The Book of the National Parks

by Robert Sterling Yard

To see in the carved and colorful depths of the Grand Canyon not only the stupendous abyss whose terrible beauty grips the soul, but also to-day's chapter in a thrilling story of creation whose beginning lay untold centuries back in the ages, whose scene covers three hundred thousand square miles of our wonderful southwest, whose actors include the greatest forces of nature, whose tremendous episodes shame the imagination of Doré, and whose logical end invites suggestions before which finite minds shrink—this is to come into the presence of the great spectacle properly equipped for its enjoyment. But how many who see the Grand Canyon get more out of it than merely the beauty that grips the soul?

So it is throughout the world of scenery. The geologic story written on the cliffs of Crater Lake is more stupendous even than the glory of its indigo bowl. The war of titanic forces described in simple language on the rocks of Glacier National Park is unexcelled in sublimity in the history of mankind. The story of Yellowstone's making multiplies many times the thrill occasioned by its world-famed spectacle. Even the simplest and smallest rock details often tell thrilling incidents of prehistoric tunes out of which the enlightened imagination reconstructs the romances and the tragedies of earth's earlier days.

How eloquent, for example, was the small, water-worn fragment of dull coal we found on the limestone slope of one of Glacier's mountains! Impossible companionship! The one the product of forest, the other of submerged depths. Instantly I glimpsed the distant age when thousands of feet above the very spot upon which I stood, but then at sea level, bloomed a Cretaceous forest, whose broken trunks and matted foliage decayed in bogs where they slowly turned to coal; coal which, exposed and disintegrated during intervening ages, has long since—all but a few small fragments like this—washed into the headwaters of the Saskatchewan to merge eventually in the muds of Hudson Bay. And then, still dreaming, my mind leaped millions of years still further back to lake bottoms where, ten thousand feet below the spot on which I stood, gathered the pre-Cambrian ooze which later hardened to this very limestone. From ooze a score of thousand feet, a hundred million years, to coal! And both lie here together now in my palm! Filled thus with visions of a perspective beyond human comprehension, with what multiplied intensity of interest I now returned to the noble view from Gable Mountain!

In pleading for a higher understanding of Nature's method and accomplishment as a precedent to study and observation of our national parks, I seek enormously to enrich the enjoyment not only of these supreme examples but of all examples of world making. The same readings which will prepare you to enjoy to the full the message of our national parks will invest your neighborhood hills at home, your creek and river and prairie, your vacation valleys, the landscape through your car window, even your wayside ditch, with living interest. I invite you to a new and fascinating earth, an earth interesting, vital, personal, beloved, because at last known and understood!

It requires no great study to know and understand the earth well enough for such purpose as this. One does not have to dim his eyes with acres of maps, or become a plodding geologist, or learn to distinguish schists from granites, or to classify plants by table, or to call wild geese and marmots by their Latin names. It is true that geography, geology, physiography, mineralogy, botany and zoology must each contribute their share toward the condition of intelligence which will enable you to realize appreciation of Nature's amazing earth, but the share of each is so small that the problem will be solved, not by exhaustive study, but by the selection of essential parts. Two or three popular books which interpret natural science in perspective should pleasurably accomplish your purpose. But once begun, I predict that few will fail to carry certain subjects beyond the mere essentials, while some will enter for life into a land of new delights.

Let us, for illustration, consider for a moment the making of America. The earth, composed of countless aggregations of matter drawn together from the skies, whirled into a globe, settled into a solid mass surrounded by an atmosphere carrying water like a sponge, has reached the stage of development when land and sea have divided the surface between them, and successions of heat and frost, snow, ice, rain, and flood, are busy with their ceaseless carving of the land. Already mountains are wearing down and sea bottoms are building up with their refuse. Sediments carried by the rivers are depositing in strata, which some day will harden into rock.

We are looking now at the close of the era which geologists call Archean, because it is ancient beyond knowledge. A few of its rocks are known, but not well enough for many definite conclusions. All the earth's vast mysterious past is lumped under this title.

The definite history of the earth begins with the close of the dim Archean era. It is the lapse from then till now, a few hundred million years at most out of all infinity, which ever can greatly concern man, for during this time were laid the only rocks whose reading was assisted by the presence of fossils. During this time the continents attained their final shape, the mountains rose, and valleys, plains, and rivers formed and re-formed many times before assuming the passing forms which they now show. During this time also life evolved from its inferred beginnings in the late Archean to the complicated, finely developed, and in man's case highly mentalized and spiritualized organization of To-day.

Surely the geologist's field of labor is replete with interest, inspiration, even romance. But because it has become so saturated with technicality as to become almost a popular bugaboo, let us attempt no special study, but rather cull from its voluminous records those simple facts and perspectives which will reveal to us this greatest of all story books, our old earth, as the volume of enchantment that it really is.

With the passing of the Archean, the earth had not yet settled into the perfectly balanced sphere which Nature destined it to be. In some places the rock was more compactly squeezed than in others, and these denser masses eventually were forced violently into neighbor masses which were not so tightly squeezed. These movements far below the surface shifted the surface balance and became one of many complicated and little known causes impelling the crust here to slowly rise and there to slowly fall. Thus in places sea bottoms lifted above the surface and became land, while lands elsewhere settled and became seas. There are areas which have alternated many times between land and sea; this is why we find limestones which were formed in the sea overlying shales which were formed in fresh water, which in turn overlie sandstones which once were beaches—all these now in plateaus thousands of feet above the ocean's level.