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Devil in the Mountain: A Search for the Origin of the Andesby Simon Lamb
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How do high mountain ranges form on the face of the Earth? This question has intrigued some of the greatest philosophers and scientists, going back as far as the ancient Greeks. Devil in the Mountain is the story of one scientist, author Simon Lamb, and his quest for the key to this great geological mystery. Lamb and a small team of geologists have spent much of the last decade exploring the rugged Bolivian Andes, the second highest mountain range on Earth -- a region rocked by earthquakes and violent volcanic eruptions. The author's account is both travelogue and detective story, describing how he and his colleagues have pursued a trail of clues in the mountains, hidden beneath the rocky landscape. Here, the local silver miners strive to appease the spirit they call Tio -- the devil in the mountain.
Traveling through Bolivia's back roads, the team has to cope with the extremes of the environment, and survive in a country on the verge of civil war. But the backdrop to all these adventures is the bigger story of the Earth and how geologists have gone about uncovering its secrets. We follow the tracks of the dinosaurs, who never saw the Andes but left their mark on the shores of a vast inland sea that covered this part of South America more than sixty-five million years ago, long before the mountains existed. And we learn how to find long-lost rivers that once flowed through the landscape, how continents are twisted and torn apart, and where volcanoes come from. By the end of their journey, Lamb and his team turn up extraordinary evidence pointing not only to the fundamental instability of the Earth's surface, but also to unexpected and profound links in the workings of our planet.
The New York Times
"An absorbing account of the many years Lamb has spent exploring and pondering the Andes. But the book is not simply about a particular place or one scientific career. Lamb gives his readers a wonderful feel for how geology works- how geologists gather clues, test hypotheses and ultimately come to understand the workings of the world. . . . [The book] make[s] us so familiar with the history of the Andes that they become living things."Carl Zimmer, New York Times Book Review
"An absorbing account of how geologists come to understand the workings of the world."The New York Times
"Simon Lamb's book is an enticing blend of personal adventure and scientific explanation. It is an unusual scientist who manages to describe the world vividly but also explain the science clearly. . . . Lamb takes us painlessly through the workings of the great engine of the earthand what could be more important than understanding how our planet is put together. . . . His descriptions of flogging through the jungle-clad eastern foothills of the Andes leave one relieved to be able to experience it all from the comfort of an armchair."Richard A. Fortey,Times Literary Supplement
"[An] engrossing and well-written book. . . . Lamb's writing is engaging and clear. . . . Even when he tackles esoteric areas of geophysics and dynamical modeling far from his own field of expertise, Lamb exhibits an enviable facility for simplifying complex and, in some cases, quite controversial ideas. He has keen insight into Bolivian geology and a sympathetic eye for local culture. . . . Devil in the Mountain makes compelling reading. Lamb has done a masterful job in piecing together the Andean puzzle in a way that seems to make perfect sense."David E. James,Nature
"[Lamb's] prose is lively and for the most part free of jargon. His tales of adventures during individual field campaigns engage readers in a way that a straight science text could not. Most important, he describes particularly well the process by which a field geologist interprets the Earth."Richard W. Allmendinger,American Scientist
"This book describes physical quests as well as a scientific one. The history of mountains can only be told in millennia, but in America the history of people's attempts to make mountains their own can be told in a few centuries."Washington Post Book World
Richard A. Fortey
David E. James
Richard W. Allmendinger
- Princeton University Press
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Devil in the Mountain
A Search for the Origin of the Andes
By Simon Lamb, Gary Hincks
PRINCETON UNIVERSITY PRESSCopyright © 2004 Simon Lamb
All rights reserved.
Devil in the Mountain
Devil, n. Superhuman malignant being; fighting spirit, energy or dash in attack; mischievously energetic, clever or self-willed person; literary hack doing what his employer takes the credit and pay for. (OED)
A Simple Question
In Bolivia, the local silver miners consider the entrance tunnel of a mine, so laboriously hewn into solid rock, as the gateway into a mysterious realm ruled by earth spirits. The miners are burglars in this underground world, stealing its riches. They are at the mercy of the wicked Tio — the devil in the mountain — who decides the fate of each mine. The miners place a grotesque statue of the devil near the mine entrance to constantly remind themselves of his presence. Each time that they pass this statue, they adorn its head with small presents of cigarettes, money, coca leaves, or sticks of dynamite, hoping that these will keep the devil happy, ensuring the success and safety of their mine.
