84: Charles Schuchert — Historical Geology, 1818-1918. 



His first printed paleogeographic map appeared in 1833, 

 and was of early Tertiary time. Other maps by Beau- 

 mont were published by Beudant in 1841-1842. The 

 Sicilian geologist Gemmellaro published six maps of his 

 country in 1834, and the Englishman De La Beche had 

 one in the same year. In America the first to show such 

 maps was Arnold Guyot in his Lowell lectures of 1848, 

 James D. Dana published three in the 1863 edition of his 

 Manual of Geology. Of world paleogeographic maps, 

 Jules Marcou produced the first of Jurassic time, pub- 

 lishing it in France in 1866, but the most celebrated of 

 these early attempts was the one by Neumayr published 

 in 1883 in connection with his Ueber klimatische Zonen 

 wahrend der Jura- und Kreidezeit. 



The first geologist to produce a series of maps showing 

 the progressive geologic geography of a given area was 

 Jukes-Brown, who in the volume entitled "The Building 

 of the British Isles," 1888, included fifteen such maps. 

 Karpinsky published fourteen maps of Russia, and in 

 1896 Canu in his Essai de paleogeographie has fifty-seven 

 of France and Belgium. Lapparent's Traite of 1906 is 

 famous for paleogeographic maps, for he has twenty- 

 three of the world, thirty-four of Europe, twenty-five of 

 France, and ten taken from other authors. Schuchert in 

 1910 published fifty-two to illustrate the paleogeography 

 of North America, and also gave an extended list of such 

 published maps. Another article on the subject is by Th. 

 Arldt, "Zur Geschichte der Palaogeographischen Rekon- 

 structionen, ' ' published in 1914. Edgar Dacque in 1913 

 also produced a list in his Palaogeographischen Karten, 

 and two years later appeared his book of 500 pages, 

 Grundlagen und Methoden der Palaogeographie, where 

 the entire subject is taken up in detail. 



Conclusions. — Since 1833 there have been published 

 not less than 500 different paleogeographic maps, and of 

 this number about 210 relate to North America. Never- 

 theless paleogeography is still in its infancy, and most 

 maps embrace too much geologic time, all of them tens 

 of thousands, and some of them millions of years. The 

 geographic maps of the present show the conditions of 

 the strand-lines of to-day, and those made fifty years ago 

 have to be revised again and again if they are to be of 

 value to the mariner and merchant. Therefore in our 

 future paleogeographic maps the tendency must ever be 



