Louisiana Conservation Review, Vol. 2: November, 1931 (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Louisiana Conservation Review, Vol. 2: November, 1931

I doubt if there is any place in the world where so many profound lessons in geologic changes are so clearly shown as in the Grand Canyon Of the Colorado. There is no example on the surface of the earth where the work of weathering and of running water are so well illustrated as in that wonderful gorge. The Grand Canyon is over a mile in depth and from ten to twelve miles wide and 250 miles long. It exhibits an architecture unequaled in form or in line or in coloring anywhere in the world.

Imagine, if you will, for a few moments, a rock wall feet deep and 250 miles long in which there are sands, gravels, silts, and Shell muds that accumulated in an inland sea during millions of years. In these sediments there are records of ancient life that unfold to all who would read a wonderful story. There are strue tures that demonstrate that in the making of that wall Of rock, the lands were at times uplifted, mountains were formed, and worn away. There are indications in some Of the layers that the sea withdrew for a time, that the climate became very dry and that winds swept over the area and dis tributed sands far and wide. The principles learned in this one locality have a permanent value to the Observer. They can be used over and over again in various parts Of the world in the interpretation of the features Of certain land scapes.

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