 | American Association for the Advancement of Science - 1883 - 1358 pages
...Upper Silurian rocks were deposited in the state of New York. When subsidence Lad brought the Niagara below the ocean again, the deposition of the rocks under consideration took place, filling the interstices in the eroded Niagara group. Being thus protected by the older and harder Niagara rocks,... | |
 | American Association for the Advancement of Science - Science - 1884 - 642 pages
...Upper Silurian rocks were deposited in the state of New York. When subsidence had brought the Niagara below the ocean again, the deposition of the rocks under consideration took place, filling the interstices in the eroded Niagara group. Being thus protected by the older and harder Niagara rocks,... | |
 | 1884 - 620 pages
...Upper Silurian rocks were deposited in the state of New York. When subsidence had brought the Niagara below the ocean again, the deposition of the rocks under consideration took place, filling the interstices in the eroded Niagara group. Being thus protected by the older and harder Niagara rocks,... | |
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below the ocean again, the deposition of the rocks under consideration took place, filling the 