To a certain breed of scientist — geologists — the devil in the mountain can be interpreted another way. It is geology, the sum total of things that make up the bedrock of our world — the stuff we live on. This bedrock contains a story of events going back to the remote past of our planet, a story that will show, among many other things, why one mountain contains a rich seam of silver while another is just barren rock. In the past two hundred years, scientists have completely lost their fear of the devil in the mountain, developing techniques to chronicle the sequence of events that make up the history of the Earth.
Today, geologists are not content to just reveal the planet's history. Like historians who delve into long past human conflicts, they also want to know why these events happened, searching for the underlying fundamental laws that govern them. There are many lines of geological investigation, and different geologists have pursued answers to their own particular questions. Some geologists — or rather geophysicists — have searched for the fundamental engine that drives the restless Earth, exploring the deep interior of the planet. Others have tried to understand the causes of past changes in the Earth's climate, probing the behavior of the planet's atmosphere and oceans. Yet others — paleontologists — have puzzled over the factors that have controlled the course of the evolution of life, triggering great explosions of life or its demise during mass extinctions. Most geologists are content with tackling one small part of the overarching themes, exorcizing their own particular "devils" and thereby fitting a few extra pieces into the overall jigsaw puzzle of scientific understanding. They have their own fascinating tales to tell of their particular scientific investigations, and the combined effect of all these endeavors has slowly begun to reveal a much bigger picture of how our planet works.
This book describes how I, as a geologist, tried to solve a scientific problem that has long fascinated me. It is the story of the search for the answer to a simple question: why are there high mountain ranges on the face of the Earth, in the continents? Most of the world lies far beneath the sea, and dry land is on average only a few hundred meters above sea level. So, high mountain ranges, reaching more than 2,000 meters (6,500 feet) above sea level, form only a tiny fraction of the Earth's surface. Despite this, they are hardly features of the planet that one can miss. The great mountain chains seem to tower above the rest of the world, following distinct zones that snake across Europe and Asia, from the Pyrenees and along the Alps to the Himalayas and Tibet, or along the western edge of the Americas from Alaska down to Patagonia. From the perspective of our busy lives, on the plains or deep down in the valley bottoms, they can appear vast and forbidding. And from their summits our human world looks decidedly small and unimportant.
Exploring mountainous regions has always been difficult. For this reason, I suppose, I have always been intrigued by these parts of the Earth, where a high ridge of rock can wall off a valley from its neighbors, creating an isolated world. But what forces or processes in the Earth govern their location, overall shape, and height? Some of the greatest scientists, going back at least as far as the ancient Greeks, have tried to answer this question. And it is not a dry and dusty academic question, but one that is central to understanding many important aspects of our planet, including our own evolution. With the specter of global warming looming on the horizon, scientists have been looking ever more closely at the planet's climate. It has become clear that mountain ranges can exert an enormous influence on this climate, determining not only its temperature but also the distribution of rainfall. It follows that the rise of mountain ranges in the past, or their subsequent demise, has driven profound changes in the climate. Biologists are beginning to see that these changes are one of the ways that the planet steers the course of life's evolution.
By chance, my own search for an answer has led me to the high Andes of Bolivia, where over the past fourteen years, on many expeditions, I have tried to chronicle the geological history of these mountains. And so the book contains another story, the day-to-day story of my journeys in this extraordinary part of the world.
A Conversation with Rocks
Anybody listening to two geologists talking would be struck by one thing above all — the sheer range in scale of the subject matter. Geologists habitually think about processes that occur on time scales that are far outside the human experience, taking place over thousands to billions of years. They will observe phenomena that are on a scale of microns (millionths of a meter) to thousands of kilometers. And they will try to weave all these time and size scales into an overall understanding of the way the planet works.
At some point in any geological investigation, a geologist will venture out of the laboratory into the real world, or as a geologist will say, into the field. A considerable part of a geologist's training is concerned with the basic craft of fieldwork — something that some people are naturally better at than others. Good field geologists have an uncanny ability to make the right observations at the right time, to sort out the simplicity of the natural world from all its complexity. Being among them is a rare chance to hear nature speaking clearly. The apparent ease with which they make their observations is often deceptive — on one's own again, the world looks as cluttered and messy as ever.
