geology

Push up some mountains. Cut them down. Drown the land under the sea. Push up some more mountains. Cut them down. Push up a third set of mountains, and let the river cut through them. __nconformity_ is the geologic term for an old, eroded land surface buried under younger rock layers. Put your outspread hand over the Carlin Canyon, Nevada unconformity and your fingers span roughly forty million years- the time that it took to bevel down the first set of mountains and deposit the younger layers on top. What is forty million years? Enough time for a small predatory dinosaur to evolve into a bird. Enough time for a four-legged, deer-like mammal to evolve into a whale. And far more than enough time to turn an ape-like creature in eastern Africa into a big-brained biped who can marvel at such things. The Grand Canyon__ Great Unconformity divides 1.7 billion-year-old rock from 550 million-year-old rock, a gap of more than one billion years. One billion years. I earn my salary studying the Earth and teaching its history, but I admit utter helplessness in comprehending such a span. A billion pages like those of this book would stack up more than forty miles. I had lived one bullion seconds a few days before my thirty-second birthday. A tape measure one billion inches long would stretch two-thirds of the way around the Earth. Such analogies hint at what deep time means- but they don__ get us there. __he human mind may not have evolved enough to be able to comprehend deep time," John McPhee once observed, __t may only be able to measure it.

The present is the key to the past.

That's Third Thoughts for you. When a huge rock is going to land on your head, they're the thoughts that think: Is that an igneous rock, such as granite, or is it sandstone?

For a billion years the patient earth amassed documents and inscribed them with signs and pictures which lay unnoticed and unused. Today, at last, they are waking up, because man has come to rouse them. Stones have begun to speak, because an ear is there to hear them. Layers become history and, released from the enchanted sleep of eternity, life's motley, never-ending dance rises out of the black depths of the past into the light of the present.

How many times did the sun shine, how many times did the wind howl over the desolate tundras, over the bleak immensity of the Siberian taigas, over the brown deserts where the Earth__ salt shines, over the high peaks capped with silver, over the shivering jungles, over the undulating forests of the tropics! Day after day, through infinite time, the scenery has changed in imperceptible features. Let us smile at the illusion of eternity that appears in these things, and while so many temporary aspects fade away, let us listen to the ancient hymn, the spectacular song of the seas, that has saluted so many chains rising to the light.

The scientific world of the time was in the midst of a terrible ferment, with discoveries and realizations coming at an unseemly rate. To many in the ranks of the conservative and the devout, the new theories of geology and biology were delivering a series of hammer blows to mankind's self-regard. Geologists in particular seemed to have gone berserk, to have thrown off all sense of proper obeisance to their Maker... Mankind, it seemed, was now suddenly rather _ dare one say it? _ insignificant. He may not have been, as he had eternally supposed, specially created.

Those who are ignorant of Geology, find no difficulty in believing that the world was made as it is; and the shepherd, untutored in history, sees no reason to regard the green mounds which indicate the site of a Roman camp, as aught but part and parcel of the primeval hill-side.

At present, a good many men engaged in scientific pursuits, and who have signally failed in gaining recognition among their fellows, are endeavoring to make reputations among the churches by delivering weak and vapid lectures upon the 'harmony of Genesis and Geology.' Like all hypocrites, these men overstate the case to such a degree, and so turn and pervert facts and words that they succeed only in gaining the applause of other hypocrites like themselves. Among the great scientists they are regarded as generals regard sutlers who trade with both armies.Surely the time must come when the wealth of the world will not be wasted in the propagation of ignorant creeds and miraculous mistakes. The time must come when churches and cathedrals will be dedicated to the use of man; when minister and priest will deem the discoveries of the living of more importance than the errors of the dead; when the truths of Nature will outrank the 'sacred' falsehoods of the past, and when a single fact will outweigh all the miracles of Holy Writ.Who can over estimate the progress of the world if all the money wasted in superstition could be used to enlighten, elevate and civilize mankind?When every church becomes a school, every cathedral a university, every clergyman a teacher, and all their hearers brave and honest thinkers, then, and not until then, will the dream of poet, patriot, philanthropist and philosopher, become a real and blessed truth.

That's the thing about rocks--they don't break easily. When I held them, I wanted to be like them-strong and steady, weathered but not broken.

If the people of Europe had known as much of astronomy and geology when the bible was introduced among them, as they do now, there never could have been one believer in the doctrine of inspiration. If the writers of the various parts of the bible had known as much about the sciences as is now known by every intelligent man, the book never could have been written. It was produced by ignorance, and has been believed and defended by its author. It has lost power in the proportion that man has gained knowledge. A few years ago, this book was appealed to in the settlement of all scientific questions; but now, even the clergy confess that in such matters, it has ceased to speak with the voice of authority. For the establishment of facts, the word of man is now considered far better than the word of God. In the world of science, Jehovah was superseded by Copernicus, Galileo, and Kepler. All that God told Moses, admitting the entire account to be true, is dust and ashes compared to the discoveries of Descartes, Laplace, and Humboldt. In matters of fact, the bible has ceased to be regarded as a standard. Science has succeeded in breaking the chains of theology. A few years ago, Science endeavored to show that it was not inconsistent with the bible. The tables have been turned, and now, Religion is endeavoring to prove that the bible is not inconsistent with Science. The standard has been changed.

Have you ever plunged into the immensity of space and time by reading the geological treatises of Cuvier? Borne away on the wings of his genius, have you hovered over the illimitable abyss of the past as if a magician's hand were holding you aloft? As one penetrates from seam to seam, from stratum to stratum and discovers, under the quarries of Montmartre or in the schists of the Urals, those animals whose fossilized remains belong to antediluvian civilizations, the mind is startled to catch a vista of the milliards of years and the millions of peoples which the feeble memory of man and an indestructible divine tradition have forgotten and whose ashes heaped on the surface of our globe, form the two feet of earth which furnish us with bread and flowers. Is not Cuvier the greatest poet of our century? Certainly Lord Byron has expressed in words some aspects of spiritual turmoil; but our immortal natural historian has reconstructed worlds from bleached bones.

I guess she was a life line Sewing our family fabric togetherFrom me to dad to herGave me a sense of continuity Especially when my daughter was bornAs she was slipping away

I pace the shallow sea, walking the time between, reflecting on the type of fossil I__ like to be. I guess I__ like my bones to be replaced by some vivid chert, a red ulna or radius, or maybe preserved as the track of some lug-soled creature locked in the sandstone- how did it walk, what did it eat, and did it love sunshine?

Ahead and to the west was our ranger station - and the mountains of Idaho, poems of geology stretching beyond any boundaries and seemingly even beyond the world.

Earth is ancient now, but all knowledge is stored up in her. She keeps a record of everything that has happened since time began. Of time before time, she says little, and in a language that no one has yet understood. Through time, her secret codes have gradually been broken. Her mud and lava is a message from the past.Of time to come, she says much, but who listens?

We can only predict the future ecological changes, by emergence of the past into the present.

The geologist takes up the history of the earth at the point where the archaeologist leaves it, and carries it further back into remote antiquity.

A thought that stayed with me was that I had entered a private place in the earth. I had seen exposed nearly its oldest part. I had lost my sense of urgency, rekindled a sense of what people were, clambering to gain access to high waterfalls and a sense of our endless struggle as a species to understand time and to estimate the consequences of our acts.