 ... 2d. Some of the valleys and channels which bear the marks of glacial action — evidently formed or modified by ice, and dating from the ice period or an earlier epoch — are excavated far below the present lakes and water-courses which occupy them....  The American Naturalist - Page 1961871Full view - About this book
 | Sir Norman Lockyer - 1870 - 596 lehte
...action, evidently formed or modified by ice, and dating from the ice period of an earlier epoch, are excavated far below the present lakes and watercourses...without a continental elevation of several hundred feet. Upon the glacial surface are found a series of unconsolidated materials, generally stratified, called... | |
 | Sir Norman Lockyer - 1870 - 548 lehte
...action, evidently formed or modified by ice, and dating from the ice period of an earlier epoch, are excavated far below the present lakes and watercourses...without a continental elevation of several hundred feet. Upon the glacial surface are found a series of unconsolidated materials, generally stratified, called... | |
 | Henry Woodward - 1870 - 684 lehte
...evidently formed or modified by ice, and dating from the- Glacial period or an earlier epoch — are excavated far below the present lakes and water-courses...drainage, at a lower level than the present river system. Lakes Michigan, Huron, Erie, and Ontario, are basins excavated in undisturbed sedimentary rocks. An... | |
 | Geological Survey of Ohio, John Strong Newberry - 1870 - 194 lehte
...level than the present river system—lower, in many places, than the surface of the ocean—and hence lower than could be produced without a continental...few examples will suffice to show on what evidence these statements are based. Lake Michigan, Lake Huron, Lake Erie and Lake Ontario are basins excavated... | |
 | 1870 - 178 lehte
...generally been modified, if not produced by ice, and date from the Ice period, or an earlier epoch. These valleys form a connected system of drainage at a lower level than the present river system — lower, in many places, than the surface of the ocean — and hence lower than could be produced... | |
 | Sir Norman Lockyer - 1870 - 652 lehte
...action, evidently formed or modified by ice, and dating from the ice period of an earlier epoch, are excavated far below the present lakes and watercourses which occupy them. These vallcjs form a connected system of drainage at a lower level than the present river system, and lower... | |
 | 1871 - 1016 lehte
...— evidently formed or modified by ice, and dating from the ice period or an earlier epoch — are excavated far below the present lakes and water-courses...on the action of glaciers on rock surfaces In the Alp' and in Oregon and Washington Territory, I do not hesitate to assert that no other age-it could... | |
 | 1871 - 806 lehte
...— evidently formed or modified by ice, and dating from the ice period or an earlier epoch — are excavated far below the present lakes and water-courses...•From my own observations on the action of glaciers on rook surfaces in the Alps and in Oregon and Washington Territory, I do not hesitate to assert that... | |
 | 1871 - 372 lehte
...briefly as follows: — "2d. Some of the valleys and channels which bear the mark of glacial action are excavated far below the present lakes and water-courses...a continental elevation of several hundred feet." As examples of this Dr. Ncwberry cites among others the following: An old excavated, now-filled channel,... | |
 | 1871 - 372 lehte
...lines of drainage. " 2d. Some of the valleys and channels which bear the mark of glacial notion are excavated far below the present lakes and water-courses...a continental elevation of several hundred feet." As examples of this Dr. Ne wherry cites among others the following: An old excavated, now-filled channel,... | |
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