Geologists go where the rocks are. The rocks are not always in easy places. And, unlike tourists, who usually accept much of what they are told on their fleeting visit, geologists continually observe and ask questions, getting under the skin of the landscape they study. Ideally, a geologist would like to be able to flit from one place to another with an all-seeing eye, effortlessly taking in the key observations. Reality is very different. Much of your time is spent just getting around. And often you have no clear idea of where to look, or even, sometimes, what you are looking for. But somehow, if you persevere, the observations start to create patterns or ideas in the mind, and these grow and grow until you seem to be involved in a curious dialogue: the rocks speak, you reply with a question, and they answer back.
Birth of a Project
Look at any map of the world and your eye will be caught by the long, sinuous mountain chain on the western margin of South America. These are the Andes, forming the second largest mountainous region on Earth after the great ranges of Asia. The name conjures up images of high mountain countries, once ruled by the Inca empire and conquered by the Spanish conquistadors in the sixteenth century. The Spanish subsequently extracted a vast mineral wealth of silver and gold from the mountains — a wealth that financed the Spanish empire. Today, the region is alive with geological activity, rocked by large earthquakes and explosive volcanic eruptions, a region rich in pickings for a geologist.
The Andean project was the idea of John Dewey, professor of geology at Oxford University. In the early 1970s Dewey was one of the few geologists who saw how to use the new, exciting theory of plate tectonics to make sense of a vast range of geological ideas and observations. He had shown that the rocks in the continents contained a record of plate tectonics going back hundreds of millions of years. And he could explain the variety of rocks found in many mountains in terms of the opening and closing of long vanished oceans.
John Dewey believed that the Andes were the place to solve many fundamental problems about the Earth, such as the reasons for earthquakes and volcanoes, the forces that drive the movements of its surface, and, ultimately, the origin of the continents themselves. Though the Andes were deeply embedded in the geologist's jargon — a common type of volcanic rock, found in many parts of the world, is called andesite after the Andes — they were somehow being neglected by geologists. The eye of the geological community was turned toward the Himalayas and Tibet. Yet, as we shall see, many geological clues to the way the Earth works were first found in the Andes.
The late 1980s was a good time to think about working in South America because a number of big, multinational oil companies had decided to invest heavily in oil exploration there, both in the Andes and along its eastern margin. One of these companies agreed to pay for a five-year research project that would provide background information for their own geologists working in the region. They left the details deliberately vague. The idea was to let the project have the room to develop in its own way. Whether the company was right, time will tell, though without doubt this unusual freedom gave rise to a very unusual research project.
In 1989 I was at a loose end. I had recently returned from New Zealand, where I had been studying the effects of earthquakes and fault lines along the boundary between two great tectonic plates. I had just presented the results of some of this work at a conference in Greece. Here, I met up again with Philip England, who had been recently appointed as a geophysicist at Oxford University. Philip passed on my name to John Dewey, who was on the lookout for somebody to run his South American project. I had no idea that the job would occupy more than a decade of my life. During this period, Dewey gave me complete freedom to travel where I wanted and develop my own research.
Our choice of Bolivia as the focus for the project started with a telephone call. I rang up the Foreign Office in London for advice about working in South America and was put through to a man on the South American desk. I told him that I was running a scientific research project in the Andes. Did the Foreign Office have any particular advice about undertaking this sort of work in South America? His reply made me feel rather gloomy:
"Well, I wouldn't go to the northern part of South America — it is far too dangerous with the various drug wars. Peru is out because of the Sendero Luminoso guerrillas — the Peruvian government have lost control of most of the country. There have been a number of military rebellions in Argentina — the country is still very unstable after the Falklands disaster and they don't like the English. Chile is a bit tricky at the moment because there is strong popular feeling against General Pinochet and it is unclear whether he is going to give up power voluntarily."
He paused for a while, then said rather doubtfully:
"Well, there is Bolivia."
I knew that Bolivia was very poor and that it was supposed to have been the scene, near San Vicente, of many of Butch Cassidy and the Sundance Kid's more daring robberies, stealing money from the rich mines. Also, I had always thought that Bolivia was the most dangerous and difficult South American country of all.
"Bolivia?" I echoed.
"Yes" — he sounded much more confident now — "do yourself a favor and go to Bolivia. I can't see any real problems there at the moment. The currency is fairly stable and they have a democratic government."
This final comment has to be seen in the light of the fact (as I subsequently discovered) that in the roughly two hundred years of the Republic of Bolivia, there has been on average a change of president every six months — usually as a result of a military coup. Also, in the late 1980s Bolivia had just emerged from an unusually severe bout of hyperinflation, with an annual inflation rate of 24,000 percent. When I first arrived in La Paz in 1989, the smallest note denominations were one million and ten million pesos — these had been optimistically relabeled as one and ten Bolivianos. A standard scam was to palm off on unsuspecting tourists million-peso notes as change instead of ten million pesos — you had to be quick thinking to notice whether there were six or seven zeros after the one.
