. Lee M.K., Pharoah T.C., Williamson J.P., Green C.A. & De Vos W. (1991) A new look at Belgian aeromagnetic and gravity data through image-based display and integrated modelling techniques. Geological Magazine, 130, 583-591.
88. Leggett J.K., McKerrow W.S. & Eales M.H. (1979) The Southern Uplands of Scotland: A Lower Palaeozoic accretionary prism. Journal of the Geological Society, London, 136, 755-770.
89. Li G., Peacor D.R., Merriman R.J. & Roberts B. (1994a) The diagenetic to low grade metamorphic evolution of matrix white micas in the system muscovite-paragonite in a mudrock from Central Wales, U.K. Clays and Clay Minerals, 42, 369-381.
90. Li G., Peacor D.R., Merriman R.J., Roberts B. & Van der Pluijm B.A. (1994b) TEM and AEM constraints on the origin and significance of chlorite-mica stacks in slates: an example from Central Wales, UK. Journal of Structural Geology, 16, 1139-1157.
91. Lintern B.C. & Floyd J.D. (2000) The Kirkcudbright-Dalbeattie district - a concise account of the geology. Memoir of the British Geological Survey, Sheets 5W, 5E and part of 6W (Scotland). British Geological Survey, Keyworth, Nottingham, UK.
92. Livi K.J.T., Veblen D.R., Ferry J.M. & Frey M. (1997) Evolution of 2:1 layered silicates in low-grade metamorphosed Liassic shales of Central Switzerland. Journal of Metamorphic Geology, 15, 323-344.
93. Masuda H., O'Neil J.R., Jiang W.-T. & Peacor D.R. (1996) Relations between interlayer composition of authigenic smectite, mineral assemblages, I/S reaction rate and fluid composition in silicic ash of the Nankai Trough. Clays and Clay Minerals, 44, 460-469.
94. McKerrow W.S. (1988) The development of the Iapetus Ocean from the Arenig to the Wenlock. Pp. 405-412 in: The Caledonian-Appalachian Orogen (A.L. Harris & D.J. Fettes, editors). Special Publication, 38, Geological Society, London.
95. McKerrow W.S., Leggett J.K. & Eales M.H. (1977) Imbricate thrust model of the Southern Uplands of Scotland. Nature, 267, 237-239.
96. McMillan A.A. (2001) Geology of the New Galloway and Thornhill district. Memoir of the British Geological Survey, Sheets 9W and 9E (Scotland). British Geological Survey, Keyworth, Nottingham, UK.
97. Merriman R.J. (2002) Contrasting clay mineral assemblages in British Lower Palaeozoic slate belts: the influence of geotectonic setting. Clay Minerals, 37, 207-219.
98. Merriman R.J. (2005a) Clay minerals and sedimentary basin history. European Journal of Mineralogy, 17, 7-20.
99. Merriman R.J. (2005b) From mud to roofing slate: How Wales's best-known building stone was formed. Pp. 14-17 in: Stone in Wales: Materials, Heritage and Conservation (M.R. Coulson, editor). Cadw, Cardiff, UK.
100. Merriman R.J. & Frey M. (1999) Patterns of very low-grade metamorphism in metapelitic rocks. Pp. 61-107 in: Low-Grade Metamorphism (M. Frey & D. Robinson, editors). Blackwell Science, Oxford, UK.
101. Merriman R.J. & Kemp S.J. (1996) Clay minerals and sedimentary basin maturity. Mineralogical Society Bulletin, 111, 7-8.
102. Merriman R.J. & Kemp S.J. (1997) Metamorphism of the Charnian Supergroup in the Loughborough district, 1:50K sheet 141. British Geological Survey Technical Report, WG/97/7, 10 pp, 2 figs.
103. Merriman R.J. & Peacor D.R. (1999) Very low-grade metapelites; mineralogy, microtextures and measuring reaction progress. Pp. 10-60 in: Low-Grade Metamorphism (M. Frey & D. Robinson, editors). Blackwell Science, Oxford, UK.
104. Merriman R.J. & Roberts B. (1985) A survey of white mica crystallinity and polytypes in mudrocks of Snowdonia and Llŷn, N. Wales. Mineralogical Magazine, 49, 305-319.
105. Merriman R.J. & Roberts B. (1990) Metabentonites in the Moffat Shale Group, Southern Uplands of Scotland: Geochemical evidence of ensialic marginal basin volcanism. Geological Magazine, 127, 259-271.
106. Merriman R.J. & Roberts B. (1992) Low grade metamorphism of Lower Palaeozoic strata on the Rhins of Galloway, SW Scotland, 1:50K Sheet 15W. British Geological Survey Technical Report WG/92/40, 9 pp, 3 figs.
107. Merriman R.J. & Roberts B. (2001) Low-grade metamorphism in the Scottish Southern Uplands terrane: deciphering the patterns of accretionary burial, shearing and cryptic aureoles. Transactions of the Royal Society of Edinburgh: Earth Sciences, 91, 521-537.
108. Merriman R.J., Roberts B. & Peacor D.R. (1990) A transmission electron microscope study of white mica crystallite size distribution in a mudstone to slate transitional sequence, North Wales, U.K. Contributions to Mineralogy and Petrology, 106, 27-40.
109. Merriman R.J., Roberts B. & Hirons S.R. (1992) Regional low grade metamorphism in the central part of the Lower Palaeozoic Welsh Basin: an account of the Llanilar and Rhayader Districts, BGS 1:50K sheets 178 & 179. British Geological Survey Technical Report, WG/92/16.
110. Merriman R.J., Pharaoh T.C., Woodcock N.H. & Daly P. (1993) The metamorphic history of the concealed Caledonides of eastern England and their foreland. Geological Magazine, 130, 613-620.
111. Merriman R.J., Rex D.C., Soper N.J. & Peacor D.R. (1995a) The age of Acadian cleavage in northern England, UK: K-Ar and TEM analysis of a Silurian metabentonite. Proceedings of the Yorkshire Geological Society, 50, 255-265.
112. Merriman R.J., Roberts B., Peacor D.R. & Hirons S.R. (1995b) Strain-related differences in the crystal growth of white mica and chlorite: a TEM and XRD study of the development of metapelite microfabrics in the Southern Uplands thrust terrane, Scotland. Journal of Metamorphic Geology, 13, 559-576.
113. Millward D., Johnson E.W., Beddoe-Stephens B., Young B., Kneller B.C., Lee M.K. & Fortey F.J. (2000) Geology of the Ambleside district. Memoir for 1:50,000 Geological Sheets 38 (England & Wales). The Stationery Office, London, for the British Geological Survey.
114. Milodowski A.E. & Zalasiewicz J.A. (1991) The origin, depositional and prograde evolution of chlorite-mica stacks in Llandovery sediments of the central Wales Basin. Geological Magazine, 128, 263-278.
115. Molyneux S.G. (1979) New evidence for the age of the Manx Group, Isle of Man. Pp. 415-422 in: The Caledonides of the British Isles - reviewed. (A.J. Harris, C.H. Holland & B.E. Leake, editors). Special Publication 8, Geological Society, London.
116. Moore D.M. & Reynolds R.C. (1997) X-ray Diffraction and the Identification and Analysis of Clay Minerals, 2nd edition. Oxford University Press, New York.
117. Morse J.S. & Casey W.H. (1988) Ostwald processes and mineral paragenesis in sediments. American Journal of Science, 288, 537-560.
118. Neuhoff P.S., Watt W.S., Bird D.K. & Pedersen A.K. (1997) Timing and structural relations of regional zeolite zones in basalts of the East Greenland continental margin. Geology, 25, 803-806.
119. North F.J. (1946) The Slates of Wales. National Museum of Wales, Cardiff, UK.
120. Offler R., McKnight S. & Morand V. (1998) Tectonothermal history of the western Lachlan Fold Belt, Australia: insights from white micas. Journal of Metamorphic Geology, 16, 531-540.
