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Home > Dictionary of Science Quotations > Scientist Names Index J > John Joly Quotes

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John Joly
(1 Nov 1857 - 8 Dec 1933)

Irish geologist and physicist whose interests spanned several fields including geochronology and radioactivity. He estimated the age of the Earth at 100 million years.


Science Quotes by John Joly (5 quotes)

It is ... indisputable that the orogenic movements which uplift the hills have been at the basis of geological history. To them the great accumulation of sediments which now form so large a part of continental land are mainly due. There can be no doubt of the fact that these movements have swayed the entire history, both inorganic and organic, of the world in which we live.
— John Joly
Radioactivity and Geology (1909), 115-6.
Science quotes on:  |  Accumulation (50)  |  Basis (173)  |  Both (494)  |  Doubt (305)  |  Due (141)  |  Fact (1212)  |  Form (960)  |  Geology (220)  |  Great (1575)  |  History (675)  |  Large (394)  |  Live (629)  |  Mountain (187)  |  Movement (155)  |  Organic (158)  |  Sediment (8)  |  Uplift (6)  |  World (1778)

Modern Science has along with the theory that the Earth dated its beginning with the advent of man, swept utterly away this beautiful imagining. We can, indeed, find no beginning of the world. We trace back events and come to barriers which close our vistabarriers which, for all we know, may for ever close it. They stand like the gates of ivory and of horn; portals from which only dreams proceed; and Science cannot as yet say of this or that dream if it proceeds from the gate of horn or from that of ivory.
In short, of the Earth's origin we have no certain knowledge; nor can we assign any date to it. Possibly its formation was an event so gradual that the beginning was spread over immense periods. We can only trace the history back to certain events which may with considerable certainty be regarded as ushering in our geological era.
— John Joly
Lecture at the Royal Dublin Society, 6 Feb 1914. Published in Science Progress, Vol. 9, 37. Republished in The Birth-Time of the World and Other Scientific Essays, (1915), 2.
Science quotes on:  |  All (4107)  |  Back (391)  |  Barrier (32)  |  Beautiful (259)  |  Beginning (305)  |  Certain (550)  |  Certainty (174)  |  Considerable (75)  |  Dream (209)  |  Earth (998)  |  Era (51)  |  Event (216)  |  Find (999)  |  Formation (96)  |  Gate (32)  |  History (675)  |  Horn (18)  |  Immense (86)  |  Indeed (323)  |  Know (1519)  |  Knowledge (1536)  |  Man (2249)  |  Modern (385)  |  Modern Science (52)  |  Origin (241)  |  Period (198)  |  Portal (7)  |  Possibly (111)  |  Proceed (129)  |  Regard (304)  |  Say (984)  |  Science (3880)  |  Short (197)  |  Spread (83)  |  Stand (274)  |  Theory (972)  |  Trace (104)  |  World (1778)

Only mountains can beget mountains.
— John Joly
The Birth-Time of the World (1915), 141.
Science quotes on:  |  Mountain (187)

The sediments of the past are many miles in collective thickness: yet the feeble silt of the rivers built them all from base to summit.
— John Joly
Lecture at the Royal Dublin Society, 6 Feb 1914. Published in Science Progress, Vol. 9, 37. Republished in The Birth-Time of the World and Other Scientific Essays, (1915), 4.
Science quotes on:  |  All (4107)  |  Base (117)  |  Past (337)  |  River (121)  |  Sediment (8)  |  Strata (35)  |  Summit (26)

With an interest almost amounting to anxiety, geologists will watch the development of researches which may result in timing the strata and the phases of evolutionary advance; and may even-going still further back—give us reason to see in the discrepancy between denudative and radioactive methods, glimpses of past aeons, beyond that day of regeneration which at once ushered in our era of life, and, for all that went before, was 'a sleep and a forgetting'.
— John Joly
Radioactivity and Geology (1909), 250-1.
Science quotes on:  |  Advance (280)  |  All (4107)  |  Anxiety (30)  |  Back (391)  |  Beyond (308)  |  Development (424)  |  Discrepancy (7)  |  Era (51)  |  Geologist (75)  |  Interest (386)  |  Life (1799)  |  Method (506)  |  Methods (204)  |  Origin Of Earth (9)  |  Past (337)  |  Phase (36)  |  Radioactive (22)  |  Radioactivity (30)  |  Reason (744)  |  Regeneration (5)  |  Result (678)  |  See (1082)  |  Sleep (76)  |  Still (613)  |  Strata (35)  |  Watch (109)  |  Will (2354)


See also:
  • 1 Nov - short biography, births, deaths and events on date of Joly's birth.
  • Radioactivity and Geology: ...Terrestrial History, by John Joly. - book suggestion.

Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
Quotations by: • Albert Einstein • Isaac Newton • Lord Kelvin • Charles Darwin • Srinivasa Ramanujan • Carl Sagan • Florence Nightingale • Thomas Edison • Aristotle • Marie Curie • Benjamin Franklin • Winston Churchill • Galileo Galilei • Sigmund Freud • Robert Bunsen • Louis Pasteur • Theodore Roosevelt • Abraham Lincoln • Ronald Reagan • Leonardo DaVinci • Michio Kaku • Karl Popper • Johann Goethe • Robert Oppenheimer • Charles Kettering  ... (more people)

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- 30 -
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