. Biological series. Biology. Tributaries of the Laurentian River 11 Since four of the present Great Lakes have depths reach-, ing below sea-Icvel, and three of them are included in the supposed ancienc ri\er channel, one must suppose that an important amount of differential warping of the earth's crust has occurred since these basins and their drift-filled connections supplied a continuous grade from the interior highlands to the sea. There are difnculties in accounting for these anomalies, but no better theory has thus far been 3. Map of the Laurentian River Tributaries of the La
. Biological series. Biology. Tributaries of the Laurentian River 11 Since four of the present Great Lakes have depths reach-, ing below sea-Icvel, and three of them are included in the supposed ancienc ri\er channel, one must suppose that an important amount of differential warping of the earth's crust has occurred since these basins and their drift-filled connections supplied a continuous grade from the interior highlands to the sea. There are difnculties in accounting for these anomalies, but no better theory has thus far been 3. Map of the Laurentian River Tributaries of the Laurentian River If we assume that the Laurentian river existed, and that it threaded several now distinct basins, it is evident that there must have been numerous tributaries joining it. Spencer has indicated several of them on his map, the first being the Huronian river, formed of two branches, one coming from the depression of Saginaw bay, and the other running north from the southern portion of Lake Huron. In the Ontario basin he maps two tributaries, the small. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original University of Toronto; Toronto, Ont. University. University of Toronto studies. Biological series. Toronto University Press [etc. ]
Size: 1930px × 1295px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectbiology, bookyear1898