121. Oliver G.J.H., Smellie J.L., Thomas L.J., Casey D.M., Kemp A.E.S., Evans L.J., Balwin J.R. & Hepworth B.C. (1984) Early Palaeozoic metamorphic history of the Midland Valley, the Southern Uplands-Longford-Down massif and the Lake District, British Isles. Transactions of the Royal Society of Edinburgh, Earth Sciences, 75, 259-273.
122. Ostwald W.Z. (1897) Studien uber die Bildung und Umwandlung fester Körper. 1. Abhandlung: Bersstattigung und Begrundlung. Zeit. Physik Chemie, 22, 289-330.
123. Peacor D.R. (1992) Diagenesis and low-grade metamorphism of shales and states. Pp. 335-380 in: Minerals and Reactions at the Atomic Scale: Transmission Electron Microscopy (P.R. Buseck, editor). Reviews in Mineralogy, 27. Mineralogical Society of America, Washington, D.C.
124. Petterson M.G., Beddoe-Stephens B., Millward D. & Johnson E.W. (1992) A pre-caldera plateau-andesite field in the Borrowdale Volcanic Group of the English Lake District. Journal of the Geological Society, London, 149, 889-906.
125. Pharaoh T.C., Merriman R.J., Webb P.C. & Beckinsale R.D. (1987) The concealed Caledonides of eastern England: preliminary results of a multi-disciplinary study. Proceedings of the Yorkshire Geological Society, 46, 355-369.
126. Pharaoh T.C., Merriman R.J., Evans J.A., Brewer T.S., Webb P.C. & Smith N.J.P. (1991) Early Palaeozoic arc-related volcanism in the concealed Caledonides of southern Britain. Annales de la Société de Belgique, 114, 63-91.
127. Pharaoh T.C., Molyneux S.G., Merriman R.J. Lee, M.K. & Verniers J. (1993) The Caledonides of the Anglo-Brabant Massif reviewed. Geological Magazine, 130, 561-562.
128. Pharaoh T.C., England R.W., Verniers J. Zelaźniewicz A. (1997) Introduction: geological and geophysical studies in the Trans-European Suture Zone. Geological Magazine, 134, 585-590.
129. Phillips E.R., Barnes R.P., Boland M.P., Fortey N.J. & McMillan A.A. (1995) The Moniaive Shear Zone: a major zone of sinistral strike-slip deformation in the Southern Uplands of Scotland. Scottish Journal of Geology, 31, 139-149.
130. Power G.M. & Barnes R.P. (1999) Relationships between metamorphism and structure on the northern side edge of eastern Avalonia in the Manx Group, Isle of Man. Pp. 289-305 in: In Sight of the Suture: the Palaeozoic geology of the Isle of Man in its Iapetus Ocean context (N.H. Woodcock, D.G. Quirk, W.R. Fitches & R.P Barnes, editors). Special Publications 160, Geological Society, London.
131. Reedman A.J., Leveridge B.E. & Evans R.B. (1984) The Arfon Group ('Arvonian') of North Wales. Proceedings of the Geologists' Association, 95, 313-321.
132. Reynolds R.C. & Reynolds R.C. (1996) Description of Newmod-for-Windows. The Calculation of One-dimensional X-ray Diffraction Patterns of Mixed-Layered Clay Minerals. R.C. Reynolds, Jr., 8 Brook Drive, Hanover, NH, USA.
133. Roberts B. & Merriman R.J. (1985) The distinction between Caledonian burial and regional metamorphism in metapelites from North Wales: an analysis of isocryst patterns. Journal of the Geological Society of London, 142, 615-624.
134. Roberts B. & Merriman R.J. (1990) Cambrian and Ordovician metabentonites and their relevance to the origins of associated mudrocks in the northern sector of the Lower Palaeozoic Welsh marginal basin. Geological Magazine, 127, 31-43.
