The Making of the Earth
The Making of the Earth
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In our eReader you can find the full English version of the book. Read The Making of the Earth Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Making of the Earth
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, New Series, vol. I, 1879, p. 426.
THE UPLIFT OF THE LAND 101 In addition to movements due to adjacent areas being in this "isostatic balance" there are uplifts and subsidences due to changes within the crust. The inflow of plutonic material beneath an area will cause an uplift, while the contraction of the central mass of the earth causes the sagging downward of the weaker parts of the crust.
FIG. 8. Normal Faults. FF, Trough Faults. H, Horst. Fs, Step Faults.
The problem of isostasy the theo...ry that each block of the earth's crust is upheld by the weight of adjacent blocks is admittedly one of great difficulty. The truth of this principle was doubted by many geographers in spite of the strength of the geological evidence in its favour; but the investiga- tions by Professor E. O. Hecker on the value of the force of gravity at sea shows that the 102 THE MAKING OF THE EARTH evidence of physical earth measurements is consistent with the isostatic theory.
The uplifted and sunken areas may be separated by movements along fractures known as faults.
What to read after The Making of the Earth?
You can find similar books in the "Read Also" column, or choose other free books by J W John Walter Gregory to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
, New Series, vol. I, 1879, p. 426.
THE UPLIFT OF THE LAND 101 In addition to movements due to adjacent areas being in this "isostatic balance" there are uplifts and subsidences due to changes within the crust. The inflow of plutonic material beneath an area will cause an uplift, while the contraction of the central mass of the earth causes the sagging downward of the weaker parts of the crust.
FIG. 8. Normal Faults. FF, Trough Faults. H, Horst. Fs, Step Faults.
The problem of isostasy the theo...ry that each block of the earth's crust is upheld by the weight of adjacent blocks is admittedly one of great difficulty. The truth of this principle was doubted by many geographers in spite of the strength of the geological evidence in its favour; but the investiga- tions by Professor E. O. Hecker on the value of the force of gravity at sea shows that the 102 THE MAKING OF THE EARTH evidence of physical earth measurements is consistent with the isostatic theory.
The uplifted and sunken areas may be separated by movements along fractures known as faults.
What to read after The Making of the Earth?
You can find similar books in the "Read Also" column, or choose other free books by J W John Walter Gregory to read onlineMoreLess
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