Earth Sculpture Or the Origin of Land Forms
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In other places the deformations belong to relatively recent times. Again, we find evidence to show that certain areas have experienced such changes at many successive periods. As might have been expected, the oldest rock-folds have suffered excessive erosion, while the youngest have experienced less. We are thus able to study in different countries the successive phases through which a region of highly 92 LAND-FORMS IN HIGHLY FOLDED STRATA 93 disturbed strata must necessarily pass. We see it i...n its youth in such mountains as the Alps, the Hima- layas, the Cordilleras, and in its old age in the Appalachians and the mountains of Scandinavia and Britain.
Let us now briefly consider some of the typical kinds of structure presented by the more steeply in- clined strata. In regions of moderately inclined rocks the folds, as we have seen, are symmetrical anticlines and synclines. The axes of which are vertical, the beds FIG. 27. ISOCLINAL FOLDS.
Axes moderately inclined from the vertical.
dipping away from or towards the axes at approxi- mately equal angles.
What to read after Earth Sculpture Or the Origin of Land Forms?
You can find similar books in the "Read Also" column, or choose other free books by Geikie, James, 1839-1915 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In other places the deformations belong to relatively recent times. Again, we find evidence to show that certain areas have experienced such changes at many successive periods. As might have been expected, the oldest rock-folds have suffered excessive erosion, while the youngest have experienced less. We are thus able to study in different countries the successive phases through which a region of highly 92 LAND-FORMS IN HIGHLY FOLDED STRATA 93 disturbed strata must necessarily pass. We see it i...n its youth in such mountains as the Alps, the Hima- layas, the Cordilleras, and in its old age in the Appalachians and the mountains of Scandinavia and Britain.
Let us now briefly consider some of the typical kinds of structure presented by the more steeply in- clined strata. In regions of moderately inclined rocks the folds, as we have seen, are symmetrical anticlines and synclines. The axes of which are vertical, the beds FIG. 27. ISOCLINAL FOLDS.
Axes moderately inclined from the vertical.
dipping away from or towards the axes at approxi- mately equal angles.
What to read after Earth Sculpture Or the Origin of Land Forms?
You can find similar books in the "Read Also" column, or choose other free books by Geikie, James, 1839-1915 to read onlineMoreLess
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