135. Roberts B., Evans J.A., Merriman R.J. & Smith M. (1989) Discussion on: 'Bevins, R.E. & Robinson, D. 1988. Low grade metamorphism of the Welsh Basin Lower Palaeozoic succession: an example of diastathermal metamorphism?" Journal of the Geological Society, London, 146, 885-90.
136. Roberts B., Morrison C. & Hirons S. (1990) Low grade metamorphism of the Manx Group, Isle of Man: a comparative study of white mica 'crystallinity' techniques. Journal of the Geological Society, London, 147, 271-277.
137. Roberts B., Merriman R.J. & Pratt W. (1991) The relative influences of strain, lithology and stratigraphical depth on white mica (illite) crystallinity in mudrocks from the district centred on the Corris Slate Belt, Gwynedd-Powys. Geological Magazine, 128, 633-645.
138. Roberts B., Merriman R.J., Hirons S.R., Fletcher C.J.N. & Wilson D. (1996) Synchronous very low grade metamorphism, contraction and inversion in the central part of the Welsh Lower Palaeozoic Basin. Journal of the Geological Society, London, 153, 277-286.
139. Robinson D. (1987) Transition from diagenesis to metamorphism in extensional and collisional settings. Geology, 15, 866-869.
140. Robinson D. & Bevins R.E. (1986) Incipient metamorphism in the Lower Palaeozic marginal basin of Wales. Journal of Metamorphic Geology, 4, 101-113.
141. Romano M. & Spears D.A. (1991) Bentonites from the Horton Formation (Upper Silurian) of Ribblesdale Yorkshire. Proceedings of the Yorkshire Geological Society, 48, 277-285.
142. Ruiz Cruz M.D. & Andreo B. (1996) Genesis and transformation of dickite in Permo-Triassic sediments (Betic Cordilleras, Spain). Clay Minerals, 31, 133-152.
143. Rushton A.W.A. & Fortey R.A. (1992) Tremadoc. P. 24 in: Atlas of Palaeogeography and Lithofacies (J.C.W. Cope, J.K. Ingham & P.F. Rawson, editors). Memoir No. 13, Geological Society of London.
144. Schmidt D. & Livi K.J.T. (1999) HRTEM and SAED investigations of polytypism, stacking disorder, crystal growth, and vacancies in chlorite from subgreenschist facies outcrops. American Mineralogist, 84, 160-170.
145. Schmidt S.Th. & Robinson D. (1997) Metamorphic grade and porosity/ permeability controls on mafic phyllosilicate distributions in a regional zeolite to greenschist facies transition of the North Shore Volcanic Group, Minnesota. Geological Society of America Bulletin, 109, 683-697.
146. 39Ar laser microprobe. Geology, 31, 219-222.
147. Smith N.J.P. & Rushton A.W.A. (1993) Cambrian and Ordovician stratigraphy related to structure and seismic profiles in the western part of the English Midlands. Geological Magazine, 130, 665-671.
148. Soper N.J & Dunning F.G. (2005) Structure and sequence of the Ingleton Group, basement to the central Pennines of northern England. Proceedings of the Yorkshire Geological Society, 55, 241-261.
149. Soper N.J. & Woodcock N.H. (2003) The lost Old Red Standstone of England and Wales: a record of post-Iapetan flexure of Early Devonian transtension? Geological Magazine, 140, 627-647.
150. Soper N.J., Webb B.C. & Woodcock N.J. (1987) Late Caledonian (Acadian) transpression in north West England: timings, geometry and geotectonic significance. Proceedings of the Yorkshire Geological Society, 46, 175-192.
151. Sorby H.C. (1853) On the origin of slaty cleavage. New Philosophical Journal (Edinburgh), 55, 137-148.
152. Sorby H.C. (1908) On the application of quantitative methods to the study of the structure and history of rocks. Quarterly Journal of the Geological Society of London, 64, 171-233.
153. Środoń J. (1999) Nature of mixed-layer clays and mechanisms of their formation and alteration. Annual Reviews of Earth and Planetary Science, 27, 19-53.