Curiously enough, it made good scientific sense to base our project in Bolivia. The mountain ranges of the Andes are highest and widest there, and there is an intriguing swing in their general orientation, following the curve of the coastline. Since first looking at maps of South America, I had a feeling — which I had never quite thought through properly — that the key to understanding the origin of the Andes lay in the high peaks of Bolivia. For this reason, after my initial reaction, I was very receptive to the idea of working there.
I probed the man on the South American desk a bit more to reassure myself that he was serious about his suggestion, then hung up with a feeling of excitement. I was beginning to feel that what at first had seemed to be an academic exercise was developing into an adventure. But, if you really want to know how this adventure unfolded, I need to prepare you for it, trying to put you into my shoes, as it were, when I first embarked on my research. The best way to do this, I think, is to begin telling a story stretching back over two thousand years — a story that I find fascinating in its own right — of how geologists have struggled to make sense of mountains. Their discoveries formed the basis of the stock of ideas and preconceptions that I set out with — some of these I soon discarded, but others I came to value more and more.
In everything that follows, I have tried to be as self-explanatory as possible. However, it is difficult to discuss many geological phenomena without making use of some basic ideas or jargon. Though I have gone to great lengths to unpack these wherever I first use or introduce them, you may still find it helpful to remind yourself of the meanings of particular terms, especially when they reappear later on, by dipping into the selected glossary at the back of the book.CHAPTER 2
A Mountain of a Problem
Mountain, n. Large natural elevation of earth's surface, large or high and steep hill, esp. one over 1000 ft. high.
Problem, n. Thing hard to understand. (OED)
If you drive north of the fishing port of Ullapool, far up on the northwest corner of Scotland, you will eventually come to Inchnadamph on the shores of Loch Assynt. You would be forgiven for missing Inchnadamph altogether as it consists of no more than a hotel and a handful of scattered houses. Even less easy to find is a small cairn perched on top of a low hill overlooking the loch. A bronze plaque on the side of the cairn preserves the names of two British geologists, Benjamin Peach and John Horne, who were sent in 1883 by the British Geological Survey to make a geological map of the rocks in this part of Scotland. Peach and Horne walked or rode over virtually every inch of the remote and rugged moorland and hillsides, covering thousands of squares kilometers, recording and measuring the rocks. They eventually produced in 1892 what many geologists today consider to be the pinnacle of geological achievement, quite simply, the finest geological map ever made.
I am very familiar with Peach and Horne's map because I take a class of undergraduate geology students to this part of Scotland every year. We often stay at the Inchnadamph Hotel. Here, in the lobby, is a photograph of Peach dressed in the tweed outdoor clothes of the time, wearing a deer stalking hat and leaning on a stout walking stick, resting after a day showing some of Europe's most eminent geologists his discoveries. And in the hotel's visitor book, in a beautiful flowing script, are Peach's and Horne's signatures. Countless times, after a hard day teaching the students about geological map making, I have escaped the noisy and crowded hotel and made my way to the Peach and Horne memorial. There, the landscape seems peaceful in the evening light, disturbed only by the flutter of bats chasing midges chasing myself. But the rocks in the rugged hillsides contain an extraordinary story of upheavals of the Earth's surface on a scale not believed before Peach and Horne started making their map.
Excerpted from Devil in the Mountain by Simon Lamb, Gary Hincks. Copyright © 2004 Simon Lamb. Excerpted by permission of PRINCETON UNIVERSITY PRESS.
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What People are Saying About This
S. George Philander, Princeton University, author of the forthcoming "Our Affair with El Nino: How We Transformed an Enchanting Peruvian Current into a Global Climate Hazard".
Grant Heiken, past president, International Association of Volcanology and Chemistry of the Earth's Interior, and co-author of "Volcanoes: Crucibles of Change" and the forthcoming "The Seven Hills of Rome"
Maarten J. de Wit, University of Cape Town, Rondebosch
Meet the Author
Simon Lamb is Lecturer in the Department of Earth Sciences at Oxford University and a Fellow of St. Cross College. He is coauthor of "Earth Story: The Forces That Have Shaped Our Planet", recently revised in paperback by Princeton University Press.
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