Drift Sheets Research Articles

The Differentiation of the Drift Sheets of Northwestern Illinois

Next article FreeThe Differentiation of the Drift Sheets of Northwestern IllinoisMorris M. LeightonMorris M. Leighton Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by The Journal of Geology Volume 31, Number 4May - Jun., 1923 Article DOIhttps://doi.org/10.1086/623020 Views: 42Total views on this site Citations: 6Citations are reported from Crossref PDF download Crossref reports the following articles citing this article:K.W.G. Valentine, J.B. Dalrymple Quaternary Buried Paleosols: A Critical Review, Quaternary Research 6, no.22 (Jan 2017): 209–222.https://doi.org/10.1016/0033-5894(76)90051-X Morris M. Leighton The Iowan Glacial Drift Sheets of Iowa and Illinois, The Journal of Geology 76, no.33 (Sep 2015): 259–279.https://doi.org/10.1086/627328 Morris M. Leighton The Stratigraphic Succession of Wisconsin Loesses in the Upper Mississippi River Valley, The Journal of Geology 73, no.22 (Oct 2015): 323–345.https://doi.org/10.1086/627064 Morris M. Leighton , and John A. Brophy Illinoian Glaciation in Illinois, The Journal of Geology 69, no.11 (Sep 2015): 1–31.https://doi.org/10.1086/626713 Morris M. Leighton Important Elements in the Classification of the Wisconsin Glacial Stage, The Journal of Geology 66, no.33 (Sep 2015): 288–309.https://doi.org/10.1086/626506 Richard Foster Flint Leaching of Carbonates in Glacial Drift and Loess as a Basis for Age Correlation, The Journal of Geology 57, no.33 (Sep 2015): 297–303.https://doi.org/10.1086/625610

The Interglacial Gorges of Six Mile Creek at Ithaca, New York

The question of the complexity of the glacial period in central New York is still largely unsettled. It is conceded probably by all that the region has suffered more than a single ice invasion, but how many such invasions there were and how far the different invasions were separated from each other in time are problems as yet only partially solved. The criteria for the identification of distinct glacial epochs which can be applied in a hilly region well within the southern limits of the ice, and even within the zone of active erosion by the latest Wisconsin ice sheet, are necessarily different from those which have been used so extensively and so successfully in the Mississippi Valley. Under the conditions prevailing in central New York one could not expect, for instance, to find drift sheets imbricated in the same manner as on the plains of the Mississippi near the limit of glaciation where the erosive power of the ice was doubtless slight and undirected and where deposition was the rule. Nor would it be possible to apply the common test of the relative erosion suffered by drift sheets of different ages, for, since the region in question lies within the great moraines of the Late Wisconsin epoch, any erosional features developed on earlier drift sheets would have been modified or destroyed by the Wisconsin ice. The hilly nature of the country, too, would tend to prevent the accumulation of till in even, continuous sheets and would lead to an irregular, patchy distribution of any remnants of earlier drift deposits. The meagerness, in this region, of the evidences from glacial deposits indicating multiple glaciation may be judged from the fact that, so far as the writer has been able to discover, only one investigator, Carney,' has

Concerning Certain Criteria for Discrimination of the Age of Glacial Drift Sheets as Modified by Topographic Situation and Drainage Relations

Previous articleNext article FreeConcerning Certain Criteria for Discrimination of the Age of Glacial Drift Sheets as Modified by Topographic Situation and Drainage RelationsWilliam C. AldenWilliam C. Alden Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by The Journal of Geology Volume 17, Number 8Nov. - Dec., 1909 Article DOIhttps://doi.org/10.1086/621677 Views: 24Total views on this site Citations: 1Citations are reported from Crossref Copyright 1909 The University of ChicagoPDF download Crossref reports the following articles citing this article:Yvette Veyret Essai sur la terminologie glaciaire, Géographie physique et Quaternaire 33, no.22 (Dec 2010): 205–222.https://doi.org/10.7202/1000069ar

Aftonian mammalian fauna

Stratigraphic Position of the Aftonian Deposits Between the two older drift sheets of Iowa, known respectively as the pre-Kansan and the Kansan, there are many evidences of a long interval of mild climate. Such an interval is indicated by intercalated weathered zones, soil bands, peat beds, buried forests, and aqueous deposits of sand and gravel. Chamberlin pointed out the interglacial position of the extensive gravel beds at Afton Junction and Thayer and gave the name Aftonian 2 to the interval which they in part represent. The writer, discussing the age of these gravels in the Proceedings of the Davenport Academy of Sciences, was led to conclude that they are the work of streams which had their origin in the rapid melting of the pre-ICansan ice, and that they belong in reality to the closing phase of the pre-Kansan glaciation. 3 In rapidly disappearing glaciers there was offered a reasonable explanation of . . .

The Aftonian Gravels and Their Relations to the Drift Sheets in the Region about Afton Junction and Thayer. Samuel Calvin

<i>The Aftonian Gravels and Their Relations to the Drift Sheets in the Region about Afton Junction and Thayer</i>. Samuel Calvin

Relations of the Wisconsin and Kansan Drift Sheets in Central Iowa, and Related Phenomena

Relations of the Wisconsin and Kansan Drift Sheets in Central Iowa, and Related Phenomena