534 HISTORY OF PASADENA. 



mammoth, or whether it migrated south with the llama, we may never 

 know." 



How long ago did these things occur? 



The same authority above quoted, and which is the latest presentation 

 of facts and opinions commonly accepted in the scientific world with regard 

 to these matters, sets forth conclusions from which I quote a few brief pas- 

 '^ages bearing upon the time problem. On page 313 [" Man and the Glacial 

 Period ' '] the author says : 



" It is certainly not more than ten or fifteen thousand years ago that 

 the ice finally melted off the L,aurentian highlands ; while on the Pacific 

 coast the period of glaciation was still more recent." 



Again, on page 363, he says : 



" The climax of the Glacial period represented a condition of things 

 slowly attained by the changes of level which took place during the latter 

 part of the Tertiary epoch. It is the theory of Mr. Prestwich and others 

 that all the phenomena of the Glacial period can be brought within the 

 limits of thirty or forty thousand years."* 



And again, page 364: "One hundred thousand years, therefore, or 

 even less, might easily include both the slow coming on of the Glacial 

 period and its rapid close. * * After making all reasonable allowances, 

 therefore, Prestwich's conclusion that 25,000 years is ample time to allow 

 to the reign of the ice of the Glacial period cannot be regarded as by any 

 means incredible. ' ' 



And yet again, on page 321, speaking of the volcanic eruptions, which 

 in the north and middle part of the state covered remains of man in the 

 glacial gravels of Table Mountain, he says : 



"These volcanic eruptions are mostly of late date, beginning in the 

 middle of the Tertiary, and culminating probably about the time of the 

 maximum extent of the Laurentide glacier." 



Another eminent authority in this branch of Science is Prof. Warren 

 Upham, who read a paper before the Geological Society of America, in De- 

 cember, 1893 [See American Naturalist ior March, 1894, page264], in which 

 he says : 



"The Glacial period, regarded as continuous, without inter-glacial 

 epochs attending the culmination of the uplift, but terminating after the 

 subsidence of the glaciated region, 20,000 to 30,000 years ; and the post- 

 glacial or recent period, extending to the present time, 6,000 to 10,000 years. 

 In total the Pleistocene era in North America, therefore, has comprised 

 probably about 100,000 or 150,000 years, its latest third or fourth part being 

 the Ice Age and subsequent time."t ' 



*■• "All the evidence tends to prove that late Glacial, or post-glacial man. together with the extinct 

 mammalia, came down approximately to within some 10,000 or 12.000 years of our own times." — Prof. Jos- 

 eph Pyeilwich, F. R. S , F.nsland. See American Naturalist. February. 1894, p. 162. 



" From this wide range of concurrent but independent tesLimonies, we may accept it as practically 

 demonstrated that the ice sheets disappeared Ironi North America and Europe some six to ten thousand 

 years ago." — Piof. IVarren Upliain, in Popular Science Monthly, December, 1893, p. 161. 



t" It would better accord with truth to =ay that sixty thousand years ago the Glacial period was 

 miking ready to go out of business." After making c rtain (urther explanations, he add-; — "The close 

 of the Glacial period was oaly thirty thousand years ago." — R. IV. McFarland, in Popular Science 

 Momlhly of April, 1894, page 841. 



