...the coastal plain and along the Mississippi valley, LAFAYETTE FORMATION AND SASKATCHEWAN GRAVELS. 91 where the streams expanded over broad areas with shallow...previously made. During the culmination of the uplift, producing the northern ice-sheet, Chesapeake and Delaware bays were excavated and erosion was in progress...

...coastal plain during the early part of a time of continental elevation. As this elevation increased, the rivers would attain steeper slopes and finally...previously made. During the culmination of the uplift, Chesapeake and Delaware baya were excavated, and erosion was in progress at a far more rapid rate than...

...coastal plain during the early part of a time of continental elevation. As this elevation increased, the rivers would attain steeper slopes and finally...previously made. During the culmination of the uplift, Chesapeake and Delaware bays were excavated, and erosion was in progress at a far more rapid rate than...

...era and inaugurating the Quaternary, seems to me to be found in ascribing these beds to deposition by flooded rivers descending from the Appalachian...previously made. During the culmination of the uplift, producing the northern ice-sheet, Chesapeake and Delaware bays were excavated and erosion was in progress...

...and slackened currents. As the elevation increased, however, the rivers would attain steep slcijies and finally erode much of the deposits which they...made. During the culmination of the uplift, which the reviewer thinks to have produced the northern ice-sheet, Chesapeake and Delaware bays were excavated...

...shallow and slackened currents. As the elevation increased, however, the rivers would attain steep slopes and finally erode much of the deposits which...had previously made. During the culmination of the uplifl, which the reviewer thinks to have produced the northern ice-sheet. Chesapeake and Delaware...

...slackened currents. As the elevation increased, however, the rivers would attain steep slopes and tinally erode much of the deposits which they had previously...made. During the culmination of the uplift, which the reviewer thinks to have produced the northern ice-sheet, Chesapeake and Delaware bays were excavated...

...of the continent needed to give these formerly more powerful currents may have been 4,000 to 6,000 feet, being sufficient, probably, to bring the cold...and erosion was in progress at a far more rapid rate than with the present low altitude of this region. The Lafayette formation seems to me more closely...

...of the continent needed to give these formerly more powerful currents may have been 4,000 to 6,000 feet, being sufficient, probably, to bring the cold...and erosion was in progress at a far more rapid rate than with the present low altitude of this region. The Lafayette formation seems to me more closely...

...Mississippi valley, where the streams expanded отег broad areas with shallow and slackened cúrrente. As the elevation increased, however, the rivers would...much of the deposits which they had previously made. Daring the culmination of the uplift, which the writer believes to have been the chief cause of the...