The Delavan Lobe of the Lake Michigan Glacier of the Wisconsin Stage of Glaciation and Associated PhenomenaUniversity of Chicago., 1904 - 106 Seiten |
Häufige Begriffe und Wortgruppen
Archean Archean crystalline rocks basin bordering bowlders Burlington Chamberlin Chert and quartz clay crest Darien moraine Delavan glacial lobe Delavan lobe drift sheets elevation Elkhorn moraine erosion foreign material Fox River Galena Galena limestone Genoa Genoa Junction Genoa moraine GEOLOGICAL SURVEY glacial waters Green Bay Glacier Huronian Huronian quartzite ice front Illinois interlobate Kettle moraine Janesville Johnstown moraine Kenosha County kettle holes Kettle moraine Lake Chicago Lake Geneva Lake Koshkonong Lake Michigan Glacier Leverett Lower Magnesian limestone Marengo Ridge margin Milton moraine Milwaukee morainal belt morainal deposits Niagara limestone Number of analysis older drift outwash deposits Percentage of foreign Peter and Potsdam Potsdam sandstone quartzite Racine County retreat Rock County Rock River sand and gravel shown on Pl slope southeastern Wisconsin southward stage of glaciation Sugar Creek Valley surface terminal moraine terrace topography tract Trenton limestone Troy Valley Turtle Creek outlet vicinity Walworth County Waukesha County Whitewater Wisconsin glaciers
Beliebte Passagen
Seite 29 - ... the State and combined to mold the surface features of a large area, including Waukesha County. The direction of the main body of the Green Bay Glacier was to the southwest, though the portion reaching, into Waukesha, Jefferson, and Walworth Counties had a direction varying from south to southeast. The Lake Michigan Glacier advanced southward along the lake basin, and on the west developed laterally what is called the Delavan Lobe. Where the Green Bay Glacier came into contact with the Delavan...
Seite 7 - Very respectfully, CW HAYES, Geologist in Charge of Geology. Hon. CHARLES D. WALCOTT, Director United States Geological Survey.
Seite 11 - Dawaon. 2. First interval of deglaciation, Aftonian of Chamberlin. 3. Kansan drift sheet of the Iowa geologists. 4. Second or Yarmouth interval of recession or deglaciation. 5. Illinoian drift sheet. 6. Third or Sangamon interval of recession or deglaciation. 7. lowan drift sheet and main loess deposit. » Leverett, Frank, The glacial formations and drainage features of the Erie and Ohio basins: Mon. I".
Seite 66 - The notable feature of the tract is the disposition of the drift in broad ridges parallel to the lake shore, so that, though the general elevation decreases toward the east, the drainage reaches the lake only where the streams have cut transversely across the trend of the ridges, as in the case of Root and Pike rivers. One of the streams, Desplaines River, in fact does not enter the lake, but flows southward to Illinois Kiver.
Seite 73 - ... county, one should not lose sight of the large amount of evidence of the presence of a post-Kansan drift in the area as a whole north and west of these uncertain limits. APPENDIX A Tables Showing Lithologic Composition of Drift. In making analyses one hundred to seven hundred pebbles were collected from the drift at each of the places indicated. These were sorted and the percentages taken. These include numerous estimates made in 1907 by RT Chamberlin. Excepting the analyses by Mr. Chamberlin,...
Seite 68 - ... the adjacent drift hills, another hundred feet would be needed to complete the dam. Just what has been the warping of the basin to produce this contortion of the rim, I am not prepared to say, but the * This outlet is described by Dr. E. Andrews in his recent paper on "The North American Lakes considered as chronometers of post-glacial time
Seite 12 - ... Rock, and Dane counties, an area somewhat greater than 2,000 square miles. It includes also a small portion of northeastern Illinois adjacent to the State line. In this area are developed certain glacial phenomena which throw some light on the relations existing between the glaciers of Illinois and Wisconsin during the earlier and later advances of the Wisconsin stage of glaciation. The special feature of this discussion is the Delavan lobe of the Lake Michigan Glacier, which thrust itself out...
Seite 52 - Darien moraine transversely across whatever filling of older drift there may have been in Troy Valley, across the supposed northward extension of the Marengo Ridge and the intervening trough, and was melted back to the Elkhorn moraine without entirely obliterating the earlier drift features. The damming of the valley by the deposition of the Darien moraine inclosed the basin. As in the case of Lake Geneva, a long finger of ice probabh, continued in the basin after the ice had disappeared from the...