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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Flood geology | 3/12 | https://en.wikipedia.org/wiki/Flood_geology | reference | science, encyclopedia | 2026-05-05T09:19:57.530514+00:00 | kb-cron |
"Although the Mosaic account of the creation of the world is an inspired writing, and consequently rests on evidence wholly independent of human observation and experience, still it is interesting, and in many respects important, to know that it coincides with the various phenomena observable in the mineral kingdom." This sentence was removed after the second edition, and Jameson's position changed as shown by his notes in successive editions, but it influenced British views of Cuvier's concept. In 1819, George Bellas Greenough, first president of The Geological Society, issued A Critical Examination of the First Principles of Geology stating that unless erratic boulders deposited hundreds of miles from their original sources had been moved by seas, rivers, or collapsing lakes, "the only remaining cause, to which these effects can be ascribed, is a Debacle or Deluge."
==== Buckland and the English school of geologists ==== Conservative geologists in Britain welcomed Cuvier's theory to replace Werner's Neptunism, and the Church of England clergyman William Buckland became the foremost proponent of flood geology as he sought to get the new science of geology accepted on the curriculum of the University of Oxford. In 1818, he was visited by Cuvier, and in his inaugural speech in 1819 as the first professor of geology at the university he defended the subject against allegations that it undermined religion. His speech, published as Vindiciae Geologicae; or, The Connexion of Geology with Religion Explained, equated the last of a long series of catastrophes with the Genesis flood, and said that "the grand fact of an universal deluge at no very remote period is proved on grounds so decisive and incontrovertible, that, had we never heard of such an event from Scripture, or any other, authority, Geology of itself must have called in the assistance of some such catastrophe, to explain the phenomena of diluvian action which are universally presented to us, and which are unintelligible without recourse to a deluge exerting its ravages at a period not more ancient than that announced in the Book of Genesis." The evidence he proposed included erratic boulders, extensive areas of gravel, and landforms which appeared to have been scoured by water. This inaugural address influenced the geologists William Conybeare and William Phillips. In their 1822 book on Outlines of the Geology of England and Wales Conybeare referred to the same features in an introduction about the relationship between geology and religion, describing how a deluge causing "the last great geological change to which the surface of our planet appears to have been exposed" left behind the debris (which he named in Latin Diluvium) as evidence for "that great and universal catastrophe to which it seems most properly assignable". In 1823 Buckland published his detailed account of "Relics of the Flood", Reliquiae Diluvianae; or, Observations on the Organic Remains Contained in Caves, Fissures, and Diluvial Gravel and on Other Geological Phenomena Attesting the Action of an Universal Deluge, incorporating his research suggesting that animal fossils had been dragged into the Kirkdale Cave by hyenas then covered by a layer of red mud washed in by the deluge. Buckland's views were supported by other Church of England clergymen naturalists: his Oxford colleague Charles Daubeny proposed in 1820 that the volcanoes of the Auvergne showed a sequence of lava flows from before and after the flood had cut valleys through the region. In an 1823 article "On the deluge", John Stevens Henslow, professor of mineralogy at the University of Cambridge, affirmed the concept and proposed that the flood had originated from a comet, but this was his only comment on the topic. Adam Sedgwick, Woodwardian Professor of Geology at Cambridge, presented two supportive papers in 1825, "On the origin of alluvial and diluvial deposits", and "On diluvial formations". At this time, most of what Sedgwick called "The English school of geologists" distinguished superficial deposits which were "diluvial", showing "great irregular masses of sand, loam, and coarse gravel, containing through its mass rounded blocks sometimes of enormous magnitude" and supposedly caused by "some great irregular inundation", from "alluvial" deposits of "comminuted gravel, silt, loam, and other materials" attributed to lesser events, the "propelling force" of rivers, or "successive partial inundations". In America, Benjamin Silliman at Yale College spread the concept and in an 1833 essay dismissed the earlier idea that most stratified rocks had been formed in the flood, while arguing that surface features showed "wreck and ruin" attributable to "mighty floods and rushing torrents of water". He said that "we must charge to moving waters the undulating appearance of stratified sand and gravel, often observed in many places, and very conspicuously in the plain of New Haven, and in other regions of Connecticut and New England", while both "bowlder stones" and sandy deserts across the world could be attributed to "diluvial agency".
==== Criticisms and retractions: the downfall of diluvialism ==== Other naturalists were critical of diluvialism: Church of Scotland minister John Fleming published opposing arguments in a series of articles from 1823 onwards. He was critical of the assumption that fossils resembling modern tropical species had been swept north "by some violent means", which he regarded as absurd considering the "unbroken state" of fossil remains. For example, fossil mammoths demonstrated adaptation to the same northern climates now prevalent where they were found. He criticized Buckland's identification of red mud in the Kirkdale cave as diluvial, when nearly identical mud in other caves had been described as fluvial. While Cuvier had reconciled geology with a loose reading of the biblical text, Fleming argued that such a union was "indiscreet" and turned to a more literal view of Genesis: