Changes

60:4.2 This period also [[witnesses]] the end of the [http://en.wikipedia.org/wiki/Continental_drift continental drift] and the building of the modern [[mountains]] of [[Urantia]]. But the [[pressure]] of the continental masses and the thwarted [[momentum]] of their agelong drift are not the exclusive [[influences]] in [http://en.wikipedia.org/wiki/Mountain_building mountain building]. The chief and underlying factor in determining the location of a mountain range is the pre-existent lowland, or trough, which has become filled up with the comparatively lighter deposits of the land [[erosion]] and [[marine]] drifts of the preceding ages. These lighter areas of [[land]] are sometimes 15,000 to 20,000 feet thick; therefore, when the crust is subjected to [[pressure]] from any cause, these lighter areas are the first to crumple up, fold, and rise upward to afford compensatory [[adjustment]] for the contending and [[conflicting]] [[forces]] and pressures at [[work]] in the [http://en.wikipedia.org/wiki/Earth%27s_crust earth's crust] or underneath the crust. Sometimes these upthrusts of [[land]] occur without folding. But in [[connection]] with the rise of the http://en.wikipedia.org/wiki/Rocky_mountains Rocky Mountains], great folding and tilting occurred, coupled with enormous overthrusts of the various layers, both underground and at the [[surface]].

60:4.2 This period also [[witnesses]] the end of the [http://en.wikipedia.org/wiki/Continental_drift continental drift] and the building of the modern [[mountains]] of [[Urantia]]. But the [[pressure]] of the continental masses and the thwarted [[momentum]] of their agelong drift are not the exclusive [[influences]] in [http://en.wikipedia.org/wiki/Mountain_building mountain building]. The chief and underlying factor in determining the location of a mountain range is the pre-existent lowland, or trough, which has become filled up with the comparatively lighter deposits of the land [[erosion]] and [[marine]] drifts of the preceding ages. These lighter areas of [[land]] are sometimes 15,000 to 20,000 feet thick; therefore, when the crust is subjected to [[pressure]] from any cause, these lighter areas are the first to crumple up, fold, and rise upward to afford compensatory [[adjustment]] for the contending and [[conflicting]] [[forces]] and pressures at [[work]] in the [http://en.wikipedia.org/wiki/Earth%27s_crust earth's crust] or underneath the crust. Sometimes these upthrusts of [[land]] occur without folding. But in [[connection]] with the rise of the http://en.wikipedia.org/wiki/Rocky_mountains Rocky Mountains], great folding and tilting occurred, coupled with enormous overthrusts of the various layers, both underground and at the [[surface]].

60:4.3 The oldest mountains of the world are located in [http://en.wikipedia.org/wiki/Category:Mountain_ranges_of_Asia Asia], Greenland, and [http://en.wikipedia.org/wiki/Category:Mountain_ranges_of_Europe northern Europe] among those of the older east-west systems. The mid-age mountains are in the circumpacific group and in the second European east-west system, which was born at about the same time. This gigantic uprising is almost ten thousand miles long, extending from Europe over into the West Indies land elevations. The youngest mountains are in the [http://en.wikipedia.org/wiki/Rocky_Mountains Rocky Mountain system], where, for ages, land elevations had occurred only to be successively covered by the sea, though some of the higher lands remained as islands. Subsequent to the formation of the mid-age mountains, a real mountain highland was elevated which was destined, subsequently, to be carved into the present Rocky Mountains by the combined artistry of nature's elements.

60:4.3 The oldest mountains of the world are located in [http://en.wikipedia.org/wiki/Category:Mountain_ranges_of_Asia Asia], Greenland, and [http://en.wikipedia.org/wiki/Category:Mountain_ranges_of_Europe northern Europe] among those of the older east-west systems. The mid-age mountains are in the circumpacific group and in the second European east-west system, which was born at about the same time. This gigantic uprising is almost ten thousand miles long, extending from Europe over into the West Indies land elevations. The youngest mountains are in the Rocky Mountain system, where, for ages, land elevations had occurred only to be successively covered by the sea, though some of the higher lands remained as islands. Subsequent to the formation of the mid-age mountains, a real mountain highland was elevated which was destined, subsequently, to be carved into the present Rocky Mountains by the combined artistry of nature's elements.

60:4.4 The present [http://en.wikipedia.org/wiki/Rocky_Mountains North American Rocky Mountain region] is not the [[original]] elevation of land; that elevation had been long since leveled by [[erosion]] and then re-elevated. The present front range of mountains is what is left of the remains of the original range which was re-elevated. [http://en.wikipedia.org/wiki/Pike's_Peak Pikes Peak] and [http://en.wikipedia.org/wiki/Long's_Peak Longs Peak] are outstanding examples of this [[mountain]] activity, extending over two or more generations of mountain lives. These two peaks held their heads above [[water]] during several of the preceding inundations.

60:4.4 The present [http://en.wikipedia.org/wiki/Rocky_Mountains North American Rocky Mountain region] is not the [[original]] elevation of land; that elevation had been long since leveled by [[erosion]] and then re-elevated. The present front range of mountains is what is left of the remains of the original range which was re-elevated. [http://en.wikipedia.org/wiki/Pike's_Peak Pikes Peak] and [http://en.wikipedia.org/wiki/Long's_Peak Longs Peak] are outstanding examples of this [[mountain]] activity, extending over two or more generations of mountain lives. These two peaks held their heads above [[water]] during several of the preceding inundations.