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CONYBEARE, WILLIAM DANIEL (b. London,
England, June 1787; d. Llandaff, Wales, 12 August
acceptance of occasional paroxysmal episodes, the
overall trend of earth history being one of progressive
diminution in the intensity of geological processes
coupled with a progressive rise in the complexity of
the organic world, culminating in the appearance of
Works are listed in the order cited in the text.
(1) Conybeare and W. Phillips, Outlines of the Geology
of England and Wales, With an Introductory Compendium
of the General Principles of That Science, and Comparative
Views of the Structure of Foreign Countries. Part I
[all issued] (London, 1822).
(2) W. Buckland and Conybeare, “Observations on the
South Western Coal District of England,” in Transactions
of the Geological Society of London, 2nd ser., 1, pt. 1 (1822),
(3) Conybeare, “Memoir Illustrative of a General Geological
Map of the Principal Mountain Chains of Europe,”
in Annals of Philosophy, n.s. 5 (1823), 1-16, 135-149,
210-218, 278-289, 356-359; n.s. 6 (1824), 214-219.
(4) Conybeare and H. T. De La Beche, “Notice of a
Discovery of a New Fossil Animal, Forming a Link Between
the Ichthyosaurus and the Crocodile; Together With
General Remarks on the Osteology of the Ichthyosaurus,”
in Transactions of the Geological Society of London,5
(1821), 558-594; Conybeare, “Additional Notices on the
Fossil Genera Ichthyosaurus and Plesiosaurus,” ibid., 2nd
ser., 1, pt. 1 (1822), 103-123; and “On the Discovery of
an Almost Perfect Skeleton of the Plesisaurus,” ibid., pt.
2 (1824), 381-389.
(5) Conybeare, “On the Hydrographical Basin of the
Thames, With a View More Especially to Investigate the
Causes Which Have Operated in the Formation of the
Valleys of That River, and Its Tributary Streams,” in Proceedings
of the Geological Society of London,1, no. 12
(6) Conybeare, “Answer to Dr Fleming's View of the
Evidence From the Animal Kingdom, as to the Former
Temperature of the Northern Regions,” in Edinburgh New
Philosophical Journal,7 (1829), 142-152.
(7) Conybeare, “On Mr Lyell's ‘Principles of
in Philosophical Magazine and Annals, n.s. 8 (1830),
215-219; and “An Examination of Those Phaenomena of
Geology, Which Seem to Bear Most Directly on Theoretical
Speculations,” ibid., 359-362, 401-406; n.s. 9 (1831),
111-117, 188-197, 258-270.
(8) Conybeare, “Inquiry How Far the Theory of M. Élie
de Beaumont Concerning the Parallelism of the Lines of
Elevation of the Same Geological Area, Is Agreeable to
the Phaenomena as Exhibited in Great Britain,” in Philosophical
Magazine and Journal of Science,1 (1832),
118-126; 4 (1834), 404-414.
(9) Conybeare, “Report on the Progress, Actual State
and Ulterior Prospects of Geological Science,” in Report
of the British Association for the Advancement of Science,
1831-2 (1833), pp. 365-414.
(10) M. J. S. Rudwick, “A Critique of Uniformitarian
Geology: A Letter From W. D. Conybeare to Charles Lyell,
1841,” in Proceedings of the American Philosophical Society,111 (1967), 272-287.
In addition, see F. J. North, “Dean Conybeare, Geologist,”
in Transactions of the Cardiff Naturalists' Society,66