154. Stone P. (1995) The Geology of the Rhins of Galloway district. Memoir of the British Geological Survey, Sheets land 3 (Scotland). British Geological Survey, Keyworth, Nottingham.
155. Stone P. & Merriman R.J. (2004) Basin thermal history favours an accretionary origin for the Southern Uplands terrane, Scottish Caledonides. Journal of the Geological Society, London, 161, 829-836.
156. Stone P., Cooper A.H. & Evans J.A. (1999) The Skiddaw Group (English Lake District) reviewed: early Palaeozoic sedimentation and tectonism at the northern margin of Avalonia. Pp. 325-336 in: In Sight of the Suture: the Geology of the Isle of Man in its Iapetus Ocean Context (N.H. Woodcock, W.R. Fitches, D.G. Quirk & R.P. Barnes, editors). Special Publication 160, Geological Society, London.
157. Thomas L.J. (1986) Low Grade Metamorphism of the Lake District, England. Unpublished PhD thesis, University of St. Andrews, UK.
158. Thorpe R.S., Beckinsale R.D., Patchett P.D., Piper J.D.A., Davies G.R. & Evans J.A. (1984) Crustal growth and late Precambrian-early Palaeozoic plate tectonic evolution of England and Wales. Journal of the Geological Society of London, 141, 521-536.
159. Underwood M.B., Laughland M.M. & Kang S.M. (1993) A comparison among organic and inorganic indicators of diagenesis and low-temperature metamorphism, Tertiary Shimanto Belt, Shikoku, Japan. Pp. 45-61 in: Thermal Evolution of the Tertiary Shimanto Belt, Southwest Japan: An example of Ridge-trench Interaction (M.B. Underwood, editor). Special Paper 273, Geological Society of America, Boulder, Colorado.
160. van de Pluijm B.A., Ho N.-C., Peacor D.R. & Merriman R.J. (1998) Contradictions of slate formation resolved? Nature, 392, 348.
161. Velde B. (1968) The effects of chemical reduction on the stability of pyrophyllite and kaolinite in pelitic rocks. Journal of Sedimentary Petrology, 38, 13-16.
162. Warr L.N. & Nieto F. (1998) Crystallite thickness and defect density of phyllosilicates in low-temperature metamorphic pelites: a TEM and XRD study of clay-mineral crystallinity-index standards. The Canadian Mineralogist, 36, 1453-1474.
163. Warr L.N. & Rice A.H.N. (1994) Interlaboratory standardization and calibration of clay mineral crystallinity and crystallite size data. Journal of Metamorphic Geology, 12, 141-152.
164. Weaver C.E. (1959) The clay petrology of sediments. Pp. 15-187 in: Proceedings of the 6th National Conference, Clays and Clay Minerals.
165. Weaver C.E. (1960) Possible uses of clay minerals in search for oil. Bulletin of the American Association of Petroleum Geologists, 44, 1505-1518.
166. Woodcock N.H. (1984) Early Palaeozoic sedimentation and tectonics in Wales. Proceedings of the Geologists Association, 95, 323-335.
167. Woodcock N.H. (1990) Sequence stratigraphy of the Palaeozoic Welsh Basin. Journal of the Geological Society London 147, 537-547.
168. Woodcock N.H. & Pharaoh T.C. (1993) Silurian facies beneath East Anglia. Geological Magazine, 130, 681-690.
169. Woodcock N.H., Quirk D.G., Fitches W.R. & Barnes R.P. (1999) In sight of the Suture: the early Palaeozoic history of the Isle of Man. Pp. 1-10 in: In Sight of the Suture: the Palaeozoic Geology of the Isle of Man in its Iapetus Ocean Context (N.H. Woodcock, D.G. Quirk, W.R. Fitches & R.P Barnes, editors). Special Publications 160, Geological Society, London.
170. Woodland B.G. (1985) Relationship of concretions and chlorite-muscovite porphyroblasts to the development of domainal cleavage in low-grade metamorphic deformed rocks from north-central Wales, Great Britain. Journal of Structural Geology, 7, 205-215.