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Timefulness - How Thinking Like a Geologist Can Help Save the World - Hardcover

Bjornerud, Marcia

 
9780691181202: Timefulness - How Thinking Like a Geologist Can Help Save the World

Inhaltsangabe

Why an awareness of Earth’s temporal rhythms is critical to our planetary survival

Few of us have any conception of the enormous timescales in our planet’s long history, and this narrow perspective underlies many of the environmental problems we are creating for ourselves. The passage of nine days, which is how long a drop of water typically stays in Earth’s atmosphere, is something we can easily grasp. But spans of hundreds of years—the time a molecule of carbon dioxide resides in the atmosphere—approach the limits of our comprehension. Our everyday lives are shaped by processes that vastly predate us, and our habits will in turn have consequences that will outlast us by generations. Timefulness reveals how knowing the rhythms of Earth’s deep past and conceiving of time as a geologist does can give us the perspective we need for a more sustainable future.

Marcia Bjornerud shows how geologists chart the planet’s past, explaining how we can determine the pace of solid Earth processes such as mountain building and erosion and comparing them with the more unstable rhythms of the oceans and atmosphere. These overlapping rates of change in the Earth system—some fast, some slow—demand a poly-temporal worldview, one that Bjornerud calls “timefulness.” She explains why timefulness is vital in the Anthropocene, this human epoch of accelerating planetary change, and proposes sensible solutions for building a more time-literate society.

This compelling book presents a new way of thinking about our place in time, enabling us to make decisions on multigenerational timescales. The lifespan of Earth may seem unfathomable compared to the brevity of human existence, but this view of time denies our deep roots in Earth’s history—and the magnitude of our effects on the planet.

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Über die Autorin bzw. den Autor

Marcia Bjornerud is professor of geology and environmental studies at Lawrence University. She is the author of Reading the Rocks: The Autobiography of the Earth and a contributing writer for Elements, the New Yorker’s science and technology blog. She lives in Appleton, Wisconsin.

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Timefulness

How Thinking Like a Geologist Can Help Save the World

By Marcia Bjornerud

PRINCETON UNIVERSITY PRESS

Copyright © 2018 Princeton University Press
All rights reserved.
ISBN: 978-0-691-18120-2

Contents

Acknowledgments, vi,
Prologue: The Allure of Timelessness, 1,
1 A Call for Timefulness, 6,
2 An Atlas of Time, 21,
3 The Pace of the Earth, 62,
4 Changes in the Air, 93,
5 Great Accelerations, 126,
6 Timefulness, Utopian and Scientific, 159,
Epilogue, 180,
APPENDIXES,
I Simplified Geologic Timescale, 184,
II Durations and Rates of Earth Phenomena, 186,
III Environmental Crises in Earth's History: Causes and Consequences, 190,
Notes, 193,
Index, 203,


CHAPTER 1

A CALL FOR TIMEFULNESS

Omnia mutantur, nihil interit (Everything changes, nothing perishes).

— OVID, METAMORPHOSES, AD 8


A BRIEF HISTORY OF TIME DENIAL

As a geologist and professor I speak and write rather cavalierly about eras and eons. One of the courses I routinely teach is "History of Earth and Life," a survey of the 4.5-billion-year saga of the entire planet — in a 10-week trimester. But as a human, and more specifically as a daughter, mother, and widow, I struggle like everyone else to look Time honestly in the face. That is, I admit to some time hypocrisy.

Antipathy toward time clouds personal and collective thinking. The now risible "Y2K" crisis that threatened to cripple global computer systems and the world economy at the turn of the millennium was caused by programmers in the 1960s and '70s who apparently didn't really think the year 2000 would ever arrive. Over the past decade, Botox treatments and plastic surgery have come to be viewed as healthy boosts to self-esteem rather than what they really are: evidence that we fear and loathe our time-iness. Our natural aversion to death is amplified in a culture that casts Time as an enemy and does everything it can to deny its passage. As Woody Allen said: "Americans believe death is optional."

