Forest physiography; physiography of the United States and principles of soils in relation to forestry . Fig. i88. — Isobasic map of the Algonkian aad Iroquois beaches, showing the broader features ofwarping. Numbers indicate elevations of raised beaches above the sea. (Goldthwait.) .^0-DSOJf ? .^-. ^.-7- i: Fig. 189. — Map of e.\tinct Lake Agassiz and other glacial lakes. (UphamU. S. Geol. Surv.) PRAIRIE PLAINS 485 contrast to these features of shore lines of subsidence are the featuresindicating elevation on the shore lines of the eastern side of Lake Huronat Kincardine and Goderich, Ontario
Forest physiography; physiography of the United States and principles of soils in relation to forestry . Fig. i88. — Isobasic map of the Algonkian aad Iroquois beaches, showing the broader features ofwarping. Numbers indicate elevations of raised beaches above the sea. (Goldthwait.) .^0-DSOJf ? .^-. ^.-7- i: Fig. 189. — Map of e.\tinct Lake Agassiz and other glacial lakes. (UphamU. S. Geol. Surv.) PRAIRIE PLAINS 485 contrast to these features of shore lines of subsidence are the featuresindicating elevation on the shore lines of the eastern side of Lake Huronat Kincardine and Goderich, Ontario, where the rising land keeps thelake always at work on new levels, and till, bowlders, cobblestones, are everywhere in evidence. The near-shore bottom is stonyand the stream discharging into Lake Huron at Kincardine has a stonybed, caving banks, and impetuous How, indicating uplift and constantlyrenewed energies.^ If the tilting continues at the present rate, the waterof Lake Michigan will ultimately discharge across the low divide thatseparates the lake from the Desplaines Valley. Its channel will then bereoccupied and Niagara will become dry. It has been calculated thatthis change would take place naturally in from 5000 to 10,000 years; butman has anticipated the change by c
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
