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Good Reads  Earth System Sciences  Geosphere  Regional & Local Geology

The Greywacke How a Priest, a Soldier and a Schoolteacher Uncovered 300 Million Years of History

By: Nick Davidson(Author), Andrey Kurochkin(Illustrator)
280 pages, b/w photos, b/w illustrations
Publisher: Profile Books
NHBS
Telling the story of the three scholars who gave us the names for five geological periods, The Greywacke unlocks for a general audience a historical episode so far consigned to more technical literature.
The Greywacke
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  • The Greywacke ISBN: 9781788163781 Paperback May 2022 Usually dispatched within 6 days
    £10.99
    #254887
  • The Greywacke ISBN: 9781788163774 Hardback May 2021 Out of Print #252884
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About this book Customer reviews Biography Related titles

About this book

The story of three 19th-century geologists whose fraternal rivalry ended up rewriting the history of our planet

Adam Sedgwick was a priest and scholar. Roderick Murchison was a retired soldier. Charles Lapworth was a schoolteacher. It was their personal and intellectual rivalry, pursued on treks through Wales, Scotland, Cornwall, Devon and parts of western Russia, that revealed the narrative structure of the Paleozoic Era, the 300-million-year period during which life on Earth became recognisably itself.

Nick Davidson follows in their footsteps and draws on maps, diaries, letters, field notes and contemporary accounts to bring the ideas and characters alive. But this is more than a history of geology. As we travel through some of the most spectacular scenery in Britain, it's a celebration of the sheer visceral pleasure generations of geologists have found, and continue to find, in noticing the earth beneath our feet.

Customer Reviews (1)

  • A fascinating piece of science history
    By Leon (NHBS Catalogue Editor) 31 Mar 2022 Written for Paperback


    Take a look at the geological time scale. Thanks to the dinosaurs, we have all heard of the Cretaceous, Jurassic, and Triassic. However, going back in time from the Triassic, the Phanerozoic Eon in which we live today stretches another 289 million years into the past; from the Permian that ended ~252 million years ago, through the Carboniferous, Devonian, Silurian, Ordovician, to the Cambrian that started ~539 million years ago. In The Greywacke, amateur geologist Nick Davidson tells the story of how those geological periods got their names and transports the reader back to the heydays of Victorian geology when three men would make Britain's rocks the centre of international attention. In so doing, he unlocks for a general audience an episode in the history of geology that was so far consigned to more technical literature.

    When William Smith produced the first stratigraphical map of England and Wales in 1815, he was not able to further classify the rocks of Wales. A chaotic and incomprehensible jumble of hard-to-trace strata, they were collectively referred to as the titular Greywacke. Given that these rocks might contain the first evidence of life on Earth, they were of great interest to geologists. From 1831 to 1920, three scholars would spend their lifetimes deciphering them.

    Davidson dedicates most of his book to the careers and achievements of Adam Sedgwick (1785–1873), a priest and geology professor, and Roderick Murchison (1792–1871), a retired soldier with unfulfilled dreams of military glory and a family fortune to burn on his new geology hobby. Starting in 1832, they collaborated on cracking the identity of the Welsh rocks.

    A very brief outline, which Davidson develops in detail over the course of nine chapters, runs something like this. Dividing Wales between them, both men identified a series of rock strata. Sedgwick called his seemingly older series the Cambrian and Murchison called his seemingly younger series the Silurian. The problem that they decided to largely ignore, and that would come back to haunt them, was whether these sequences overlapped in time or were separate. Sedgwick's career subsequently stalled; doubts, procrastination, poor health, and the workload of clerical and administrative duties all took their toll. Despite encouragement from Murchison and other geologists, he was unable to develop a more sophisticated understanding of the Cambrian rocks, nor identify diagnostic fossils. Murchison, however, became a celebrity, his Silurian system widely adopted. In Devon, together with Sedgwick, he resolved confusion over the presence of younger Carboniferous strata amidst older Silurian rocks by designating the intermediate layer with anomalous fossils as Devonian. In western Russia, he identified the Permian, a new rock layer named after the Russian city of Perm. His book on the geology of Russia won him international accolades and he was basking in the fame and glory he never achieved as a soldier.

