016

• Format: Text
• Language: unknown
• Published: State Historical Society of North Dakota
• Subjects: Ice Sheet
• Online Access: http://cdm16921.contentdm.oclc.org/cdm/ref/collection/ndsl-books/id/55466

qEQLOGY. OF THE HILL CP.yNTJSX 15 As early as the decade of the sixties a few geologists both in this country and Europe maintained that there were evidences that Indicated two Glacial periods with an interglacial stage between them. This view was quite' generally rejected, especially by those whose ideas led them to favor iceberg and subsidence theories. Put facts are stubborn things and facts were accumulating. Such an array of them had accumulated that about 1890 iceberg and submergence views virtually collapsed. Various state geologists continued to add data to what (lad previously been gathered, but more important still has been the work of the Glacial Division of the U. S. Geological Survey, which has created an extensive literature. A literature of kindred character, combined with prehistoric archaeology, b.as likewise been developed in Europe.* The following stages of the Glacial Period have been worked out by the members of the U S. Geological Survey: Albertan—This ice-sheet is believed to have advanced as far south as southern Iowa. It is thought t» have retreated northward to central Minnesota and then again advanced south, this second southward movement beginning the Kansan stage.' * European anthropologists liave now got the science of Prehistoric Man so well in hand that when any new discovery in made they can assign it to the state where U chronologically helonga. Tne Paleolithic age of mnn in Europe stretches from the hr«t in- tenrhicial epoch to the Fourth Glacial period, and eomprinessuch divisions lis those: OhelU'Mi—Acheulenii—J'onsti rinn— (there before the end of the Pecond Glacial i>eriod): Bolntrlan—Anrlgnn- cian—Magdnleiiiiui, Asyiian, and AriMim, the last stage only represented in southern France In the Fourth (nnd hint European) Glacial period. Presumed longgiipin Furopens to thepreocneeof Man, hut followed later about all over Europe by Neolithic Man,' and later by the lironze Age, which preceded the Historic period, two noted skulls found in Europe ill 1831 and 1857, respectively —the Engis and Neanderthal—were so much discussed that all readers of popularized Science must hnve met with some mention of them. Their order of age can now he fixed in the scale by the aid of later discoveries. The Neanderthal skull was Mousterian; the Engis skull Magdalenian, or of the third interracial epoch. ' Scanned with a Zeutschel Zeta book scanner at 300 dpi. Edited in Multi-page TIFF Editor.