This type of time denial, rooted in a very human combination of vanity and existential dread, is perhaps the most common and forgivable form of what might be called chronophobia. But there are other, more toxic varieties that work together with the mostly benign kind to create a pervasive, stubborn, and dangerous temporal illiteracy in our society. We in the twenty-first century would be shocked if an educated adult were unable to identify the continents on a world map, yet we are quite comfortable with widespread obliviousness about anything but the most superficial highlights from the planet's long history (um, Bering Strait ... dinosaurs ... Pangaea?). Most humans, including those in affluent and technically advanced countries, have no sense of temporal proportion — the durations of the great chapters in Earth's history, the rates of change during previous intervals of environmental instability, the intrinsic timescales of "natural capital" like groundwater systems. As a species, we have a childlike disinterest and partial disbelief in the time before our appearance on Earth. With no appetite for stories lacking human protagonists, many people simply can't be bothered with natural history. We are thus both intemperate and intemporate — time illiterate. Like inexperienced but overconfident drivers, we accelerate into landscapes and ecosystems with no sense of their long-established traffic patterns, and then react with surprise and indignation when we face the penalties for ignoring natural laws. This ignorance of planetary history undermines any claims we may make to modernity. We are navigating recklessly toward our future using conceptions of time as primitive as a world map from the fourteenth century, when dragons lurked around the edges of a flat earth. The dragons of time denial still persist in a surprising range of habitats.

Among the various foes of time, Young Earth creationism breathes the most fire but is at least predictable in its opposition. In years of teaching geology at the university level, I have had students from evangelical Christian backgrounds who earnestly struggle to reconcile their faith with the scientific understanding of the Earth. I truly empathize with their distress and try to point out paths toward resolution of this internal discord. First, I emphasize that my job is not to challenge their personal beliefs but to teach the logic of geology (geo-logic?) — the methods and tools of the discipline that enable us not only to comprehend how the Earth works at present but also to document in detail its elaborate and awe-inspiring history. Some students seem satisfied with keeping science and religious beliefs separate through this methodological remove. But more often, as they learn to read rocks and landscapes on their own, the two worldviews seem increasingly incompatible. In this case, I use a variation on the argument made by Descartes in his Meditations about whether his experience of Being was real or an elaborate illusion created by a malevolent demon or god.

Early in an introductory geology course, one begins to under-stand that rocks are not nouns but verbs — visible evidence of processes: a volcanic eruption, the accretion of a coral reef, the growth of a mountain belt. Everywhere one looks, rocks bear witness to events that unfolded over long stretches of time. Little by little, over more than two centuries, the local stories told by rocks in all parts of the world have been stitched together into a great global tapestry — the geologic timescale. This "map" of Deep Time represents one of the great intellectual achievements of humanity, arduously constructed by stratigraphers, paleontologists, geochemists, and geochronologists from many cultures and faiths. It is still a work in progress to which details are constantly being added and finer and finer calibrations being made. So far, no one in more than 200 years has found an anachronistic rock or fossil — as biologist J.B.S. Haldane reputedly said, "a Precambrian rabbit" — that would represent a fatal internal inconsistency in the logic of the timescale.

If one acknowledges the credibility of the methodical work by countless geologists from around the world (many in the service of petroleum companies), and one believes in a God as creator, the choice is then whether to accept the idea of (1) an ancient and complex Earth with epic tales to tell, set in motion eons ago by a benevolent creator, or (2) a young Earth fabricated only a few thousand years ago by a devious and deceitful creator who planted specious evidence of an old planet in every nook and cranny, from fossil beds to zircon crystals, in anticipation of our explorations and laboratory analyses. Which is more heretical? A corollary of this argument, to be deployed with tact and care, is that compared with the deep, rich, grand geologic story of Earth, the Genesis version is an offensive dumbing-down, an oversimplification so extreme as to be disrespectful to the Creation.

While I have sympathy for individuals wrestling with theological questions, I have no tolerance for those who intentionally spread brain-fogging pseudoscience under the aegis of (-suspiciously well-funded) religious organizations. My colleagues and I despair at the existence of atrocities like Kentucky's Creation Museum, and the disheartening frequency with which Young Earth websites appear when students search for information about, say, isotopic dating. But I...

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