    As Davidson details, though, Murchison's fame had some shady sides to it. He rarely acknowledged the geologists and quarrymen who helped him in the field. He glossed over stratigraphical inconsistencies and fossil anomalies. And as he climbed the social ladder, his contemporaries noted in private his increasing arrogance and condescending nature. Younger geologists were quietly suspicious that his sweeping picture was hiding a more nuanced and complex story, but few would openly confront him. Two episodes, told here, illustrate why. By 1852, the souring friendship between Sedgwick and Murchison blew up over the above-mentioned overlap between Cambrian and Silurian strata in Wales that both men were laying claim to. Though new fossil evidence and surveys supported Sedgwick's Cambrian designation, Murchison brushed those off as a local anomaly and never recanted his Silurian claim. Davidson puts it nicely: "it was clear they were fighting not only over territory, but also over different versions of what they considered the truth" (p. 173). The two men squabbled publicly until their deaths. Something similar happened when Murchison collaborated with a younger James Nicol on the rocks of the Scottish highlands. They also quickly came to different interpretations, with Murchison seeing a smooth succession of strata where Nicol saw a region of upheaval and a large fault line running through Scotland. Murchison would downplay Nicol's findings and undermine his career, even though later work proved Nicol correct.

    The third person in this story, the schoolteacher Charles Lapworth (1842–1920), is not introduced until the penultimate chapter. Working in southern Scotland, he would pioneer the use of graptolites, the microscopic remains of colonial marine animals, as fossil markers. Based on these, he would finally resolve the conflict between Sedgwick and Murchison, showing that the strata both men laid claim to for "their" geological period, were better interpreted as a separate period he called the Ordovician. This part of the book feels all too short. The reason, as Davidson explains, is that Lapworth's archived notebooks, maps, and letters "still await a biographer to do justice to his quite remarkable achievements" (p. 234).

    Many readers will likely have never seen the various rock types that Davidson describes here. Unfortunately, the book contains no colour photos, but Davidson has cleverly included various tables that clearly explain how Sedgwick, Murchison, and Lapworth assigned the various rock strata to geological periods. Also very helpful are Andrey Kurochkin's simplified sketches of stratigraphical cross-sections. Another facet of this book I appreciated is that Davidson only briefly describes his own visits to many of the locations mentioned here. He never distracts you from the historical narrative by prominently inserting himself.

    Though written for a general audience, the depth of Davidson's research stands out and will be appreciated by geologists and science history buffs. He draws on collections of letters and biographies published in the 19th century, archival resources, and unpublished material contributed by other historians. Davidson explicitly acknowledges an intellectual debt to four books, three published by American University Presses in the '80s and '90s that are now out of print and one published in 2004 by the British Geological Survey that will not have seen wide circulation. By publishing with a trade publisher, Davidson has effectively unlocked an important piece of science history to a wider audience.

    If you want to read beyond the few names that always crop up in the history of geology, such as Charles Lyell or James Hutton, this is a fascinating book on three scholars who left a lasting legacy in the names we still use today.
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Biography

Nick Davidson is a documentary filmmaker and amateur geologist. He lives in London.

By: Nick Davidson(Author), Andrey Kurochkin(Illustrator)
280 pages, b/w photos, b/w illustrations
Publisher: Profile Books
NHBS
Telling the story of the three scholars who gave us the names for five geological periods, The Greywacke unlocks for a general audience a historical episode so far consigned to more technical literature.
Media reviews

"A colourful and joyous romp through the not-so-sedate world of mid-nineteenth-century geology [...] Davidson reveals the barely credible amount of hard work that was expended in unearthing the mysteries of the rocks, and reminds us that just because everyone agrees with you, it does not mean that you are right"
– John Wright, author, The Forager's Calendar

"Engaging and persuasive [...] Everyone interested in geology should know about Murchison, Sedgwick and Lapworth"
– Richard Fortey, author, The Earth: An Intimate History

"This is history with its boots on. Deciphering the early records of life on earth demanded imagination, ambition, cooperation and controversy – and years of patient detective work in some of Britain's wildest landscapes [...] Packed with vivid stories, The Greywacke brings to life an unlikely cast of characters who changed the way we view the world"
– James A. Secord, author, Visions of Science

"Whether trudging down Welsh ravines, scrambling in the Lake District, covering vast distances across rural Russia or hard going amid the crags of north-west Scotland, the writing puts us there, in the field, on the ground [...] A great story well told"
– Andrew Greig, author, At the Loch of the Green Corrie

"A joyful collision of science, history and nature writing, The Greywacke shines a light on the almost superhuman feats of endurance, the unglamorous physical realities, the many, many hours of patient labour that the science of geology is built upon. Following the work of three important nineteenth geologists as they attempt to unlock the secrets of the rocks and the mysteries of geological time, it uncovers a story of friendships, feuds, triumphs and breakdowns. I particularly enjoyed the chapter on Lapworth: a beautifully clear and engaging description of the mechanics of stratigraphic work and a wonderful portrait of a scientist who deserves to be better known"
– Helen Gordon, author of Notes from Deep Time

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